Polyethylene ‍‍Coating with Improved Resistance to Cathodic Disbonding Using Surface Chemical Treatment with Organosilanes

Document Type : Research Paper

Authors

Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI)

Abstract

Two layer polyethylene coatings consisting of maleinated polyethylene primer and HDPE topcoat have been used for many years. In this research, in order to enhance adhesion and durability of the maleinated polyethylene layer, a kind of surface chemical treatment on substrate with organosilane materials has been used.
It is expected that by addition of silane chemical treatment to the application process of maleinated polyethylene coating, an improved product with coating properties at least equal to 3LPE (3 Layer polyethylene: epoxy/adhesive/polyethylene) can be obtained.
Therefore, adhesion of maleinated polyethylene layer to metal after chemical treatment with organosilans at different conditions was measured. Also, cathodic disbonding tests were conducted on samples whose metal substrate had previously been treated with organosilanes. Finally, the results of adhesion and cathodic disbonding tests for chemically treated and untreated coated panels were compared

Keywords

References

منابع
[1] Leiden L., Purmonen J., Leiden A. & Alastal K., Coated pipe comprising polyolefin layer with enhanced adhesion, EP patent: 1859926A1, 2007.
[2] Argent C., & Norman D., “Three layer polyolefin coatings: fulfilling their potential?”, Corrosion March 12-16, 2006, http://www.davidnormancorrosioncontrol. com/html/papers/PDF/DavidNormanNACE2006. pdf, Available online October 2010.
[3] Guoli L., Xueming W., Aiju L., Weiqiang W. & Liqiang Z., “Fabrication and adhesive properties of thin organosilane films coated on low carbon steel substrates”, Surface & Coatings Technol., Vol. 201, pp. 9571-9578, 2007.
[4] Ooji V., “On characterization and performance of silane coupling between organic coatings and metallic or ceramic substrates”, American Institute of Physics, pp. 305-321, 1996.
5- Borup B. & Loannidis A., Polypropylene maleic acid anhydride, and silanes: The winning combination, Dynasylane literatures, Evonick Industries Co., www.Dynasylane.com/page/en/literature/pageNumber/5-49k, 30.6. 2010.
[6] Harun M.K., Marsh J. & Lyon S.B., “The effect of surface modification on the cathodic disbondment rate of expoxy and alkyd coatings”, Prog. Org. Coatings, Vol. 54, pp. 317-321, 2005.
[7] Roy D., Simon G.P., Forsyth M. & Mardel J., “Modification of thermoplastic coatings for improved cathodic disbonment performance on a steel substrate: a study on failure mechanisms”, Inter. J. of Adhesion & Adhesives, Vol. 22, pp. 395-403, 2002.
[8] Roy D., Simon G. P. & Forsyth M., “Improved cathodic disbondment performance of polyethylene blends”, Polym. Eng. and Sci., Vol. 42, No. 4, pp. 781-788, 2002.
[9] Roy D., Simon G. P. & Forsyth M., “Blends of maleic-anhydride-grafted polyethylene with polyethylene for improved cathodic disbondment performance”, Polym. Inter., Vol. 50, pp. 1115-1123, 2001.
[10] Roy D., Simon G. P., Forsyth M. & Mardel J., “Toward a better understanding of the cathodic disbondment performance of polyethylene coatings on steel”, Advances in Polym. Technol., Vol. 21, No. 1, pp. 44-58, 2002.
[11] Matsugu M.O. & Chiaki K., “The effect of silane coupling agent treatment on the cathodic delamination of polyethylene-coated steel pipe”, J. of the Japan Soci. of Colour Material. Vol. 74, No. 5, pp. 217-222, 2001.
[12] Love C.T., Xian G. & Karbahari V.M., “Cathodic disbondment resistance with reactive ethylene terpolymer blend”, Prog. in Org. Coatings, Vol. 60, pp. 287-296, 2007.
[13] Fedel M., Olivier M., Poelman M., Deflorian F., Rossi S. & Druart M.E., “Corrosion protection properties of silane pre-treated powder coated galvanized steel”, Prog. in Org. Coatings, Vol. 66, pp. 118–128, 2009.
[14] Horner M.R. & Boerio F.J., “Cathodic delamination of an epoxy/polyamide coating from steel”, J. Adhesioin., Vol. 32, 141-156, 1990.
[15] Gaillard G. & Bouliez J.L., “Method for applying an anti-corrosion coating on parts of a duct including the use of a silane aqueous solution and an epoxy powdery paint”, U.S. Patent App. Pub.: 20100055327 A1, 2010.
[16] National Iranian Gas Company, http://igs.nigc.ir/igs/, Aveilable online October 2010.
Journal of Petroleum Research
Volume 21, Issue 67 - Serial Number 67
November and December 2011
Pages 30-38

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