Mechanisms of degradation of organic coatings

T. Prošek

doi:10.1515/kom-2017-0019

Abstract

An overview of protection mechanisms of organic coatings for metallic constructions and products is given. The barrier effect of coatings and protection in local defects are discussed. Basic degradation mechanisms of organic coatings such as anodic and cathodic delamination in vicinity of defects, osmotic and cathodic blistering, mechanical stress assisted blistering, loss of adhesion and chalking are described. Appropriate laboratory tests are proposed for each degradation mode.

References

1. G. P. Bierwagen: Reflections on corrosion control by organic coatings, Progress in Organic Coatings 1996, 28, 43-48.10.1016/0300-9440(95)00588-9
Search in Google Scholar Back to article
2. N. L. Thomas: The barrier properties of paint coatings, Progress in Organic Coatings 1991, 19, 101-121.10.1016/0033-0655(91)80001-Y
Open DOI Search in Google Scholar Back to article
3. N. S. Sangaj, V. C. Malshe: Permeability of polymers in protective organic coatings, Progress in Organic Coatings 2004, 50, 28-39.10.1016/j.porgcoat.2003.09.015
Open DOI Search in Google Scholar Back to article
4. J. E. O. Mayne: The mechanism of inhibition of the corrosion of iron and steel by means of paint, Official Digest 1952, 24, 127.
Search in Google Scholar Back to article
5. W. Funke, H. Haagen: Prediction of the corrosion protective properties of paint films by permeability data, Journal of Oil Colour Chemical Association 1975, 58, 359.
Search in Google Scholar Back to article
6. M. Stratmann, R. Feser, A. Leng: Corrosion protection by organic films, Electrochim. Acta 1994, 39, 1207-1211.10.1016/0013-4686(94)E0038-2
Search in Google Scholar Back to article
7. T. Prošek, D. Thierry: A model for the release of chromate from organic coatings, Progress in Organic Coatings 2004, 49, 209-217.10.1016/j.porgcoat.2003.09.012
Search in Google Scholar Back to article
8. T. Prošek, D. Thierry: Mobility and mode of inhibition of chromate at defected areas of organic coatings at atmospheric conditions, Corrosion 2004, 60, 1122-1133.10.5006/1.3299226
Search in Google Scholar Back to article
9. T. Prošek, D. Thierry, M. Olsson, U. Bexell: The Effect of Chloride to Chromate Ratio on the Protective Action of Zinc Surface Films under Atmospheric Weathering Conditions, Corrosion 2007, 63, 258-267.10.5006/1.3278350
Open DOI Search in Google Scholar Back to article
10. A. Nazarov, D. Thierry, T. Prošek, N. Le Bozec: Protective Action of Vanadate at Defected Areas of Organic Coatings on Zinc, Journal of Electrochemical Society 2005, 152, B220-B227.10.1149/1.1924067
Search in Google Scholar Back to article
11. T. Prošek: Konverzní a organické povlaky s chromem v oxidačním stavu VI a jejich alternativy, Koroze a ochrana materiálu 2005, 49, 27-33.
Search in Google Scholar Back to article
12. T. Hájková, A. Kalendová: Antikorozní vlastnosti pigmentů na základě molybdenanů a wolframanů modifikovaných vodivými polymery, Koroze a ochrana materiálů 2017, 61, 7-18.10.1515/kom-2017-0001
Search in Google Scholar Back to article
13. T. Prošek, A. Nazarov, A. Le Gac, D. Thierry: Coil-coated Zn-Mg and Zn-Al-Mg: Effect of climatic parameters on the corrosion at cut edges, Progress in Organic Coatings 2015, 83, 26-35.10.1016/j.porgcoat.2015.01.023
Search in Google Scholar Back to article
14. T. Prošek, A. Nazarov, H. B. Xue, S. V. Lamaka, D. Thierry: Role of steel and zinc coating thickness in cut edge corrosion of coil coated materials in atmospheric weathering conditions; Part 1: Laboratory study, Progress in Organic Coatings 2016, 99, 356-364.
Search in Google Scholar Back to article
15. T. Prošek, A. Nazarov, D. Thierry: Role of steel and zinc coating thickness in cut edge corrosion of coil coated materials in atmospheric weathering conditions; Part 2: Field data and model, Progress in Organic Coatings 2016, 101, 45-50.
Search in Google Scholar Back to article
16. W. Fuberth, M. Stratmann: The delamination of polymeric coatings from electrogalvanized steel - a mechanistic aspect, Corrosion Science 2001, 43, 229-241.10.1016/S0010-938X(00)00048-2
Search in Google Scholar Back to article
17. A. Tahara, T. Shinohara: Morphology of corrosion products formed by edge corrosion of residual coated steel sheets, Proc. of Galvatech ’07, 7th International Conference on Zinc and Zinc Alloy Coated Steel Sheet, Osaka, Japan, November 18-22, 2007.
Search in Google Scholar Back to article
18. T. Prošek: Urychlené cyklické korozní zkoušky, Koroze a ochrana materiálu 2016, 60, 46-49.10.1515/kom-2016-0008
Search in Google Scholar Back to article
19. R. M. Souto, D. J. Scantlebury: Cathodic delamination of coil coatings produced with different Zn-based intermediate metallic layers, Progress in Organic Coatings 2005, 53, 63-70.10.1016/j.porgcoat.2005.01.008
Search in Google Scholar Back to article
20. J. M. Pommersheim, T. Nguyen: Prediction of blistering in coating systems, ACS Symposium Series 689 (Organic Coatings for Corrosion Control), 137-150, 1998.10.1021/bk-1998-0689.ch011
Search in Google Scholar Back to article
21. T. N. Nguyen, J. B. Hubbard, G. B. McFadden: A mathematical model for the cathodic blistering of organic coatings on steel immersed in electrolytes, Journal of Coatings Technology 1991, 63 (794), 43-52.
Search in Google Scholar Back to article
22. T. Prošek, A. Nazarov, M.-G. Olivier, C. Vandermiers, D. Koberg, D. Thierry: The role of stress and topcoat properties in blistering of coil-coated materials, Progress in Organic Coatings 2010, 68, 328-333.10.1016/j.porgcoat.2010.03.003
Search in Google Scholar Back to article
23. A. Nazarov, T. Prošek, D. Thierry: Application of EIS and SKP for study of metal/polymer interface, Electrochimica Acta 2008, 53, 7531-7538.10.1016/j.electacta.2007.11.053
Search in Google Scholar Back to article
24. T. Prošek, A. Nazarov, J. Stoulil, D. Thierry: Evaluation of the tendency of coil-coated materials to blistering: Field exposure, accelerated tests and electrochemical measurements, Corrosion Science 2012, 61, 92-100.10.1016/j.corsci.2012.04.026
Search in Google Scholar Back to article
25. K. Kreislová, A. Koukalová, D. Knotková: Trendy korozní agresivity atmosféry a korozních úbytků zinku v atmosférických podmínkách, Koroze a ochrana materiálů 2011, 55, 19-22.
Search in Google Scholar Back to article

Mechanisms of degradation of organic coatings

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