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℃/25MPa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℃/15.2MPa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。
The susceptibility to stress corrosion cracking(SCC)of austenitic stainless steel HR3C in supercritical water(SCW)at 550℃/25MPa,600℃/25MPa and 650℃/25MPa was studied by slow strain rate tests(SSRT).The general corrosion behavior in supercritical water at 650℃/25MPa and in subcritical water at 290℃/15.2MPa 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.
出处
《腐蚀与防护》
CAS
北大核心
2014年第7期662-667,共6页
Corrosion & Protection
基金
国家"973"重点基础研究发展计划(2007CB209802)
