Cerium-Based Sealing Treatment of Mg-Al Hydrotalcite Film on AZ91D Magnesium Alloy

被引：16
作者：
Dong, Qiang-Sheng [1 ,2 ]
Ba, Zhi-Xin [1 ,2 ]
Wang, Zhang-Zhong [1 ,2 ]
Kuang, Juan [1 ]
Cai, Zheng-Yang [1 ]
Yuan, Chen [1 ]
机构：
[1] Nanjing Inst Technol, Sch Mat Sci & Engn, Nanjing 211167, Jiangsu, Peoples R China
[2] Jiangsu Key Lab Adv Struct Mat & Applicat Technol, Nanjing 211167, Jiangsu, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2016年 / 29卷 / 11期
关键词：
AZ91D magnesium alloy; Mg-Al hydrotalcite film; Sealing treatment; Ce-containing solution; Corrosion resistance; CORROSION-RESISTANCE; CONVERSION FILM; PHYTIC ACID; COATINGS; PRETREATMENT; MECHANISM; STANNATE; STRENGTH; BEHAVIOR; CHLORIDE;
D O I：
10.1007/s40195-016-0448-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
An environment-friendly cerium-based sealing treatment was developed to improve the surface integrity and corrosion resistance of Mg-Al hydrotalcite film on AZ91D magnesium alloy. The cerium dioxide was generated through three stages namely nucleation, growth and dissolution, modifying the surface of AZ91D Mg alloy, and the hydrotalcite film became integral after being treated for 30 min. The results of polarization curves showed that the anti-corrosive performance of the hydrotalcite film was enhanced by the sealing treatment. Moreover, the immersion tests and electro-chemical impedance spectrum measurements also demonstrated that the sealed hydrotalcite film provided a longer-term protection of magnesium alloy from corrosion as compared to the unsealed one.
引用
收藏
页码：993 / 1000
页数：8
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