理化检验-物理分册2025，Vol.61Issue(7)：6-10,5.DOI:10.11973/lhjy-wl240096
316L不锈钢临界点蚀温度的测量及校准
Measurement and calibration of critical pitting temperature of 316L stainless steel
宫彦双 1张卫朋 1柳楠 1陈庆国 1秦振杰 1陈梦婷 2卢雪梅2
作者信息
- 1. 塔里木油田公司油气工程研究院,库尔勒 841000
- 2. 机械工业上海蓝亚石化设备检测所有限公司,上海 201613
- 折叠
摘要
Abstract
The critical pitting temperature(CPT)of 316L stainless steel in Cl-solution was measured by electrochemical potentiostatic polarization curve method.The results of electrochemical potentiostatic polarization curve method were calibrated by immersion method to determine the specific value of CPT.The accuracy of CPT was further verified by optical microscope.The results show that the CPT of 316L stainless steel base metal was 58℃and 38℃in the solution with Cl-mass fraction of 0.01,0.05 and 0.1,respectively.When the Cl-mass fraction was greater than 0.1,the CPT was less than 22℃.After soaking the 316L stainless steel sample at this temperature for 24 h,it was found that the metastable rust spot had obvious pitting core.The solution temperature was reduced by 10℃,and then the sample was soaked.There was no obvious pitting core.The temperature could be used to determine the CPT of 316L stainless steel in the solution with Cl-mass fraction of 0.01,0.05,0.1.关键词
316L不锈钢/临界点蚀温度/恒电位极化曲线/浸泡法/锈斑Key words
316L stainless steel/critical pitting temperature/potentiostatic polarization curve/soaking method/rust spot分类
通用工业技术引用本文复制引用
宫彦双,张卫朋,柳楠,陈庆国,秦振杰,陈梦婷,卢雪梅..316L不锈钢临界点蚀温度的测量及校准[J].理化检验-物理分册,2025,61(7):6-10,5.
