Effects of lanthanum on the microstructure, electrochemical behavior, and anti-corrosion properties of zinc-copper-titanium alloy in 3% sodium chloride solution

被引：5

作者：

Ji, S. Y. ^{[1
,2
]}

Liang, S. H. ^{[1
]}

Song, K. X. ^{[3
]}

Li, H. X. ^{[3
]}

Li, Z. ^{[4
]}

机构：

[1] Xian Univ Technol, Fac Mat Sci & Engn, Xian 710048, Peoples R China

[2] Henan Inst Technol, Dept Mat Engn, Xinxiang 453003, Peoples R China

[3] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China

[4] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2017年 / 68卷 / 04期

基金：

中国国家自然科学基金;

关键词：

AZ91 MAGNESIUM ALLOY; CORROSION-RESISTANCE; PROTECTIVE ABILITY; NACL SOLUTION; CERIUM; COATINGS; EIS; FILMS;

D O I：

10.1002/maco.201609159

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SEM analysis shows that trace amounts of La in Zn-Cu-Ti alloy can eliminate dendritic segregation and produce uniform organization. Analyses of Tafel polarization curves and EIS show that La can obviously improve the corrosion resistance of Zn-Cu-Ti alloy by two features: (i) La oxide film has strong barrier properties; (ii) with an increase in La content, the thick skeletal dendrite epsilon(primary crystal) phase disappears and the more refined and dispersed epsilon(II) phase is generated, leading to a decrease in the active cathode area. Zn-Cu-Ti-0.5La alloy has the best corrosion resistance. The corrosion of the investigated alloys is mainly selective.

引用

页码：458 / 467

页数：10