presentasi korosi samdan 2011

8/3/2019 presentasi korosi samdan 2011

1/16

Corrosion in big ship01


2/16

02 Outline Corrosion

Big ship

Corrosion in big ship Prevention

Conclusion

Reference


3/16

Corrosion

reaction of materials withsubstances present in their

environment.

03


4/16

Big ship

Big ships are onemeans of sea transportthat can carry manypassengers

In general, this shipmade of steel plateofAISI E 2512

04


5/16

Corrosion in big ship

Uniform corrosion

Pitting corrosion

Stress corrosion Errosion corrosion

Crevice corrosion

05


6/16

Uniform corrosion

Occurred on the plate located at the topof the water and affects nearly all parts ofthe ship

06


7/16

Pitting corrosion

Pitting corrosion is the degradation ormaterial damage as a result of intensiveattacks that are local and forming sinks

or holes.

07


8/16

Stress corrosion

Stress Corrosion Cracking orabbreviated as SCC is the failure ofbrittle (brittle failure) of a material

due to the combination of tensilestress and corrosive environments

08


9/16

Errosion corrosion

Erosion corrosion is the degradationof materials caused by the presenceof high fluid flow on the surface of

the metal or due to the relativemovement between a corrosive fluidwith the surface material. This

corrosion occurs on the bowboulbous (hull bottom) and propellership

11


10/16

Crevice corrosion

Corrosion Cracks are known to occurbecause of differences in theconcentration of metal ions or oxygen

concentration in the gap with itsenvironment

09

Crevice corrosion


11/16

Prevention Cathodic proection

Coating

12


12/16

Cathodic protection

One of the sacrificial anode cathodicprotection is that by placing a sacrificialanode on the part you want protected.

Usually used on the vessel exposed toseawater, which is the lower hull,propeller - propeller and bulbous bow.

13


13/16

Coating

One is the prevention of corrosion bycoating one of which is by painting. Bypainting the surface of the boat will be

better protected from direct contact withthe environment. Type of paint is oftenused in painting the ship, among others:

cat boat shopprimer, primer coat, andintermediate coat.

14


14/16

Conclusion

Corrosion reaction of materials withsubstances present in their environment

Corrosion in bigship : Uniformcorrosion,pitting corrosion, stresscorrosion, crevice corrosion, and errosioncorrosion

Prevention corrosion in bigshipe : cathodicproection and coating

15


15/16

Reference

Alian, helmi, Ir. 2010. Laju korosi pada baja karbon

menengah dalam lingkungan air laut. Prosiding SNTTM ke-9

http://id.wikipedia.org/wiki/korosi

http://Pusllit.petra.ac.id/Journals/Mechanicals

www.39ipol.biz/id/wiki/anoda.html

www..Indonesianship.com/

.

16
http://www.39ipol.biz/id/wiki/anoda.htmlhttp://www.39ipol.biz/id/wiki/anoda.html


16/16

Sekian dan terima kasih

Any Question???

presentasi korosi samdan 2011

Documents

Transcript of presentasi korosi samdan 2011