Transcript Progress

Sol-Gel Based Self-Healing
Corrosion Protective
Coatings
Self-Healing Corrosion Protective Coatings
Healing Evaluation
Progress
Extrinsic healing approaches in
Corrosion protective sol-gel coatings
1st generation:
Direct inhibitor addition
Weakness:
network
instability
B.
C. Kinetics
A0
2nd
generation:
Indirect inhibitor addition
Weakness: limited healing
events
100
500 µm
80
Healing
Cohesive Healing Efficiency(%)
A.
PhD Candidate: Mina AbdolahZadeh
Department: L&R
Section: AMM
Supervisor: S.J. Garcia
Promoter: S. van der Zwaag
Start date: 1-4-2011
Funding: IOP
Cooperations: Akzo Nobel, Tata Steel
Healing
At
Our approach:
500 µm
60
40
o
T = 50 C
H
20
o
T = 70 C
H
o
T = 90 C
0
H
Intrinsic healing sol-gel coatings
(3rd generation)
0
10
20
30
40
50
60
Time (Min.)
Cohesive Healing Efficiency % =
A0 − At
A0
× 100
D. Healing Mechanism
Progress
A. Composition Effect
Cohesive Healing Efficiency (%)
80
Excitation Light
3BS:APS-Ex
60
2BS:APS-Ex
1BS:APS-Ex
40
Sample
Sample
20
Hot Stage
Hot Stage
0
0
20
40
Composition
60
80
100
S-S C-S
120
C=O
C-C
S-H
Time (Min.)
Epoxy – Silane Hybrid
T = 20
B. Cross-Linking Density Effect
T = 30
T = 40
Si:Epoxy Resin weight ratio 1:1
T = 50
T = 60
Intensity (a.u.)
100
H3C
H3C
O
O
S
Si
H3C
O
S
O
S
S
O
Si
CH3
BS
O
CH3
CH3
Cohesive Healing Efficiency (%)
80
T = 70
T = 80
T = 90
o
C
o
C
o
C
o
C
o
C
o
C
o
C
o
C
Cross-Linking Density of
Inorganic Phase
60
40
500
20
1000
1500
2500
3000
3500
4000
-1
Raman Shift (cm )
0
0
APS
5
10
15
20
25
(T)
Time (Min.)
internal standard
100
80
Epikote 828
+
Ancamine 2500
+
Tetra-thiol
60
Cross-Linking Density of
Organic Phase
Peak Area(T) / Peak Area
Cohesive Healing Efficiency (%)
Aerospace Engineering
100
40
20
0
S-S
1,8
C=O
1,6
1,4
0,4
0,2
20
0
10
20
30
40
50
60
30
40
50
60
70
80
90
o
Temp. ( C)
Time (Min.)
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.