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金属学报  2010 

DL-EPR法评价2205双相不锈钢晶间腐蚀敏感性

DOI: DOI:10.3724/SP.J.1037.2009.00598, PP. 380-384

Keywords: 2205双相不锈钢,DL-EPR,晶间腐蚀敏感性,σ相

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Abstract:

利用Thermo-Calc软件并结合金相显微镜,定性研究了2205双相不锈钢在800℃下敏化不同时间后的微观组织演变过程.通过研究扫描速率、介质成分、介质温度和试样表面状态优化了双环电化学动电位再活化法(DL-EPR),并用该优化方法研究了2205双相不锈钢晶间腐蚀敏感性.结果表明DL-EPR法能定量评价σ相对2205双相不锈钢晶间腐蚀敏感性的影响,随敏化时间延长,σ相含量增多,晶间腐蚀敏感性也随之增加.腐蚀形貌的观测验证了这一规律.

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