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Flat Products
Coated Steel SheetsHot-dip Galvanized Sheets, Electrogalvanized Sheets
and Precoated Sheets
2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 JapanTel: +81-3-6867-4111
Coated Steel Sheets
© 2012 NIPPON STEEL & SUMITOMO METAL CORPORATIONU008en_01_201211f
http://www.nssmc.com/
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Post treatment
Notreatment
Coating massg/m 2
Plate thickness(mm)
Available sizes
Width mmChromate-free treatment
General Lubricating Other specialtreatments
5
6
7
8
9
10
11
13
14
15
12
16
Zn120g/m 2(17µm)
Basemetal
Zn-Al (11%)-Mg (3%)-Si (0.2%)
Basemetal
Zn-55%Al alloy78g/m 2 (21µm) Basemetal
Zn
20g/m 2 (2.8µm) Basemetal
Zn-Ni alloy20g/m 2 (2.8µm)
Basemetal
Zn-Sn-Ni alloyBasemetal
Fe-Ni alloy Basemetal
Zn-Fe alloyed45g/m 2(6µm) Basemetal
Al-Si alloy50g/m 2 (18.5µm) Basemetal
20g/m2(2.8µm)Polyester, etc.(25µm)
Basemetal
Basemetal
Special lm
Ni layer
Zn
DURGRIP TM
DURGRIP TM
SuperDyma TM
GALVALUMESTEEL SHEET TM
ALSHEET TM
ECOKOTE TM-S
ZINKOTE TM
DURZINKLITE TM
ECOTRIO TM
SUPERNICKEL TM
ZINKOTE TM COLOR
VIEWKOTE TM
30∼
120
60∼
600
60∼
275
90∼
170
40∼
160
30∼
50
10∼40
10∼
40
4∼
15
1∼
4 μ m
10∼
40
0.5∼
4.5
0.23∼
6.0
0.27∼
9.0
0.25∼
1.6
0.3∼
2.5
0.3∼
2.0
0.4∼
3.2
0.4∼
2.3
0.15∼
1.0
0.15∼
0.8
0.4∼
0.8
0.3∼
1.2
○
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○
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̶
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̶
̶
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○
̶
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̶
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̶
̶
○
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○
○
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̶
̶
○
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̶
̶
̶
○
610∼
1,850
580∼
1,840
580∼
1,700
610∼
1,230
610∼
1,250
610∼
1,250
600∼
1,650
600∼
1,650
580∼
1,024
25∼
1,000
600∼
1,650
25∼
1,300
EG type 10 ∼ 40CG type 60 ∼ 150
Decorativeness, corrosion resistance, eliminationof coating process at user plant(reduction of production process, cost cutting)*Different properties depending on the type
Decorativeness, corrosion resistance, eliminationof coating process at user plant*Preparation of a variety of product types: high heatabsorption, high reection, self cleaning, deep-drawablemetallic, antistatic, grainy, orange-peel-surfaced
Corrosion resistance
Corrosion resistance(30 times higher than common galvanized sheet )Cut-edge surface corrosion resistance
Alkaline resistanceScratch resistance
Corrosion resistance(3~6 times higher than common galvanized sheet )
Thermal resistance, heat reectivityDecorativeness (spangle)
Corrosion resistancePress formabilityWeldabilityPaint adhesion
Corrosion resistance Thermal resistance, heat reectivityChemical resistanceDecorativeness (aluminum)
Corrosion resistance (bio fuel)Fuel non-permeable property
Corrosion resistance ConductivityLubricity, formability Fingerprint resistanceScratch resistance Paint adhesion*Diverse post-treatment menu
Corrosion resistanceWeldabilityPaint adhesion
Whisker resistanceSolder wettability
Corrosion resistance (particularly after forming)Coating adhesion
Thermal resistance, heat reectivityDecorativeness (luster)
Structural member(civil engineering/ road structure)
Automobile exhaust system partsHeating equipment
Toaster, hot-water system
Fuel tank
AV equipment, electronic devicehome applianceOA equipment
Automobile outer and inner panels
Automobile outer and inner panelshome applianceHousing equipment
AV equipment, electronic deviceOA equipment
BatteryHeating equipment
Main applicationsFeaturesCoating structure(representative example)Brand nameType
Hot-dip galvannealedsteel sheet and strip
Hot-dip galvanizedsteel sheet and strip
Hot-dip aluminum-coated steelsheet and strip
Sn-Zn coated steel sheet and strip
Electrolytic zinc-coatedsteel sheet and strip
Electrolytic zinc-nickel alloy-coatedsteel sheet and strip
Zn-Si-Ni alloy coatedsteel sheet and strip
Nickel CoatedSteel Sheet and strip
Topcoat BasemetalZn
Hot-dip zinc-aluminum-magnesium-silicon alloy coatedsteel sheet and strip
Hot-dip 55% aluminum-zincalloy-coatedsteel sheet and strip
Sn-Zn layer
Special lm
Intro-ductionpage
Automobile outer and inner panelshome applianceStructural member (shutter)Steel furniture, automatic vendingmachine
Structural member ( house,civilengineering structure,road member )
Automobile outer and inner panelshome appliance
Automatic vending machineStructural member (house,agriculture/stockbreeding structure,solar panel supporting structure, civilengineering/road structure),home appliance, automobile parts
Automatic vending machine
home appliance AV equipment, electronic deviceOA equipmentHousing equipment (interior,steel furniture)
home appliance, AV equipment,electronic deviceFuel cellHousing equipment (steelfurniture, door, kitchen, bath)
H o
t - d i p g a
l v a n
i z e
d s
h e e
t
P r e c o a t e
d s
h e e
t
E l e c
t r o g a
l v a n
i z e
d s
h e e
t
Information about environmental load chemical substances contained in the productsof Nippon Steel & Sumitomo Metal Corporation is supplied in the form shown below:
1) Material Safety Data Sheet (MSDS) 2) Information about speci ed chemical substance content (supplementary MSDS) 3) Speci ed Chemical Substances Data Sheet (SSDS)
For more details, please con rm by accessing our website: http://www.nssmc.com/.
