摘要
用腐蚀挂片试验方法研究了304不锈钢在盐湖卤水中暴露2 a的腐蚀行为,并运用室内电化学试验方法研究了其电化学行为。结果表明:盐湖卤水浸泡2 a后,304不锈钢腐蚀速率为0.000 3 mm/a,主要表现为点蚀,试样侧面加工缺陷处存在较深的点蚀坑;在卤水中浸泡768 h后,304不锈钢表面钝化膜局部被破坏,出现点蚀孔。
The corrosion behavior and electrochemical feature of 304 stainless steel in saline lake brine were studied by using outdoor exposure tests(up to 2 a of exposure) and indoor electrochemical test.It was found that the stainless steel exposed to field saline lake brine for 2 a had a corrosion rate of 0.000 3 mm/a.In this case,the corrosion process was dominated by pitting corrosion and deep pitting holes were formed at the side area with machined defects of the sample.After 768 h of indoor immersion in the same brine,the passivation film on the surface of the stainless steel was partly destructed leading to pitting holes.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第9期32-34,92,共3页
Materials Protection
基金
国家科技基础条件平台建设项目(2005DKA10400)资助
关键词
电化学腐蚀
304不锈钢
盐湖卤水
点蚀
electrochemical corrosion
304 stainless steel
saline lake brine
pitting
