15Cr超级马氏体不锈钢在不同环境中耐蚀性能的研究  

Corrosion Resistance of 15Cr Super Martensitic Stainless Steel under Different Environments

作　　者：刘全彬 孙希庆 李秋魁 张永 LIU Quan-bin;SUN Xi-qing;LI Qui-kui;ZHANG Yong(Hozon New Energy Automobile Co.,Ltd.,Tongxiang Zhejiang 314500,China)

机构地区：[1]合众新能源汽车有限公司,浙江桐乡314500

出　　处：《热处理技术与装备》2022年第4期10-15,共6页Heat Treatment Technology and Equipment

基　　金：辽宁“百千万人才工程”项目(辽人社函[2021]79号A类项目21号)。

摘　　要：采用动电位极化曲线和电化学阻抗谱方法研究了15Cr超级马氏体不锈钢在腐蚀环境中的耐蚀性能,分析了介质的pH值、Cl^(-)含量和CO_(2)对腐蚀电化学特性的影响。结果表明,随着Cl^(-)浓度的提高,钢的点蚀电位明显降低;在含有饱和CO_(2)的NaCl溶液中,钢的维钝电流密度较高,但点蚀电位也较正,不锈钢在含CO_(2)的腐蚀介质中会形成一层稳定的腐蚀产物膜;随着pH值的降低,不锈钢的耐蚀性能逐渐下降。The corrosion resistance of 15 Cr super martensitic stainless steel(SMSS) in corrosive environment was studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy(EIS).The effects of pH value, Cl^(-1) content and CO_(2)on the corrosion electrochemical characteristics were analyzed. The results showed that with the increase of Clconcentrationd, the pitting potential of stainless steel decreased obviously. In NaCl solution containing saturated CO_(2), the dimensional blunt current density of steel was higher, but the pitting potential was also more positive, and which stainless steel would formed a stable corrosion product film in the corrosion medium containing CO_(2). With the decrease of pH value, the corrosion resistance of stainless steel decreased gradually.

关 键 词：超级马氏体不锈钢 CO_(2) Cl^(-)浓度 PH值 

分 类 号：TG172.3[金属学及工艺—金属表面处理]