典型不锈钢在淡化海水中的耐腐蚀性能研究  

Corrosion Resistance of Stainless Steel in Desalinated Seawater

作　　者：李超[1,2] 吴恒[1,2] 张波[1,2] 盖德胜 LI Chao WU Heng ZHANG Bo GAI De-sheng(Qingdao NCS Testing ＆ Corrosion Protection Technology Co., Ltd., Qingdao 266071, China Qingdao Research Institute four Marine Corrosion, Central Institute for Iron and Steel, Qingdao 266071, China)

机构地区：[1]青岛钢研纳克检测防护技术有限公司,山东青岛266071 [2]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071

出　　处：《装备环境工程》2017年第2期67-71,共5页Equipment Environmental Engineering

摘　　要：目的研究316L和2205在淡化海水中的耐腐蚀性能,并研究水处理药剂对不锈钢耐蚀性的影响。方法采用电化学试验、慢应变速率拉伸试验、扫描电镜等方法。结果在淡化海水中,316L临界点蚀温度为42.7℃,加入药剂后为70.2℃;2205的临界点蚀温度大于85℃。2205耐缝隙腐蚀性能明显好于316L,药剂对2205也具有一定的缓蚀作用。316L和2205在50℃淡化海水中具有高应力腐蚀抗力。结论 316L不适合直接在淡化海水中应用,但适合在加入药剂的淡化海水中使用;2205适合在淡化海水中应用。Objective To study the corrosion resistance of 316L and 2205 stainless steel in desalinated seawater and explore influences of water treatment agentia on corrosion resistance of stainless steel. Methods Electrochemical test, slow strain rate tensile test, SEM, etc. were adopted. Results The critical pitting temperature of 316L in desalinated sea- water was 42.7 ℃. It was 70.2 ℃ after agentia was added; the critical pitting temperature of 2205 was higher than 85 ℃. The crevice corrosion resistance property of 2205 was better than 316L. The agentia also had corrosion inhibition effect on 2205. Both 316L and 2205 had high stress corrosion resistance in desalinated seawater at 50℃. Conclusion 316L is not suitable to be used in desalinated seawater directly, but is suitable to be used in desalinated seawater with agentia; 2205 is suitable to be used in desalinated seawater.

关 键 词：淡化海水 不锈钢 点蚀 缝隙腐蚀 应力腐蚀 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术] TG172.5[金属学及工艺—金属表面处理]