Lineup of Coated Steel Sheets of Nippon Steel & Sumitomo Metal
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Oxygenblowing
Basic-oxygenfurnaceMolten iron Continuous casting
Limestone
Sintering plantIron ore
C oa l C ok in g p la ntBlast furnace
Continuous hot-rolling mill Pickling line
Pickled coil
Cold-rolled coilCold-rolling mill
Welder
Cleaningtank
Galvanizingbath
Posttreatment
Drying Shear
Continuous annealing line
Reheating
Coil
Temper rolling mill
Secondary re ning
Galvanizingbath
Pay-off reel Heattreatment
Welder Skin pass
Posttreatment
equipment
Tension leveler Tension reel
◆ Main Characteristics
◆ Production Process
• Excellent paint adhesion and weldability—provided by reheatingthe zinc-iron alloyed layer produced by heating
• Exceptional post-painting corrosion resistance• Excellent press-formability, ranging from bending to deep
drawing• Availability of sheet with highly lubricative lm treatment
Base metal
Lubricative lm
Zn-Fe alloy layer
◆ Typical Properties
◆ Main Applications
DURGRIP has a finely textured yet rugged surface, ensuring goodpaint adhesion.
The application of lubricative lm treatment imparts good press form-ability.
3mm
5mmStretching
Treatment condition : Dip-type phosphate treatment Cation ED 20μ baking
Assessment test : After drawing grid pattern Erichsen stretch forming, cellophane
tape peeling off
Galvanized sheet DURGRIP (Galvannealed) Cold-rolled sheet
DURGRIP ( galvanized ) DURGRIP (Galvannealed) Cold-rolled sheet
•Examples of Paint Adhesion (Primary Adhesion)
• Examples of Surface Appearance of Base Substrate Sheet beforeCoating (Scanning Electron Microscope × 1,000)
Base metal
Zn-Fe alloy layer
Non-treatment type
Lubricativelm-treated type● Coating structure
(representative example)
GA (Lubricative lm treatment)
GA (no treatment)
Forming tolerance
Forming tolerance (blank folding force)
25kN 20kN 15kN 10kN 7kN
25kN 15kN 10kN 7kN
×: Split
×: Split ×: Split : Pass ×: Creased
: Pass : Pass : P as s × : Cr ea sed
Press Formability
Weldability
Paint Adhesion
The resistance weldability of galvanized steel sheet, in contrast to thatof cold-rolled steel sheet, generally requires appropriate welding con-ditions in the region of high heat input. This is because zinc is a softmetal that easily conforms to the partner metal and because zinc’s lowmelting point causes it to melt and spread out during the initial weldingstage, thereby resulting in lower current density. Consequently, lessheat is generated in the overlapped areas.
Direct Spot Weldability The appropriate welding conditions for coated steel sheets are shownin the gure below. Adequate welding current regions for coated steelsheets are higher than those for cold-rolled steel sheets.
•Example of Appropriate Welding Conditions for Galvanized Sheet
Welding pressure (Kg)
W e l
d i n g c u r r e n
t ( k A )
12
13
1110
9
8
7
6
200 250 300 400Shortage of strength
Occurrence of expulsionDURGRIP(galvanized)( 90/90)
DURGRIP(Galvannealed)(90/90)
Cold-rolled sheet
Appropriate range (base metal fracture)
t=0.8mmElectrode: Circular type, 5.0 mmøWeld time: 10∞
t=0.8mm
Hood outer, inner Cowl panelTrunk lid outer, inner
Quarter panel
Wheel house Outer
Front oor
Locker outer,inner
Pillar outer
Door outerFront fenderDoor inner
Electrogalvanizing line
Hot-dip galvanizing line
DURGRIP TMHot-dip galvannealed steel sheet and strip
• Electric appliances Washing machine, refrigerator, air conditioner, automatic vending machine (outer
plate, side plate, back plate, bottom plate, parts)
• Building and furniture Signboard, door, sash, shutter, cabinet, steel furniture, ofce equipment
• Automobile (outer, inner, parts)
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Base metal
Lubricative lm
Zn-Fe alloy layer
Base metal
Zn-Fe alloy layer
Hot-dip galvanized sheet
Chromate-free hot-dipgalvanized sheet
● Coating structure (representative example)
● Coating structure (representative example)
Zn-Al-Mg-Si
Base metal
Chromate-free special lm
Zn-Al-Mg-Si
Base metal
• Corrosion Protection Mechanism at Cut-end Surfaces
Bridge (cable rack)
Compost house (roof, frame)
Automobile parts
Air-conditioner outer unit
(bottom plate)
Lapping ofcoating layercomposition
I n i t i a l p e r i o
d
( 5 d a y s ~
6 m o n
t h s )
M i d d l e p e r
i o d
( 6 m o n
t h s ~ s e v e r a
l y e a r s
)
L a t t e r p e r i o
d
( S e v e r a l y e a r s ~
U n t
i l z i n c a r o u n d
t h e c u
t - e n
d s u r f a c e
i s l o s t
)
Repaired section
Red rust
Coating layer
Iron
Coating layer
Protection lm
Iron Iron
Iron Iron
Iron Iron
Iron
Coating layer
Moisture
Iron
Coating layerMoistureSacri ced corro-
sion-protection effect
Coating layercomposition
Lapping of coatinglayer composition
C o r r o s i o n
l o s s
( g / m 2 / s i d e )
20
40
60
80
100
120
0 2 4 6 8 10 1212.5
14pH
SuperDyma K18
GALVALUME STEEL SHEET AZ150
0
pH4~6 : Acid rain environmentpH9~14 : Cattle and compost shed environmentpH12.5 : M ortar and concrete environment
Hot-dip Zn-coatedsheet Z27
(5% NaCl solution, 24 hours)
0.028
1.02
0.1000.000 0.200 0.300 0.400
0.034
0.060
Hot-dip zinc-coated sheetZn
SuperDymaZn-11%Al-3%Mg-0.2%Si
(Reference)In case of no addition of SiZn-11%Al-3%Mg
GALVALUME STEEL SHEETZn-55%Al
Corrosion loss rate (g/m 2 /hr)
Surface treatment: No treatment
Corrosion Protection Mechanism on Cut-end Surfaces andat Welded Sections
Corrosion Resistance of Flat SurfacesThe corrosion resistance of SuperDyma (assessed by salt-spray tests todetermine corrosion rate) is extremely high — about 30 times that of hot-dipZn-coated sheets.
