模拟深海环境中阴极极化电位对钛合金应力腐蚀敏感性的影响  

Effect of Cathodic Polarization Potential on Stress Corrosion Cracking Susceptibility of Titanium Alloys in Simulated Deep Sea Environment

作　　者：卢云飞[1] 段国庆 郭倩 石鹏飞 徐家劲 杨文山[1] LU Yunfei;DUAN Guoqing;GUO Qian;SHI Pengfei;XU Jiajing;YANG Wenshan(Wuhan Second Ship Design&Research Institute,Wuhan 430064,China)

机构地区：[1]武汉第二船舶设计研究所,武汉430064

出　　处：《腐蚀与防护》2022年第8期14-20,共7页Corrosion & Protection

摘　　要：通过电化学试验和慢应变速率试验研究了阴极极化电位对钛合金Ti80、Ti75和Ti31在模拟深海环境中应力腐蚀敏感性的影响。结果表明:随着阴极极化电位的负移,3种钛合金的应力腐蚀敏感性均呈现上升趋势,在模拟深海环境中,Ti80、Ti75和Ti31无明显应力腐蚀倾向的最负阴极极化电位(相对于Ag/AgCl电极)分别为-0.77V、-0.73V和-0.73V。The effect of cathodic polarization potential on stress corrosion cracking(SCC) susceptibility of titanium alloys Ti80, Ti75 and Ti31 in simulated deep sea environment was studied by electrochemical test and slow strain rate test(SSRT). The results show that the SCC susceptibility of Ti80, Ti75 and Ti31 all had a increasing tendency when the cathodic polarization potential shifted negatively. The most negative cathodic polarization potentials(relative to Ag/AgCl electrode) of Ti80, Ti75 and Ti31 without obvious stress corrosion tendency were-0.77 V,-0.73 V and-0.73 V, respectively, in simulated deep sea environment.

关 键 词：应力腐蚀开裂 深海 钛合金 慢应变速率试验(SSRT) 阴极极化 

分 类 号：TG172[金属学及工艺—金属表面处理]