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OALib Journal期刊
ISSN: 2333-9721
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工业纯Ti在模拟高放废物地质处置环境中的缝隙腐蚀行为
DOI: 10.3724/SP.J.1037.2013.00090, PP. 675-681
Keywords: 高放废物,Ti,缝隙腐蚀,温度
Abstract:
采用动电位极化曲线、电化学阻抗谱、电偶电流监测及恒电位极化等电化学方法研究了温度和Cl-浓度对Grade-2Ti在模拟高放废物处置环境中缝隙腐蚀行为的影响.结果表明,浸泡初期,带缝隙Ti电极在25-95℃时均呈现钝化特征.随浸泡时间延长,缝隙内介质环境侵蚀性增强,诱发Ti缝隙腐蚀.随着温度的升高和Cl-浓度的增加,电偶电流增大,Ti的耐缝隙腐蚀性能下降.Ti缝隙腐蚀各阶段转变的临界温度随着Cl-浓度和外加电位的增加而降低.由于发生阳极活性溶解,缝隙口处金属被严重破坏.
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