An investigation of the effect of a magnetic field on the phosphate conversion coating formed on magnesium alloy

被引：17
作者：
Zhao, Ming [1 ]
Li, Jianguo [2 ]
He, Guangping [1 ]
Xie, Honglan [3 ]
Fu, Yanan [3 ]
机构：
[1] North China Univ Technol, Coll Mech & Elect Engn, Beijing 100144, Peoples R China
[2] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[3] Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 215600, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2013年 / 282卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Phosphate conversion coating; Mg2+ cation; Hydrogen bubble; Magnetic field; CORROSION; ELECTRODEPOSITION; SURFACE; MG;
D O I：
10.1016/j.apsusc.2013.06.001
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, the influence of the magnetic field on the phosphate conversion coating formed on magnesium alloy has been studied by scanning ion selective electrode technique (SIET), X-rays phase-contrast radiography, scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results show that the superposition of a magnetic field during the phosphate conversion coating process can promote the generation of small hydrogen gas bubbles and accelerate their desorption. In addition, irrespective of the microstructure of the AZ91D magnesium alloy, it was found that the Mg2+ cations were distributed comparatively uniformly. A uniform smooth phosphate conversion coating could be obtained by immersion in the treatment solution when a magnetic field was applied perpendicular to the magnesium alloy. It may be expected to use magnetic field to control the formation of phosphate conversion coating on magnesium alloy. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：499 / 505
页数：7
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