140120100806040200
Load: 0.098 N
Hot-dip Zn-coatedsheet
SuperDyma
GALVALUMESTEEL SHEET
Vicher’s hardness (Hv)
Zn
Base metal
Chromate-free special lm
Zn
Base metal
◆ Typical Properties
As the zinc coating mass increases, the corrosion resistance of the hot-dip galvanized sheet isextended.
The coating layer of SuperDyma is hard, thus offering high scratchresistance.
Corrosion Resistance Mechanism of Conventional Chromate Treatmentand Chromate-free Coating Film
Zinc Coating Mass and Corrosion Resistance
Cold-rolledsheet
Phosphate-treated sheet
ZINKOTE
DURGRIP(galvanized)
Chromate Coating Film Chromate-free Coating Film
Corrosion Resistance Mechanism of Chromate-freeCoating Film : Chromate-free lm uses substances selectedbecause they provide the characteristic features of chromate
lm such as its barrier effect, self-restorative function andpaint adhesiveness. Chromate-free coated sheet has been
realized by use of this special coating lm.
When this lm is injured, soluble hexavalent chromiumleaches out to offer a “self-restorative function” that repairsthe lm.
1
100
200
300
2Period (years)
3 4
C o r r o s i o n
l o s s
( g / m 2 )
Function of Chromate Coating Film ffect
restoration function
Effects similar to those offered byspecial coating lm containing corrosion-suppression agent
① Shutting out of corrosion factors
② Self-restorative function
③ Coating adhesiveness
Chromate coating lm
Coating lm
③ Coating adhesiveness
Coating lm
Processed/ injured section
Special coating lm(containing corrosion-suppression agent)
Zinc coating layer
Steel sheet
② Corrosion- suppression function
① Shutting out of corrosion factors
Corrosion factorH2O O2
Zinc coating layer
Steel sheet
50
100
200
300
100Coating mass (one side:g/m 2 )
150 200
T i m e u p
t o o c c u r r e n c e o f r e
d r u s t
( H r s
) Testing condition (JIS Z 2371) Room temperature : 35˚C Saline solution : 5%
• Zinc Coating Mass and Time up to Occurrence of Red Rust (Example) (Salt Spray Test)
◆ Main Characteristics ◆ Main Characteristics• High corrosion, and rust resistance similar to that of
conventional chromate-treated sheet even with chromate-free treatment
• Excellent zinc adhesion and responsiveness to severefabrication conditions
• Product lineup with excellent tribological properties bymeans of chromate-free treatment
• With remarkably high corrosion resistance compared to hot-dip galvanizedsteel sheet, inhibits corrosion resistance in cut-end surfaces
• Strong alkaline resistance even in direct contact with mortar and concrete• Superior substitute for stainless steel (weak in chlorine resistance) and
aluminum (weak in alkaline resistance)• Availability of chromate-free sheet having properties similar to those of
chromate-treated sheet
◆ Typical Properties Coating Layer Composition and Corrosion Resistance(Salt Spray Tests)
Acid and Alkaline Resistance of Various Coated Sheets
Scratch Resistance
◆ Main Applications
SuperDyma TMHot-dip zinc-aluminum-magnesium-silicon alloy coated st eel sheet and strip
DURGRIP TMHot-dip galvanized steel sheet and strip
• Civil engineering structure and buildingconstruction
Guard rail, corrugated pipe, spiral pipe, deck plate,
duct, roofing material, fence, sound-insulation
wall, scaffolding pipe, light-gauge shape, shutter,
sash, door, housing structural member (column,
beam)
• Automobile Floor, various parts
• Shipbuilding Duct, panel
• Electric appliance Ref r ige ra to r, wash ing mach ine , hea t ing
equipment, air conditioner, automatic vending
machine, showcase parts
• Industrial machinery Cont ainer for transporting agricultural product,
various parts requiring corrosion resistance
◆ Main Applications
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● Coating structure (representative example)
● Coating structure (representative example)
Zn-55%Al
Base metal
Chromate-free special lm
Zn-55%Al
Base metal
Materials
GALVALUME STEEL SHEE T (no coating)
Prepainted sheet (light color, brightness 6.0 – 8.5)
Prepainted sheet (deep color, brightness 4.5 ‒ 7.0)
Tile, slate (light color)
Tile, slate (dark color)
Concrete, cement
Hot-dip galvanized sheet
Heat Re ectivity ( %)
70 – 75
30 – 70
15 – 40
20 – 30
10 – 20
20 – 30
30 – 40
Note: Data of Bluescope Lysaght
GALVALUME STEEL SHEET Hot-dip galvanized sheet
Solar radiation850W/m2(no wind)
Solar radiation850W/m2(no wind)
0
50
100
150
W/m2
0
50
100
150
W/m2
•Example of Heat Reectivity of Various Roong Materials100 200 300 400 500 600 700 80 0 900
Hot-dip galvanized sheet [Z 25](400˚C)
0
1
2
3
4
5
6
7
8
9
10
Oxidation time (hours)
O x i
d a t i o n a m o u n t g / c m
2
GALVALUME STEEL SHEET [AZ 150](400˚C)
Hot-dip galvanized sheet Z 25 300°C
GALVALUME STEEL SHEET [AZ 150](300˚C)
0 1,000 2,000 3,000
Cut-end surface protection
1% red rust occurrence time (hours)
Hot-dip galvanized sheetZ27
GALVALUME STEEL SHEET(AZ150)
GALVALUME STEEL SHEET(AZ150)
◆ Main Characteristics• Excellent durability and corrosion resistance• Beautiful silvery white appearance with a nely spangled
pattern• Excellent thermal resistance and high heat re ectivity due to
aluminum contained in the coating• Available with chromate-free lm
◆ Typical Properties
◆ Main Applications
The surfaces of GALVALUME STEEL SHEET exhibit excellent heatreflectivity, showing no substantial deterioration after long-termexposure to high temperatures. Materials with high heat reflectivityshow a minimal rise in temperature. The use of materials with highheat re ectivity particularly in roo ng subjected to large thermal loadsis highly effective in preventing increases in indoor temperature. Because of the combinat ion of this property with theaforementioned excellent heat re ectivity, GALVALUME STEEL SHEETis suitable for such applications as the heat shields and the heatre ectors for toasters and microwave ovens.
