Molybdate/phosphate composite conversion coating on magnesium alloy surface for corrosion protection

被引：149

作者：

Yong, Zhiyi ^{[1
]}

Zhu, Jin ^{[1
]}

Qiu, Cheng ^{[1
]}

Liu, Yali ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 05期

关键词：

Magnesium alloy; Molybdate; Molybdate/phosphate; Conversion coating;

D O I：

10.1016/j.apsusc.2008.04.095

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：

In this paper, a new conversion coating-molybdate/phosphate (Mo/P) coating on magnesium alloy was prepared and investigated by electrochemical impedance spectra (EIS), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and salt-water immersion experiments, respectively. The results demonstrated that the Mo/P coating contained composite phases, which were consisted of metaphosphate as well as molybdate oxide with an "alveolate-crystallized'' structure. The composite Mo/P conversion coating had better corrosion resistance performance than molybdate (Mo) coating, and even had almost comparable corrosion protection for Mg alloy to the traditional chromate-based coating. (C) 2008 Published by Elsevier B. V.

引用

页码：1672 / 1680

页数：9

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