Interfacial chemistry of organic conversion film on AZ61 magnesium alloy surface

被引：9
作者：
Yang, Xu [1 ,2 ]
Pan, Fusheng [1 ]
Zhang, Dingfei [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Third Mil Med Univ, Dept Chem, Chongqing 400038, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 05期
关键词：
Magnesium alloy; Electrochemical deposition; Organic conversion film; p-Nitro-benzene-azo-resorcinol; Corrosion inhibitor; Interfacial chemistry;
D O I：
10.1016/j.apsusc.2008.06.035
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The anodic electrochemical behavior of AZ61 magnesium alloy in sodium hydroxide medium in the absence and presence of p-nitro-benzene-azo-resorcinol (PNBAR) was studied using electrochemical techniques. In the presence of PNBAR, organic conversion film formed on the surface of magnesium alloy. The nature of chemical mechanisms, bonds, and structures at the interface of PNBAR/ magnesium alloy was investigated by using energy dispersive spectrometer (EDS) analysis and Fourier transform infrared spectroscopy. An in situ electrochemical deposition was evidenced to produce a corrosion protective barrier by the formation of organic conversion. lm of magnesium-PNBAR complex and to enhance. lm adhesion by the covalent bonds of Mg-O-N linkage. The linear sweep voltammetry experiments and the score tests were used to investigate the adhesion and evaluate the potential of corrosion resistance of organic conversion. lm. The results indicated the corrosion resistance of magnesium alloy was improved, the organic conversion. lm showed excellent adhesion not only to the substrate but also to the outer paint coatings. (C) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码：1782 / 1789
页数：8
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