GALVALUME STEEL SHEET has high aluminum content, 55% ofmass and 80% of capacity, and shows better thermal resistance thanordinary hot-dip galvanized steel sheets. Even when exposed to highair temperatures, it shows neither signi cant increase of mass due tooxidization nor any surface discoloration due to progressive alloying.When used for many hours under temperatures around 350˚C, itundergoes little change. The gure below shows the change in mass when steel sheets arecontinuously heated in the atmosphere. It is evident that GALVALUMESTEEL SHEET undergoes less change due to oxidization than hot-dipgalvanized steel sheet.
Thermal Resistance
Corrosion Resistance
Heat Reectivity
•Example of Oxidation Amount due to Continuous Heating• Example of Comparison of Heat Reectivity between GALVALUME
STEEL SHEET and Hot-dip Galvanized Sheet (3 years after construction)
•Example of Red Rust Occurrence Time
Al-Si
Base metal
Chromate-free special lm
Al-Si
Base metal
ALSHEET
90
80Heatreectivity
Hot-dip galvanized sheet
95
30
Item Testcondition
Material
( )
•Measurement at room temperature after heating
•D and S AERP emissivity meter (measurement wave 3 – 30m)
ALSHEET Hot-dip galvanized sheet Electrogalvanized sheet Cold-rolled sheet
* ( ): Corrosion loss
Cold-rolled sheet set as 100
TypeCorrosion rate (%)
22.9%
50 100
27.5%
30.1 %16m *
92 .8% 80m※
100 %87 m※
18%Cr stainless steel
13%Cr stainless steel
ALSHEET 80g/m 2
Cold-rolled shee
Electrogalvanized sheet20/20g/m 2
◆ Main Characteristics• Outstanding weather resistance and corrosion resistance• Discoloration and high thermal resistance in high-temperature
application• Excellent high-temperature heat re ectivity, compared to hot-
dip galvanized steel sheets
◆ Typical Properties
The surface appearance of ALSHEET at high temperatures is farsuperior to that of hot-dip galvanized steel sheet or that of cold-rolled steel sheet. No surface discoloration occurs at 350˚C or under.
At tempera tures above that, the surface becomes an A l-Fe alloy,causing a discoloration. However, this conversion to an alloy preventsoxidization of the base metal, helping to retain the steel sheet’s thermalresistance.
•An example of surface conditions after heating (300°C × 200 hours)When heated at temperatures below 350°C, ALSHEET undergoes no surfacediscoloration, retaining its beautiful appearance.
Because ALSHEET, like aluminum, easily generates fine yet stableoxide and hydroxide lms in the atmosphere and in water, its corrosionresistance under various conditions is superior to that of galvanizedsteel sheets. In application, however, it should be borne in mind that,contrary to galvanized steel sheet, galvanic action (sacri cial action)cannot be expected of ALSHEET.
•Cyclic wetting and drying tests (Resistance to exhaust gas corrosion) As a result of c orrosion tests using automobil e e xhaust gas-conde nsedsimulated uids, ALSHEET demonstrates better corrosion resistance than doelectrogalvanized steel sheets and cold-rolled steel sheets.
•Example of Mufer Test Result (Chrysler's Spec 461H-83)
Because of its extremely beautiful surface, ALSHEET showsexceptional heat re ectivity—nearly 80% at temperatures of 450°C orbelow. Accordingly, ALSHEET is ideal for use in applications requiringheat re ectivity, including the inner heat shields for toasters and theupper re ectors for gas ovens and kerosene heaters.
•Example of Heat Reectivity of Various Materials
Thermal Resistance Corrosion resistance
Heat reectivity
◆ Main Applications
ALSHEET TMHot-dip aluminum-coated steel sheet and strip
GALVALUME STEEL SHEET TMHot-dip 55% aluminum-zinc alloy-coated steel sheet and strip
• Building construction and civilengineering structure
Roong material, wall material, partition,other structural metal ttings
• Electric appliance Refrigerator, washing machine, air
conditioner, automatic vending machine,showcase, range, stove, microwave oven
Unlike zinc, aluminum has the property of being resistant to weakacidity and vulnerable to alkalinity.
