摘要
奥氏体-铁素体双相不锈钢在300~1 000℃范围内会在晶界、相界及其周边区域析出σ相、χ相、R相、碳化物及氮化物等第二相,并导致晶界或析出相周边形成贫铬区,在特定环境下具有一定的晶间腐蚀敏感性,需在试验室进行准确测定。概述了奥氏体-铁素体双相不锈钢的试验室晶间腐蚀试验方法,包括化学浸泡法和电化学方法,并提出了试验中需要注意的问题,为腐蚀测试工作者提供参考。
Precipitation of detrimental secondary phases such as σ, χ, R phase, chromium carbides and nitrides will inevitably occur at the grain boundary, phase boundary and its surrounding areas at 300~1 000 ℃ which leads to the formation of Cr depleted zones around grain boundary and precipitation of austenite-ferrite duplex stainless steel. This may seriously deteriorate the intergranular corrosion of the austenitic-ferrite duplex stainless steel in specific environment, so it needs to be accurately measured in the laboratory. The laboratory intergranular corrosion test methods of the austenite-ferrite duplex stainless steel were summarized, including chemical immersion method and electrochemical method. The problems needing attention in the test were put forward, which provided reference for corrosion testers.
作者
罗先甫
张文利
翟智梁
张恒坤
查小琴
刘晓勇
LUO Xianfu;ZHANG Wenli;ZHAI Zhiliang;ZHANG Hengkun;ZHA Xiaoqin;LIU Xiaoyong(Luoyang Ship Material Research Institute,Luoyang 471023,China)
出处
《理化检验（物理分册）》
CAS
2021年第8期1-10,共10页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
国家重点研发计划项目(2016YFC0401205)。
关键词
奥氏体-铁素体双相不锈钢
晶间腐蚀
化学浸泡
电化学
austenitic-ferrite duplex stainless steel
intergranular corrosion
chemical immersion
electrochemistry
