Effects of Dissolved Oxygen,Chloride and Treatment on Stress Corrosion Behavior of 316L SS in High Temperature Pure Water
摘 要
采用慢应变速率试验(SSRT),在模拟压水堆核电厂高温高压水环境(325 ℃、15.5 MPa)中,研究了溶解氧(DO)、氯离子和处理方式对316L不锈钢(SS)的应力腐蚀开裂(SCC)倾向的影响规律,并观察了试样断口形貌.结果表明,冷变形和固溶处理的316L不锈钢分别在含0 μg/kg DO+0 μg/kg Cl-,200 μg/kg DO+0 μg/kg Cl-,0 μg/kg DO+30 μg/kg Cl-及200 μg/kg DO+30 μg/kg Cl-的高温水环境中都呈现出了不同程度的SCC倾向,且200 μg/kg DO和30 μg/kg Cl-使SCC倾向更为明显.同时,冷变形可大大提高316L不锈钢的屈服强度,但是也提高了SCC敏感性.
Abstract
The effects of DO,Cl- and treatment on the SCC behavior of 316L SS were srudied by SSRT in high temperature (325 ℃) and high pressure (15.5 MPa) environments and the fracture morphology of specimens after testing was observed carefully.The results showed that both cold worked and solution treated 316L SS had SCC susceptibility in high temperature water environments containing 0 μg/kg DO+0 μg/kg Cl-,200 μg/kg DO+0 μg/kg Cl-,0 μg/kg DO+30 μg/kg Cl- or 200 μg/kg DO+30 μg/kg Cl-.And the effect of 200 μg/kg DO and 30 μg/kg Cl- on SCC susceptibility was very remarkable.Although cold work could enhance the yield strength of 316L SS,it increased the SCC susceptibility of 316L SS.
中图分类号 TG174 TL341 DOI 10.11973/fsyfh-201507005
所属栏目 试验研究
基金项目 压水堆核电材料环境相容性研究重大专项(2011ZX0600400908)
收稿日期 2014/7/14
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备注张乐福(1967-),副教授,博士,从事核电材料研究.
引用该论文: LU Hui,SHEN Zhao,DU Dong-hai,ZHANG Le-fu. Effects of Dissolved Oxygen,Chloride and Treatment on Stress Corrosion Behavior of 316L SS in High Temperature Pure Water[J]. Corrosion & Protection, 2015, 36(7): 620
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