Chemical resistance
• Hot-water system• Oven toaster• Bread machine• Stove• Fan heater• Cloth dryer• Automobile (mu ffler, manifold cover,
converter cover)
100˚C×24Hrs
400˚C×24Hrs
ZINKOTE
electrogalvanizedsheet Spangled
95
20
Non-spangled
95
20
(unit:%)
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● Coating structure (representative example)
● Coating structure (representative example)
20
10
20
10
030 5030 50 72 72
0
Test time (hr) Test time (hr)
QS1QF1 T1NQM
QS1QF1 T1NQM
QS1
QS1
QMQF1T1N
QMQF1T1N
QMQF1T1N
QMQF1T1N
100908070605040302010
TN
QS1
T1N
Constant current source
V
i
Test piece
Conducting=Les than 1m Ω
Measurementdevice
Measurementsystem
Measurementrange
Probe
Assessment
Loresta EP type madeby Mitsubishi Chemical Corp.4 contact/4 probe method,constant current application system
10-2∼ 106 ΩESP probePin tip 2 mm φ × 4 contacts, pin interval 5 mm
spring pressure 2.4 N/spring
Conducting rate % × 100Conducting cycle
20 cycles
R u s
t o c c u r r e n c e a r e a r a
t e
( % )
R u s
t o c c u r r e n c e a r e a r a
t e
( % )
Conducting rate (%)
Pretreatment
Base metal
Sn-Zn alloy layer
Chromate-free special lm
Regulation for upper limitfor fuel permeation
Promotion of recycling
Lighter weight
Regulation for environmentburden substanceIncreasing use of eco-friendly fuel
ECOKOTE TM-S ( Sn-Zn coating )
ALSHEETTM ( aluminum coating )
TERNESHEET ( Pb-Sn coating )
Inferior permeation shut-offperformance
Inferior recyclability
No inclusion of environmentburden substanceGrowing concerns aboutpermeation and deterioration
Use of lead
Concerns about corrosion resistancein case of using common bio fuel
Outstandingly highcorrosion resistance
No fuel permeation because of steel sheet
High recyclability because of steel sheet
Lighter weight by use of steel’s rigidity instead of identical capacity
ECOKOTE TM-S(Sn-Zn coating)
ALSHEETTM
(Aluminum coating)TERNESHEET
(Pb-Sn coating) Resin
No inclusion of environment burden substance
Excellent
Excellent
Fair
Excellent
×
Fair
Excellent
Fair
Fair
Excellent
Fair
Excellent
Fair
Fair
Good
Excellent
Excellent
Excellent
Excellent
Excellent
Fair
Degradedgasoline
Degraded20%FAME-
mixed gasoline
Degradedethanol-mixed
gasoline
Inner surface corrosion resistanceOuter surfacecorrosionresistance
Pressformability Wel da bi li ty P ai nt ab il it y
ZEV regulations (US) Bio fuel
ELV regulations (Europe)
ECOKOTE
TM
-SECOKOTE TM
-SVoluntary regulationsof Japan AutomobileManufacturers Association (Japan)
Regulation for upperlimit for fuel permeation
Emerging environmentalneeds facing fuel tank
materials
Regulation forenvironmental burden
substance
Increasing use ofeco-friendly fuel
Promotion of recycling
Lighter weight
Requirements of fuel tankmaterials: total absence ofsubstances that add toenvironmental burden,resistance to new fuels, nofuel permeation,advantageous for recycling,and light-weight design
Regulation for newfuel ef ciency
AutomobileRecycling Law
◆ Main Characteristics• Higher corrosion resistance than found in conventional fuel
tank metallic materials• High corrosion resistance, even when used with bio fuels• Meets hydrocarbon permeation regulations; is free of
environmental load substances• Highly recyclable
◆ Typical Properties Responsiveness to Environmental Preservation: ECOKOTE TM-S is most suitable for use as an eco-friendly fueltank material.
Zn
Base metal
Surface treatment
Corrosion Resistance Mechanism of Chromate-free Coating Film
Application (example)
Flat panel display
Copying machine, printer
Application member
Chassis, various parts
various parts
• Main End Products Employing ZINKOTE
ZINKOTE is a chromate-free electrogalvanizedsheet used for at panel displays, copyingmachines, printers and other devices andequipment.
Salt Spray Test: Flat Surface Section and Formed Section (Erichsen 7 mm Extruded Section)
Effects similar to those offered by special coatinglm containing corrosion-suppression agent
Corrosion Resistance Mechanism of Chromate-freeCoating Film : Chromate-free lm uses substances selectedbecause they provide the characteristic features of chromate
lm such as its barrier effect, self-restorative function andpaint adhesiveness. Chromate-free coated sheet has beenrealized by use of this special coating lm.
When this lm is injured, soluble hexavalent chromium leaches outto offer a “self-restorative function” that repairs the lm.
Function of Chromate Coating Film ffect
restoration function
③ Coating adhesiveness
Coating lm
Processed/ injured section
Special coating lm(containing corrosion-suppression agent)
Zinc coatinglayer
Steel sheet
② Corrosion- suppression function
Corrosion factorH2O O2
① Shutting outof crrosionfactors
High formability and lubricity due tosurface lm action
Excellent conductivity and adhesionbecause of thin lm thickness
Organic lm
Inorganic lm
• Importance on conductivity• Importance on corrosion resistance
and scratch resistance
• Importance on conductivity, paintabilityand ironing property
Film Required performance
• Example of Corrosion Resistance of Flat Surface Section(A kind of typical surface treatments is shown)
• Example of Corrosion Resistance of Formed Section
◆ Main Characteristics• Demonstrates similar effects in application as chromate-treated sheet
due to ZINKOTE’s special lm containing a corrosion inhibitor• Availability of characteristic properties that conform to respective
customer needs thanks to ZINKOTE’s diverse post-treatment lineup[Main Properties of ZINKOTE] •Corrosion resistance •Lubricity •Conductivity •Spot weldability
•Thermal resistance •Alkaline resistance •Solvent resistance•Fingerprint resistance •Paint adhesion
ZINKOTE: Used for high-performanceelectric appliances and OA equipment
◆ Typical Properties ◆ Main Applications
ZINKOTE TMElectrolytic zinc-coated steel sheet and strip
ECOKOTE TM -SSn-Zn coated steel sheet and strip
Characteristic Properties of Fuel Tank Material
Conductivity (Grounding Property)
Corrosion Resistance
• Fuel tank
◆ Main Applications
• Various Parts Audio equipment, etc
• Side Plate Refrigerator, washing machine, etc
• Chromate-free Coating Film
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100
0
200
300
4020 60
Coating mass (g/m 2 )
5 % r
e d r u s t o c c u r r e n c e
t i m e
( h o u r s
)
80 100
DURZINKLITE
ZINKOTE
DURGRIP(galvanized)
Base metal
Zn-Ni alloy
Reference: Time required for the occurrence of red rust in the salt spray test JIS Z 2371
Weldability
In commonly conducted salt spray testing, the bare corrosion resistance ofDURZINKLITE coated surfaces is more than 3 times greater than galvanizedsheets with equal coatings. This product shows favorable corrosionresistance even with a thin coating mass, but the provision of a specialchromate treatment further improves corrosion resistance.
