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材料工程  2014 

304不锈钢与Sn作用后腐蚀性能评价

DOI: 10.3969/j.issn.1001-4381.2014.03.007, PP. 41-45

Keywords: 低熔点金属Sn,不锈钢,电化学腐蚀

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Abstract:

通过动电位极化和恒电流恒电位极化测试研究了低熔点金属Sn对304不锈钢腐蚀性能的影响,并采用扫描电子显微镜观察样品的腐蚀形貌。动电位极化的实验结果表明黏附于304不锈钢表面的Sn加速了基体点蚀的形成,并且Sn的量越多点蚀越严重。不同时间的恒电位极化也说明在相同实验条件下Sn存在的304不锈钢,腐蚀坑多且深。恒电流极化测试表明Sn降低304不锈钢的腐蚀性能,源于电极电位较低的Sn容易点蚀,使腐蚀坑内酸性升高最终导致钢的破坏。

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