SO_4^(2-)对316L不锈钢在含氯循环水中腐蚀的影响  

The Influence of SO_4^(2-) on Corrosion of 316L Stainless Steel in Circulating Cooling Water with Cl^-

作　　者：胡艳华[1] 郦和生[1] 谢文州[1] 杨玉[1] 

机构地区：[1]中国石油化工股份有限公司北京北化院燕山分院,北京市102500

出　　处：《石化技术》2013年第4期1-4,共4页Petrochemical Industry Technology

摘　　要：采用电化学法、扫描电子显微镜和能谱分析法研究了SO42-对316 L不锈钢在含氯循环水中腐蚀的影响。动电位扫描实验结果表明,SO42-在Cl-质量浓度低时可有效抑制点蚀,而在Cl-质量浓度高时不能有效抑制点蚀。扫描电子显微镜和能谱分析结果佐证了这一论点,在Cl-质量浓度较高时,SO42-对Cl-的排斥力已经不足以阻止Cl-在不锈钢表面的吸附,此时SO42-不能有效抑制Cl-的腐蚀作用。The inlluence of SO4^2- on corrosion of 316 stainless steel in circulating cooling water with CI-is studied by electrochemistry, scanning electron microscope（SEM） and energy dispersive spectrometry （El）S）. The resuhs of dynamic potential scanning show that the pitting corrosion is inhibited effectively by SO4^2-in solution of Cl- with low mass concentration, but the effect will disappear in high C1- solution. The results of SEM and EDS are evidenced that when the concentration of Cl- is high, repulsion of SO4^2- to Cl- is not enough to prevent the CI- from adsorbing on surface of the stainless steel and resulted in the corrosion of C1- not inhibited by SO4^2-.

关 键 词：循环水 不锈钢 点蚀 硫酸根离子 

分 类 号：TG142.71[一般工业技术—材料科学与工程]