Individual spot or seam welding of DURZINKLITE can be conducted usinglow welding current, and because the welding current range is wide, weldingis easy. Examples of single spot welding at a range of welding currents forboth-side galvanized sheet are shown at right. In each case, adequatenuggets are formed using a comparatively low welding current, and therecommended range of welding currents is wide to allow easy welding.
DURZINKLITE(20g/m2 )
ZINKOTE(20g/m2 )
DURGRIP(galvannealed)(45g/m2 )
Cold-rolled sheet
Type
dn=4√t
Welding current (KA)
6 7 8 9
Appropriate weldingcurrent range
Shortage ofnugget diameter
Electrode welding
• Example of Welding Current Range for Single Sport Welding of Both-side Galvanized Sheet
• Example of Corrosion Resistance Assessment of DURZINKLITE (Non-treated Sheet Salt Spray Test)
Conductive lm
Zn (electrogalvanizing)
Base metal
Zn (electrogalvanizing)
Topcoat
Standard type
Improvedscratch-resistant type
Standard type
Improvedscratch-resistant type
Standard type
Standardboth-sided black type
● Coating structure (representative example)
● Coating structure (representative example)
KJ1
KJ2
SJ1
SJ2
HJ1
K1K1
K1KC
KJC
D (general)D5 (high roughness)
D
D
D
D
D (general)D5 (high roughness)
D (general)D5 (high roughness)
D (general)D5 (high roughness)
Excellent cost performance due to improvedtopcoat performance; Preparation of two kinds ofsurface roughness depending on appearance ̶general roughness and high roughness
Improved scratch resistance due toaddition of large-diameter beads to lm
Excellent cost performance dueto improved topcoat performance
Excellent cost performance due to improvedtopcoat performance
Excellent cost performance dueto improved topcoat performance
Improved scratch resistance due toaddition of large-diameter beads to lm
Standard black lm (KJ1 lm) on one side, andconductive heat-absorption black lm on the other
Conductive clear lm (QS lm) on one side, andconductive heat-absorption black lm on the other
Color Type Heat treatment symbol Surface nish
Black
Silver
White
Black
Conductive,heat-absorbingblack
Standard conductive,heat-absorbing black type
Conductive, heat-absorbingtype with conductive clear lm
◆ Main Characteristics ◆ Main Characteristics• Excellent cost performance and reduced manufacturing term at user
plant by coating only one side of ZINKOTE with a beautiful topcoat• Available colors (3): black, silver and white, and preparation of
improved scratch-resistant type• Black coated sheets (2): both-sided black coated type, and high-
conductivity/good heat-absorption type
• Outstandingly high corrosion resistance even with conventionalelectrolytic galvanizing mass
• Fine appearance and nishing after coating, similar to cold-rolled sheet• Easy spot and seam welding
◆ Product Lineup ◆ Typical Properties
◆ Main Applications • Home appliance•AV equipment, electronic device•OA equipment•Housing equipment (interior, steel furniture)
Bare Corrosion Resistance
DURZINKLITE TMElectrolytic zinc-nickel alloy-coated steel sheet and strip
ZINKOTE TM COLORPre-Coating Steel Sheet and Strip
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● Coating structure (representative example)
● Coating structure (representative example)
Base metal
Ni layer
Fe-Ni alloy layer
•Binder
•Battery
•Portable cooking stove
•Toaster
•Stove re ection plate
External appearances of the top and body parts of size C and AAbatteries made of SUPERNICKEL steel sheets and Ni-coated sheetswithout alloy layer, after subjected to 60 minutes of salt spray tests areshown below.In both cases, batteries made of SUPERNICKEL steel sheet showsbetter post-fabrication corrosion resistance.
SUPERNICKEL steel sheet shows better corrosion resistance thanNi-coated steel sheet without alloy layer on both unfabricated andfabricated parts due to ① reduced pinholes on the coating layer,② formation of an Fe-Ni alloy layer having good adhesion, and ③ improved ductility due to recrystallization and softening of the Nicoating layer.
SUPERNICKEL steel sheet has heat resistance comparable tostainless steel (SUS) that is normally used as a heat-resistant material(heating temperature ~300°C). As typical evaluation results of heatresistance, changes in glossiness, changes in infrared-ray re ectance
and changes in color tone on heating are shown below.
Post-fabrication Corrosion Resistance
Corrosion Resistance of As-coated Flat Sheet WithoutFabrication
※SST: Pursuant to JIS Z 2371
Heat Resistance
Surface gloss
Coating Adhesion (workability)
• External appearances after SST (coating thickness: 2μm)
Ni-coated sheetwithout alloylayer
Comparative example:Ni-coated sheet without alloylayer (non-diffusion type)
Top Body
SUPERNICKEL
SUPERNICKEL
• Glossiness of surface nish
•An example of evaluation of coating adhesion (workability)
△
◎
△
×
×
Coating
adhesion
(tape peeling)
Work follow
(SEM observation)
Test Methods
Bending test
Erichsen test
Cupping test
Bending test
Erichsen test
Bending test
Erichsen test
Cupping test
◎
◎
◎
○
○
1 2 3 4 5
Coating thickness (μm)
1000
900
800
700
600
500
400
300
200
100
G l o s s
i n e s s
BM nish
BE nish
B nish
Evaluation methodGlossiness:Measured in transverse direction at an incidence angleof 60 degrees with Nihon Denshoku Model VGS-ID glossmeter.
