摘要
采用点蚀电位测量法和扫描电镜研究了钛元素添加对低铬铁素体不锈钢电化学腐蚀性能的影响,结果表明：少量钛元素添加可以使不锈钢中的夹杂物更加弥散,分布更均匀,从而显著提高其耐腐蚀性能;但随着钛含量超过0.029%,第二相点蚀源增加,反而降低了不锈钢的耐腐蚀性能;适量的钛元素有助于消除间隙原子,减小晶界偏聚,从而改善材料耐腐蚀性能。
Influence of Ti on the electrochemical corrosion resistance of ferritic stainless steel was investigated by means of pitting potential measurement and scanning electron microscopy. The results show that the corrosion resistance of ferritic stainless steel is obviously improved by the addition of Ti,which makes inclusions in the steel more dispersive and more uniformly distributed. But with increasing amount of Ti（above 0. 029%）,it is also observed that the pitting sources increase caused by secondary phases,which play a negative role in corrosion resistance. The interstitial atoms and grain boundary segregation can be reduced by the optimum amount of Ti,so that the corrosion resistance of the stainless steel is improved.
作者
陈虎
王杜
沈正祥
陈定岳
袁书强
Chen Hu;Wang Ou;Shen Zhengxiang;Chen Dingyue;Yuan Shuqiang(Ningbo Special Equipment Inspection and Research Institute, Ningbo Zhejiang 315048, China;Ningbo Branch of Inner Mongolia Metal Materials Institute, Ningbo Zhejiang 315103, China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第6期11-15,共5页
Heat Treatment of Metals
基金
浙江省质量技术基础建设项目(20180119)
关键词
铁素体不锈钢
钛
点蚀
极化曲线
耐蚀性
ferritic stainless steel
titanium
pitting corrosion
polarization curve
corrosion resistance
