304不锈钢在盐湖卤水中的腐蚀行为  

Corrosion Behavior of 304 Stainless Steel in Saline Lake Brine

作　　者：董彩常[1] 杨朝晖[1] 张波[1] 胡艳丽[1] 

机构地区：[1]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071

出　　处：《材料保护》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

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.

关 键 词：电化学腐蚀 304不锈钢 盐湖卤水 点蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]