0 10 20 30 40 50 60

0

20

40

60

80

100

Cohe

sive H

ealin

g Effic

iency

(%)

Time (Min.)

Progress

Sol-Gel Based Self-Healing Corrosion Protective

CoatingsSelf-Healing Corrosion Protective Coatings

Publications

- M. AbdolahZadeh, S. van der Zwaag and S.J. Garcia, Routes to extrinsic and intrinsic self-healing anticorrosion sol gel coatings- A Review, submitted to Journal of Self-Healing Materials

- M. Abolah Zadeh, S.J. Garcia, S. van der Zwaag, Sol-Gel Based Intrinsic Sel-Healing Polymers, in: 8th Coatings Science International, Noordwijk, The Netherlands, 2012, pp. 52.

Composition

Healing Evaluation

A. Composition Effect

B. Cross-Linking Density Effect

PhD Candidate: Mina AbdolahZadehDepartment: L&RSection: AMMSupervisor: S.J. Garcia Promoter: S. van der ZwaagStart date: 1-4-2011Funding: IOPCooperations: Akzo Nobel, Tata Steel

Aero

spac

e En

gine

erin

g

1st generation: Direct inhibitor additionWeakness: network instability

2nd generation: Indirect inhibitor additionWeakness: limited healing events

A.

Our approach:

Intrinsic healing sol-gel coatings(3rd generation)

B.

Extrinsic healing approaches in Corrosion protective sol-gel coatings

SS

SS Si

SiO

OO

O

O

OCH3

CH3

CH3

CH3

CH3

CH3

Epoxy – Silane Hybrid

Epikote 828 + Ancamine 2500 +

Si:Epoxy Resin weight ratio 1:1

BS

APS

Healing

A0

At

500 µm

500 µm

Healing

Cohesive Healing Efficiency (% )=( A0− A tA0 )×100

0 20 40 60 80 100 120

0

20

40

60

80

100

Cohe

sive H

ealin

g Effic

iency

(%)

Time (Min.)

3BS:APS-Ex 2BS:APS-Ex 1BS:APS-Ex

0 5 10 15 20 25

0

20

40

60

80

100

Cohe

sive H

ealin

g Effic

iency

(%)

Time (Min.)

Progress

C. Kinetics

D. Healing Mechanism

Tetra-thiol

500 1000 1500 2500 3000 3500 4000

S-HC=OC-CC-S

Inten

sity (

a.u.)

Raman Shift (cm-1)

T = 20 oC T = 30 oC T = 40 oC T = 50 oC T = 60 oC T = 70 oC T = 80 oC T = 90 oC

S-S

0 10 20 30 40 50 60

0

20

40

60

80

100

Cohe

sive H

ealin

g Effic

iency

(%)

Time (Min.)

TH= 50 oC

TH= 70 oC

TH= 90 oC

Hot Stage

Sample

Cross-Linking Density of Organic Phase

Cross-Linking Density of Inorganic Phase

20 30 40 50 60 70 80 900,2

0,4

1,4

1,6

1,8

Peak

Are

a(T)

/ Pea

k Are

a inter

nal s

tanda

rd(T

)

Temp. (oC)

S-S C=O

Excitation Light

Elastic Scattered Lig

ht

Inelastic Scattered Lig

ht

Sample

Hot Stage