期刊
PROGRESS IN ORGANIC COATINGS
卷 76, 期 5, 页码 804-811出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2013.01.008
关键词
Polyaniline; Magnesium alloy; Corrosion protection; EIS
Epoxy coatings containing polyaniline (PANI) and polyaniline/organophilic montmorillonite (PANI/OMMT) powders were prepared on the surface of AZ91D magnesium alloy. The corrosion performance of the coatings was evaluated by electrochemical impedance spectroscopy (EIS) and open-circuit potential analysis in 3.5% NaCl. The results indicate that the PANI/OMMT coating retained its high corrosion protection for AZ91D magnesium alloy after 6000 h of immersion. The protective mechanism conferred by the PANI/OMMT coating was also discussed. The effects of oxygen on the protective mechanism of PANI were evaluated by EIS measurements in a 3.5% deaerated NaCl solution. (C) 2013 Elsevier B.V. All rights reserved.
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