Phosphating process of AZ31 magnesium alloy and corrosion resistance of coatings

被引：37

作者：

Cheng, Ying-liang ^{[1
]}

Wu, Hai-lan ^{[1
]}

Chen, Zhen-hua ^{[1
]}

Wang, Hui-min ^{[1
]}

Li, Ling-ling ^{[1
]}

机构：

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

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2006年 / 16卷 / 05期

关键词：

AZ31 magnesium alloy; phosphating; corrosion; electrochemical impedance spectroscopy; potentiodynamic polarization;

D O I：

10.1016/S1003-6326(06)60382-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 [冶金工程];

摘要：

Zinc phosphate films were formed on AZ31 magnesium alloy by immersing into a phosphatation bath to enhance the corrosion resistance of AZ31. Different films were prepared by changing the processing parameters such as immersing time and temperature. The corrosion protection of the coatings was studied by electrochemical measurements such as electrochemical impedance spectroscopy, potentiodynamic polarization curves, and the structure of the films were studied by metalloscopy and X-ray difIraction (XRD). The results show that, the film formed at 80 degrees C, 10 min has the highest corrosion resistance. The XRD patterns show that the film consists of hopeite (Zn-3(PO4)(2) center dot xH(2)O).

引用

收藏

页码：1086 / 1091

页数：6

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