摘要
采用慢应变速率拉伸实验方法,研究了高温高压水环境中pH值对316L不锈钢应力腐蚀开裂的影响规律,并通过扫描电镜对试样断口形貌进行分析。结果表明:在300℃时,316L不锈钢在酸性和碱性溶液中的应力腐蚀开裂敏感性较大,且酸性越强,敏感性越大。在中性溶液中,316L不锈钢的强度和塑性损失较小,应力腐蚀敏感性较小,断口分析与之吻合。
In a simulated primary circuit of PWR environment, the effect of temperature on stresscorrosion cracking (SCC) of 316L stainless steel in high-pressure water was investigated using slowstrain rate tests (SSRT). And the fracture morphology of specimens was analyzed with the aid ofscanning electron microscopy (SEM).It is show that 316L stainless steel exhibits a high susceptibilityto SCC in weak alkaline and acidic solutions at 300 ℃ ,and the susceptibility increases by decreasingthe pH value of the solution. In neutral solutions both the strength and toughness of 316L stainless steeldisplay a limited loss, indicating that 316L stainless steel has a low susceptibility to SCC.Fractographyanalysis is also consistent with these conclusions.
作者
关矞心
GUAN Yu-xin(Suzhou Nuclear Power Research Institute,Suzhou 215004,China)
出处
《全面腐蚀控制》
2016年第9期63-67,共5页
Total Corrosion Control
关键词
不锈钢
应力腐蚀开裂
腐蚀
拉伸试验
stainless steel
stress corrosion cracking
corrosion
tensile testing
