超级奥氏体不锈钢HR3C在SCW中的腐蚀行为
Corrosion Behavior of Super Austenitic Stainless Steel HR3C in SCW
摘 要
采用慢应变速率试验研究了超级奥氏体不锈钢HR3C在550 ℃/25 MPa、600 ℃/25 MPa和650 ℃/25 MPa超临界水(SCW)中的应力腐蚀开裂(SCC)敏感性, 以及在超临界650 ℃/25 MPa和次临界290 ℃/15.2 MPa水中的均匀腐蚀性能。结果表明, 随着温度的升高, HR3C的力学强度逐渐下降; 试验后断面SEM表明材料在三种超临界工况下均具有SCC倾向; HR3C在超临界水条件下的腐蚀增重大致符合幂函数生长规律, 而在次临界条件下的腐蚀重量变化却呈现出先减后增的特征。
超临界水
SCC
均匀腐蚀
super austenitic stainless steel HR3C
SCW
SCC
general corrosion
Abstract
The susceptibility to stress corrosion cracking (SCC) of austenitic stainless steel HR3C in supercritical water (SCW) at 550 ℃/25 MPa, 600 ℃/25 MPa and 650 ℃/25 MPa was studied by slow strain rate tests(SSRT) . The general corrosion behavior in supercritical water at 650 ℃/25 MPa and in subcritical water at 290 ℃/15.2 MPa was also studied. The results showed that the strength of HR3C decreased as temperature increased. The ex-situ scanning electron microscopy (SEM) showed that HR3C under the three conditions in supercritical water all had susceptibility to SCC. The general corrosion experiment in supercritical water showed that the weight gain was subject to power function growth kinetics, while the one in subcritical water indicated the weight loss and then weight gain.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家“973”重点基础研究发展计划(2007CB209802)
收稿日期 2013/9/5
修改稿日期
网络出版日期
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备注张乐福(1967-),副教授,博士后,从事核材料防腐蚀研究,
引用该论文: SHEN Zhao,DU Dong-hai,SUN Yao,ZHANG Le-fu,XU Xue-lian. Corrosion Behavior of Super Austenitic Stainless Steel HR3C in SCW[J]. Corrosion & Protection, 2014, 35(7): 662
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参考文献
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【6】ZHANG Q,TANG R,YIN K. Corrosion behavior of hastelloy C-276 in supercritical water[J]. Corros Sci,2009(51):2092-2097.
【7】NOVOTNY R,HHNER P,SIEGI J. Stress corrosion cracking susceptibility of austenitic stainless steelsin supercritical water conditions[J]. J Nucl Mater,2011(409):117-123.
【8】OTHMAN N K,ZHNAG J,YONG D J. Temperature and water vapor effects on the cyclic oxidation behavior of Fe-Cr alloys[J]. Corros Sci,2010(52):2827-2836.
【9】AMPORNRAT P,GUPTA G,WAS G. Tensile and stress corrosion cracking behavior of ferritic-martensitic steels in supercritical water[J]. J Nucl Mater,2009(395):30-36.
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