Investigation of the surface modification of magnesium particles with stannate on the corrosion resistance of a Mg-rich epoxy coating on AZ91D magnesium alloy

被引：18
作者：
Xu, Pengfei [1 ,2 ]
Lu, Xiangyu [1 ,2 ]
Cheng, Hongxia [1 ,2 ]
Feng, Xingguo [1 ,2 ]
Zhao, Zuopeng [1 ,2 ]
Ding, Yanxu [2 ]
Shen, Yalin [2 ]
Shi, Xingling [3 ]
机构：
[1] Hohai Univ, Minist Educ, Key Lab Coastal Disaster & Def, Nanjing 210098, Jiangsu, Peoples R China
[2] Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing 210098, Jiangsu, Peoples R China
[3] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China
来源：
PROGRESS IN ORGANIC COATINGS | 2019年 / 135卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Mg-rich primer; Stannate; Corrosion; EIS; PROTECTIVE PERFORMANCE; CONVERSION COATINGS; NACL SOLUTION; COATED STEEL; BEHAVIOR; PRIMER; WATER; PAINT; POLYANILINE; ADHESION;
D O I：
10.1016/j.porgcoat.2019.06.050
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A stannate bath was used to pretreat Mg particles in an Mg-rich primer (MRP) coated on the AZ91D magnesium alloy. The duration of the stannate treatment and its effects on the MRP were investigated. After about 20 min of stannate treatment, a protective film of Mg stannate was formed on the surface of the Mg particles and could decrease the corrosion rate of pure Mg. In the first stage, the Mg stannate film reduced the reaction rate of pure Mg particles, prolonging the lifetime of the MRP. In addition, the stannate treatment caused the formation of compact corrosion products in the MRP, improving the barrier effect of the primer. Finally, a protective film consisting of Mg stannate was formed on the AZ91D substrate. The protective film could reduce the corrosion rate of the AZ91D alloy, improving the protective performance of the MRP.
引用
收藏
页码：591 / 600
页数：10
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