摘要
采用循环极化、微生物分析法、扫描电镜及表面能谱分析等方法,研究了磁场对316L不锈钢在含硫酸盐还原菌(SRB)的土壤模拟溶液中的腐蚀行为。结果表明,磁场可以抑制SRB的生长;未外加磁场时316L不锈钢表面膜层以局部堆积为主,加有磁场时,局部堆积明显减小,膜层均匀致密的排列于基体表面;无论有或没有外加磁场,316L不锈钢表面均发生钝化膜破裂型点蚀,未外加磁场时的点蚀电位低于加有磁场时的。在相同的浸泡时间,未外加磁场时循环极化滞后环面积明显比加有磁场时的大,说明磁场可以有效抑制316L不锈钢点蚀的形成与发展,降低316L不锈钢的点蚀诱发能力。
The common corrosion behavior of 316 L stainless steel is pitting corrosion. In this work,the electrochemical cycle polarization test,microbiological analysis,surface morphology and energy spectrum analysis were used to investigate the influence of magnetic field on the corrosion of 316 L stainless steel in soil simulated solution containing SRB. The results showed that apply of magnetic field can inhibit the growth of SRB. There were local accumulation on surface film of 316 L stainless steel without magnetic field,and the surface film uniformly arranges on the surface of substrate when applying magnetic field and the local accumulation areas decrease significantly. The pitting corrosion behaviors of 316 L stainless steel in soil solution were both film rupture with or without magnetic fields and the pitting potential without applying magnetic field is lower than that of with magnetic field. Under the same immersion time,the area of lap ring with applying magnetic field is smaller than that of without applying magnetic field. The presence of magnetic field can effectively inhibit the formation and development of the pitting corrosion of 316 L stainless steel and reduce the ability of induce pitting.
出处
《化学通报》
CAS
CSCD
北大核心
2016年第4期332-337,共6页
Chemistry
基金
国家自然科学基金项目(51574147)
辽宁省教育厅重点实验室基础研究项目(LZ2014027)资助
关键词
磁场
循环极化
硫酸盐还原菌
点蚀
Magnetic field
Cycle polarization
Microbiologically-influenced corrosion
Pitting corrosion
作者简介
王海燕 女，28岁，硕士生，主要从事金属材料的腐蚀与防护研究。
联系人，吴明 男，教授。E-mail：wuming0413@163．com
