Corrosion behavior of 2099 Al-Li alloy in NaCl aqueous solution

被引：12

作者：

Chen, Bin ^{[1
]}

Li, Chao-Hao ^{[1
]}

He, Shi-Chen ^{[1
]}

Li, Xiao-ling ^{[1
]}

Lu, Chen ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2014年 / 29卷 / 12期

关键词：

CU-MG ALLOYS; PITTING CORROSION; ELECTROCHEMICAL-BEHAVIOR; ALUMINUM-ALLOY; AEROSPACE; FILMS;

D O I：

10.1557/jmr.2014.121

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion behavior of 2099 Al-Li alloy in NaCl aqueous solutions with different concentrations (1.5, 3.5, and 5.0% in mass fraction) was investigated. Its corrosion resistance was evaluated using electrochemical measurements together with full immersion tests. The results showed that the 2099 Al-Li alloy possessed good corrosion resistance in NaCl aqueous solutions. Its corrosion rate increased with increasing chloride ion concentration. The main form of corrosion failure was pitting corrosion. The impurity containing sulfur leads to surface pitting. The oxide films that formed during the manufacturing process offer a good resistance to corrosion. They are likely to suffer separation, cracking, and drop-off when immersed in aggressive NaCl aqueous solution. The good corrosion susceptibility of the alloy may be attributed to homogeneous coherent nanoscale precipitates.

引用

页码：1344 / 1353

页数：10

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