期刊
PROGRESS IN ORGANIC COATINGS
卷 67, 期 1, 页码 12-19出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2009.09.008
关键词
Conducting paint; AZ31 Mg alloy; Electrochemical impedance spectroscopy; Corrosion
The paper deals with understanding the electrochemical impedance behavior of (a) chromate coating (b) electrically conducting polymer coating and (c) polyurethane coating under different combinations applied over AZ31 magnesium alloy in an effort to develop a conducting organic coating that can offer corrosion protection as well as electrical conductivity. The study indicates that dispersion of graphite in acrylic coating though significantly brings down the electrical resistance; application of such a coating on the magnesium alloy does not offer good resistance against corrosion. In order to gain both the corrosion resistance as well as electrical conductivity an intermediate coating such as polyurethane needs to be provided. The paper discusses the electrochemical impedance behavior of the above coatings. (C) 2009 Elsevier B.V. All rights reserved.
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