机械科学与技术2024，Vol.43Issue(6)：1084-1091,8.DOI:10.13433/j.cnki.1003-8728.20230001
控氮型不锈钢316LN在含氯介质中的点蚀行为
Pitting Corrosion Resistance of 316LN Stainless Steel in Chlorine-containing Aqueous Solution
摘要
Abstract
In view of the current situation that the influence of N element on the pitting corrosion resistance of austenitic stainless steel and its mechanism are not clear,the mechanical properties and electrochemical impedance spectroscopy of nitrogen controlled stainless steel 316LN are tested.The results showed that the mechanical properties and corrosion resistance of 316LN at room temperature were superior to those of 316L stainless steel,but the corrosion resistance of 316LN stainless steel was degraded significantly with the increasing of temperature and medium concentration.At room temperature and low concentration of chloride ion,the impedance of the passivation film on 316LN stainless steel is higher than that of 316L stainless steel,which indicated that the stability of the passivation film on 316LN stainless steel is higher than that of 316L stainless steel under the synergistic effect among N,Cr and Mo.Meanwhile,the conversion products of NH4+or NO3-from N element can effectively inhibit the formation of secondary corrosion pits in 316LN stainless steel and avoid rapid propagation of corrosion pits in depth.关键词
316LN不锈钢/N元素/点蚀/电化学阻抗谱Key words
316LN stainless steel/N element/pitting corrosion/electrochemical impedance spectroscopy分类
矿业与冶金引用本文复制引用
华晓春,黄国辉,左竞成,赵丽,饶思贤..控氮型不锈钢316LN在含氯介质中的点蚀行为[J].机械科学与技术,2024,43(6):1084-1091,8.基金项目
国家科技部国家高技术研究发展计划(2012AA040103)、安徽省科技厅自然科学基金面上项目(1908085ME148)及安徽省教育厅自然科学重大研究项目(KJ2016SD09) （2012AA040103）
