Modifications of the hydrotalcite film on AZ31 Mg alloy by phytic acid: The effects on morphology, composition and corrosion resistance

被引：130

作者：

Chen, Jun ^{[1
]}

Song, Yingwei ^{[1
]}

Shan, Dayong ^{[1
]}

Han, En-Hou ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China

来源：

CORROSION SCIENCE | 2013年 / 74卷

基金：

中国国家自然科学基金; 对外科技合作项目（国际科技项目）;

关键词：

Magnesium; IR spectroscopy; XRD; EIS; Repassivation; LAYERED DOUBLE HYDROXIDES; CONVERSION COATINGS; ANION-EXCHANGE; CARBONATE IONS; DEINTERCALATION; DELAMINATION; PERFORMANCE; SURFACE; GROWTH; SALT;

D O I：

10.1016/j.corsci.2013.04.034

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

An environmentally friendly corrosion inhibitor phytic acid (PA) has been successfully added to modify the hydrotalcite (HT) film by adsorption and ion exchange approaches. In alkali PA solution, PO43- cannot substitute CO32- in the HT, but adsorb to the external surface; H2PO4-/HPO42- can insert into the HT after decarbonation under acidic condition. Partial decomposition occurs under both conditions. The PA/pH 11-HT film shows superior stability and lasting protective efficiency, and also can provide self-healing effect associated with the P adsorption in the filament. The worse resistance of the PA/pH 6.5-HT film may be related to the micro-cracks. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：130 / 138

页数：9

共 53 条

[1]

Synthesis and characterization of Mg-Fe layer double hydroxides and its application on adsorption of Orange G from aqueous solution [J].