Polyoxadiazole-based coating for corrosion protection of magnesium alloy

Mathan, M. Bobby, Gomes, D., Dietzel, W., and Abetz, V. (2008) Polyoxadiazole-based coating for corrosion protection of magnesium alloy. Surface & Coatings Technology, 202 (19). pp. 4598-4601.

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In this study, polyoxadiazole-based coatings were molecularly designed by attaching two different functional groups, i.e., diphenyl-ether and diphenyl-hexafluoropropane, in the main polymer chain for the purpose of low water permeability and eventually for high corrosion protection of AM50 magnesium alloy. Potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) were used to evaluate the coating performance of the two polymers. Electrochemical experiments showed that POD-6FP (poly(4,4′-diphenyl-hexafluoropropane-1,3,4-oxadiazole)) coated alloy exhibited 3–4 orders of magnitude higher corrosion resistance as compared to the POD-DPE (poly (4,4′-diphenyl-ether-1,3,4-oxadiazole)) coated alloy. The high coating performance of the POD-6FP polymer can be attributed to the hydrophobic group attached to the polyoxadiazole chain.

Item ID: 9562
Item Type: Article (Research - C1)
ISSN: 0257-8972
Keywords: polyoxadiazole; coating; corrosion; magnesium alloys
Date Deposited: 12 May 2010 01:27
FoR Codes: 09 ENGINEERING > 0912 Materials Engineering > 091209 Polymers and Plastics @ 100%
SEO Codes: 86 MANUFACTURING > 8612 Fabricated Metal Products > 861201 Coated Metal and Metal-Coated Products @ 100%
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