The effect of nitrate on the corrosion behavior of 7075-T651 aluminum alloy in the acidic NaCl solution

被引：11
作者：
Liu, Xiaohang [1 ]
Li, Yizhou [1 ]
Lei, Li [1 ]
Wang, Xin [1 ]
机构：
[1] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2021年 / 72卷 / 09期
基金：
中国国家自然科学基金;
关键词：
aluminum; acid solutions; pitting corrosion; SEM; INTERGRANULAR CORROSION; LOCALIZED CORROSION; PITTING CORROSION; PURE ALUMINUM; CARBON-STEEL; INHIBITION; SULFATE; SEAWATER; IONS;
D O I：
10.1002/maco.202112280
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of nitrate on the corrosion behavior of 7075-T651 aluminum alloy in an acidic NaCl solution is investigated by electrochemical investigation and morphology characterization. Localized corrosion initiated from intermetallic particles could be observed in the solution with and without NaNO3. The nitrate plays a controversial role in the corrosion of 7075-T651 aluminum alloy. It could enhance the performance of passive film and reduce the probability of pitting corrosion initiation. However, the pitting corrosion would be promoted by nitrate, once stable pitting corrosion is initiated.
引用
收藏
页码：1478 / 1487
页数：10
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