Base metal
Chromate-free special lm
Zn-Sn-Ni alloy layer
•Switch metal tting •Flow regulating valve
•Condenser case
• Heat sink metaltting
• Electrical equipmentmetal tting
• Electrical equipmentmetal tting
•Tuner cover
•Shield cover
Chromate-free Coating Film
High in whisker resistance, solder wettability and corrosion resistance
Solder Wettability (Solder Wetting Time)
Corrosion Resistance
[Test condition]Test piece: Plate thickness 0.3 mm,
cup formingEnvironment:60˚C × 90%RHTime:1000hrs
[Test condition]Test piece: 0.3mm×20mm×7mmKind of solder: Sn-Ag-Cu Solder melting temperatureFlux applied: Rosin alcohol active typeaccleleration conditions: 100°C (saturated humidity),
8 hrs
Without acceleration After acceleration
10
8
6
4
2
0
B a
d
G o o
d
8hrs24hrs48hrs
100
80
60
40
20
0
O b s e r v e d m a x i m u m
w h i s k e r l e n g t h ( µ m )
S o l
d e r w e t
t i n g
t i m e
( Z e r o c r o s s i n g t i m e ) ( s e c )
ECOTRIO3X/3X
ECOTRIO8/8
Electrolytic tinplate2.8g/m 2
ECOTRIO3X/3X
ECOTRIO8/8
Electrolytic tinplate2.8g/m 2
ECOTRIO3X/3X
ECOTRIO8/8
Electrolytic tinplate2.8g/m 2
200
160
120
80
40
0
* The data shown here is an exampleof test results, which therefore doesnot mean any quality guarantee.
* In cases when the whisker resistanceunder strict high-temperature condi-tions (for example, high temperatureand high humidity surpassing 60°C)is required, the product with impor-tance on whisker resistance can beproposed. For details, please sendinquiries.
[Test condition]Corrosion resistance: (Salt spray test JIS Z2371)Test piece: Flat sheet with edge seal
B a
d
G o o
d
R a t
i o o f r e
d r u s t
o c c u r r e n c e a r e a
( % )
◆ Main Characteristics ◆ Main Characteristics• Lead-free and chromate-free, and conforms to RoHS (Restriction of Hazardous Substances) Directive• Greater suppression of whiskers compared to electrolytic tinplate• Solderability and conductivity that are similar to electrolytic tinplate and higher than those
of galvanized steel sheet• Availability of thin-gauge products with a minimum thickness of 0.15 mm• NEW ECOTRIO even in thin coating mass specications: Taking over the basic proper ties of ECOTRIO• High-strength ECOTRIO: Cost-cutting substitute for nickel silver and stainless steel sheets
• High adhesion and corrosion resistance due to formation of Fe-Ni alloy layer• Availability of material quality that conforms to the particular application and the degree of
fabrication• Diverse surface nishes are available, from an outstandingly ne mirror nish to a rough dull nish.• Availability of coatings from thin to h eavy and of differential coating s on front and rear surfaces• Same thermal resistance as that of stainless steel
Cellophane tapes on the inside and outside are peeled aftera 30mm-deep cup is drawn.
A cellophane tape on the coating is peeled after a 7mm-deep cup is formed.
◆ Typical Properties ◆ Typical Properties ◆ Main Applications ◆ Main Applications
◆ Main Applications
Fabricatedintosize Cbatteries
•Game console•Automobile AV equipment•TV set•Personal computer•Electric and electronic parts•Audio system
SUPERNICKEL TMNickel Coated Steel Sheet and strip
ECOTRIO TMZn-Si-Ni alloy coated steel sheet and strip
(No peeling found)
(No peeling found)
(No peeling found)
(Virtually no cracks found)
(Virtually no cracks found)
A cellophane tape on the coating is peeled after 0T bend.
(Peeling found)
(No peeling found)
(Peeling found)
(Many cracks found)
(Many cracks found)
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● Coating structure (representative example)
Rear surface coating
Base metal
Primary coating
Surface treatment
Surface treatment
Topcoat
Lightingequipment
Flat-panel TV
Digital recorder
Auto on-boardequipment
Outdoorair-conditioner unit
Refrigerator,washing machine
Automobile parts
Re ectingboard
Back panel
Chassis
Chassis
Top, outside panel
Side panel
Oil lter
Front sideBack sideFront sideBack sideFront sideBack sideFront sideBack side
Front sideBack sideFront sideBack sideFront sideBack side
VIEWKOTE TypeⅠVIEWKOTE TypeⅠVIEWKOTE TypeⅣ
Electroconductivity TypeVIEWKOTE TypeⅣ
Electroconductivity typeVIEWKOTE TypeⅣ
Heat Absorption Type
VIEWKOTE TypeⅣVIEWKOTE TypeⅡVIEWKOTE TypeⅣ
Rear surface coatingVIEWKOTE Type CLubrication Type
Self-Cleaning Type VIEWKOTE
Deep Drawable Metallic VIEWKOTE
Antistatic Type VIEWKOTE
Grainy VIEWKOTE
Orange-Peel-Surfaced VIEWKOTE
❶ Hydrophilic coating vastly improvesresistance against rain drop stains.
❷ Offers high workability thanks tooptimal substrate design.
❸ Also offers excellent weatherabi lityand stain resistance in processedareas.
❹ A w ide rang e o f colo r v aria tion s,including metallic tones.
❺ Chromate-free and eco-friendly.
❶ Offers attractive appearances.❷ Suitable for processing applications
that require bending or drawing.❸ Add fun cti on s by sel ect in g the
appropriate back coating.
❹ Chromate-free and eco-friendly.
❶ Prevents static electricity caused byfriction from conveyors and rubbersuction disks in the processing/ production process.
