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Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy
Zhang, Yingjun; Shao, Yawei; Meng, Guozhe; Zhang, Tao; Li, Ping; Wang, Fuhui; shaoyawei@hrbeu.edu.cn
2015
Source PublicationJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
ISSN1945-9645
Volume12Issue:4Pages:777-785
AbstractDefective epoxy varnish and hydrofluoric acid-doped polyaniline/epoxy (PANI-HF/EP) coatings were coated on the surface of an AZ91D magnesium alloy. The corrosion protection of the defective coatings was evaluated in 0.05 M NaCl by localized electrochemical impedance spectroscopy. Then, the surface of AZ91D magnesium alloy beneath the coating was analyzed by scanning electron microscopy- and energy dispersive X-ray spectroscopy. The results indicated that the defective epoxy varnish coating could not protect the magnesium alloy because it only served as an electrolyte barrier. By contrast, the PANI-HF/EP coating served not only as an electrolyte barrier, but also facilitated the formation of a protective layer by redox processes. Therefore, the defective PANI-HF/EP coating could protect magnesium alloy from corrosion.
description.department[zhang, yingjun ; li, ping] harbin engn univ, coll shipbldg engn, harbin 150001, peoples r china ; [zhang, yingjun ; shao, yawei ; meng, guozhe ; zhang, tao ; wang, fuhui] harbin engn univ, corros & protect lab, coll mat sci & chem engn, harbin 150001, peoples r china ; [shao, yawei ; meng, guozhe ; zhang, tao ; wang, fuhui] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china
KeywordPolyaniline Coating Magnesium Alloy Corrosion Leis
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74835
Collection中国科学院金属研究所
Corresponding Authorshaoyawei@hrbeu.edu.cn
Recommended Citation
GB/T 7714
Zhang, Yingjun,Shao, Yawei,Meng, Guozhe,et al. Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy[J]. JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH,2015,12(4):777-785.
APA Zhang, Yingjun.,Shao, Yawei.,Meng, Guozhe.,Zhang, Tao.,Li, Ping.,...&shaoyawei@hrbeu.edu.cn.(2015).Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy.JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH,12(4),777-785.
MLA Zhang, Yingjun,et al."Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy".JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH 12.4(2015):777-785.
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