敏化和固溶处理对核级不锈钢Z3CN20-09M相间腐蚀敏感性的影响

中国腐蚀与防护学报

2013, Vol. 33

Issue (2): 141-147

研究报告

本期目录 | 过刊浏览

敏化和固溶处理对核级不锈钢Z3CN20-09M相间腐蚀敏感性的影响

易雪庆陆永浩陈迎锋

北京科技大学国家材料服役安全科学中心北京 100083

Effects of Sensitization and Solid-solution Treatment on Interphase Corrosion Susceptibility of Nuclear Grade Z3CN-09M Stainless Steel

YI Xueqing, LU Yonghao, CHEN Yingfeng

National Center for Materials Service Safety, University of Science and Technology Beijing, Beijng, 100083, China

全文: PDF(4981 KB)

摘要: 利用电化学动电位再活化法（EPR法）检测了核级不锈钢Z3CN20-09M奥氏体/铁素体相间腐蚀敏感性的程度。研究了敏化时间、敏化温度、固溶时间、固溶温度对Z3CN20-09M相间腐蚀性能的影响，并与304不锈钢的相应试验结果进行了对比。结果表明，核级不锈钢的相界抗腐蚀性要远高于304不锈钢；敏化温度越高，再活化率增加，相界腐蚀倾向增大，同时奥氏体晶内腐蚀加剧，敏化温度升到700°C后腐蚀到达饱和。敏化时间越长，相界腐蚀敏感性越大，但奥氏体晶内腐蚀程度下降。提高固溶温度或延长固溶时间，再活化率增加，相界和奥氏体晶内腐蚀均加剧。

关键词 ：核级不锈钢, EPR, 相间腐蚀, 敏化, 固溶
中图分类号：, TG172, 文献标识码：, A, 文章编号：, 1005-4537(2013)02-0141-07

Abstract：The interphase corrosion susceptibility of the nuclear grade stainless steel (Z3CN20-09M) δ/γ interface boundary was investigated by using electrochemical potential reactivation method (EPR). The effects of time and temperature of sensitization and solid-solution treatments on the interphase corrosion resistance of Z3CN20-09M stainless steel were studied. The results showed that the interphase corrosion resistance of the nuclear grade stainless steel is much better than that of the 304 stainless steel. With increase the temperature of sensitization treatment, the re-activation rate ,interphase corrosion susceptibility and the degree of corrosion inside the austenite grains increase. These effects peak at 700 ℃. In addition, with increase the sensitization time, the interphase corrosion susceptibility increases, thebut the degree of corrosion inside the austenite grains decreases. The re-activation rate increase with increase of time or temperature of solid-solution treatment. The corrosion within the anstenite grains and on the phase interface are intersified as well.

Key words： nuclear grade stainless steel EPR interphase corrosion sensitization solid solution

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引用本文:

易雪庆陆永浩陈迎锋. 敏化和固溶处理对核级不锈钢Z3CN20-09M相间腐蚀敏感性的影响[J]. 中国腐蚀与防护学报, 2013, 33(2): 141-147.
. Effects of Sensitization and Solid-solution Treatment on Interphase Corrosion Susceptibility of Nuclear Grade Z3CN-09M Stainless Steel. Journal of Chinese Society for Corrosion and protection, 2013, 33(2): 141-147.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I2/141

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