❷ Reduces dust adhesion caused bystatic electricity.
❸ Reduces electric shocks caused bystatic electricity.
❹ Chromate-free and eco-friendly.
❶ By adding beads with large particlediameters to the coating,this type of
VIEWKOTE features h ighly decora-tive designs,much better than thoseof conventional prepainted steelsheets.
❷ The decorative designs can beimproved further by combiningembossing and/or press forming.
❸ Chromate-free and eco-friendly.
❶ A pebbled surface like that of an orangepeel is achieved by special beads in thecoating. These beads then melt duringheating when the coating is enameled.
❷ This coating improves processingyield by making handling scratchesless visible.
❸ Its workability, chemical resistance,and other basic properties are thesame as conventional VIEWKOTE.(Can also include antis tatic property.)
❹ Chromate-free and eco-friendly.
Coating Structure(Example)
Primer coating
Chemicaltreatment
Galvanizedsteel sheet
Chemicaltreatment
Back coating
Self-Cleaning TypeCoating
Primer coating
Chemicaltreatment
Galvanizedsteelsheets
Chemicaltreatment
Back coating
Deep DrawableMetallic Type
Coating
Coating Structure(Example)
Coating Structure(Example)
Antistatic Type VIEWKOTE
Coating
Primer coating
Galvanizedsteel sheet
Chemicaltreatment
Chemicaltreatment
Back coating
Coating Structure(Example)
Primer coating
Galvanizedsteel sheet
Chemicaltreatment
Chemicaltreatment
Back coating
Grainy VIEWKOTE
Coating
Orange-Peel-Surfaced
VIEWKOTE Coating
Coating Structure(Example)
Primer coating
Galvanizedsteels heet
Chemicaltreatment
Chemicaltreatment
Back coating
•How self-cleaning works
• Processing Examples of Deep Drawable Metallic Type
•Example: Comparison of charged voltage
•Example:Appearance after embossing 1mm
• Example:Orange-Peel-Surfaced VIEWKOTE
Beige color Brick colored
Hydrophilic coating
The hydrophiliccoating allows dropsof water to penetrateunder stains
The stains arethen washedaway
Stain
Water
Outdoor exposure for1.5 years at Kimitsu City,Chiba, Japan (industrialzone)
Self-CleaningType
Conventional VIEWKOTE foroutdoor air-conditionerunits
Experiment conditionsMeasurement of thecharged voltageof thecoatingsurface bynon-contact typestaticelectricitymeasuring apparatus immediatelyafter VIEWKOTE sample (70×150mm)makescontactwithapieceofneopreneresin(50×100mm)andis thendetached.
0
0.1
0.2
0.3
C h a r g e d v o
l t a g e
( k V )
Antistatic Type VIEWKOTE Conventional VIEWKOTE
82
Zn standards
Indicatedthickness
Coating mass
Back coating
Top coating
EGC
0.55mm
20/20
VIEWKOTEE type
Silver metallic(VIEWKOTEType $ )
High Heat Absorption Type VIEWKOTE
High Reection Type VIEWKOTE
❶ Heat absorption type VIEWKOTEdischarges heat from devices/ equipment.
❷ Heat absorption coating inside thedevice enclosure facilitates heatabsorption and discharge. Thebroad VIEWKOTE menu allows
❸ VI EW KO TE st ee l s he et s ar echromate-free and eco-friendly.
❶ Diffuse reectivity of 92-98%.
❷ Can be deep drawn.❸ Has excellent basic propert iesincluding corrosion and chemicalresistance.
❹ Both electromagnetic shielding andtemperature control can be achievedby selecting heat absorption typeswith good electroconductivity in theback coating.
❺ Chromate-free and eco-friendly.
• Atmospheric thermometry result of the interior of theBox (example)
•Measurement of diffuse reection factor (example)
Coloredtopcoating
Primer coating
Chemicaltreatment
Galvanizedsteelsheet
Chemicaltreatment
Heat AbsorptionCoating
Coating Structure(Example)
Primer coating
Galvanizedsteel sheet
Chemicaltreatment
Chemicaltreatment
Back coating
High ReflectionCoating
Coating Structure(Example)
T e m p e r a t u r e
( ° C )
Measurement time (min)
80
70
60
50
400 20 40 60 80 100 120
ZINKOTE
Heat Absorption
Dropabout10̊C
Under these experimental conditions, steelsheets with an endothermic lm can reducethe atmospheric temperature of the interiorof the Box by about 10˚C in comparison tothe bare speci cations of ZINKOTE.
80 82 84 86 88 90 92 94 96 98 100
Diffuse Reflectivity (Wavelength 555nm)
General whitePCM
High ReflectionVIEWKOTE(92% type)
High ReflectionVIEWKOTE(98% type)
Reflection film
Improved to diffuse reflectivityof 10% or more.
※ Can be designed with reflectivity of 92 or 98%,depending on the application.
Hi gh R
ef l e c t i onT y p e
V I E WK
OT E
VIEWKOTErecommended speci cations
VIEWKOTErecommended speci cations
Application parts/ materials
Application parts/ materials Application Application
◆ Main Characteristics• Smooth and ne painted surface• Selection of colors and material properties that meet speci c needs, through the combined use of diverse paints and base substrates• Improved such factors as process, space, energy and load savings at user plant[Paint type of VIEWKOTE] •Type Ⅰ / Highly workable type •Type Ⅱ / Balanced type in workability surface physical properties
•Type Ⅲ / Stain-resistance type •Type Ⅳ / Highly workable, stain-resistant type(universal type)•Type Ⅴ / Highly corrosion-resistant type
• Home appliance•AV equipment, electronic device•Fuel Cell•Housing equipment (door, kitchen, bath)
◆ Typical Properties
◆ Premium Series
VIEWKOTE TMPre-Coating Steel Sheet and Strip
Example: To discharge internal heat,select high heat absorptiontype coating.
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