304奥氏体不锈钢在H_2S+Cl^-+CO_2+H_2O环境下的慢应变速率拉伸腐蚀试验研究  

Slow Strain Rate Testing Research of 304 Austenitic Stainless Steel in H_2S+Cl^-+CO_2+H_2O Complex Medium Condition

作　　者：赵亚楠[1,2] 陈学东[1,2] 艾志斌[2] 范志超[2] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014 [2]合肥通用机械研究院国家压力容器与管道安全工程技术研究中心安徽省压力容器与管道安全技术重点实验室,安徽合肥230031

出　　处：《压力容器》2016年第4期1-9,共9页Pressure Vessel Technology

摘　　要：通过慢应变速率拉伸腐蚀试验(SSRT),研究了304奥氏体不锈钢在H_2S+Cl-+CO_2+H2O复杂介质环境下的应力腐蚀敏感性,借助扫描电镜(SEM)、能谱分析仪(EDS)分析了断口形貌和腐蚀产物性质。在环境因素中主要考虑了H_2S浓度、Cl-浓度、CO_2浓度这三种介质参数单独或交互作用对材料应力腐蚀敏感性的影响。通过对试验数据进行逐步回归分析,建立了应力腐蚀敏感性指数随介质参数变化的数学模型,同时分析了各介质参数对304奥氏体不锈钢应力腐蚀影响的显著性。By means of slow strain rate testing （ SSRT）, the susceptive indexes of the stress corrosion cracking for 304 stainless steel in H2 S ＋ Cl- ＋ CO2 ＋ H20 complex medium condition were calculated. With the help of SEkl and EDS, this paper also analyzed the specimens＇ fracture morphology and the composition of corrosion products. Among the environmental factors, the separate and interactive effects of H2 S concentration, Cl- concentration and CO2 concentration on the susceptibilities of stress corrosion cracking were considered. By means of stepwise regression analysis to test results, the equations between the medium parameters and the susceptive indexes were established. The notabilities of medium parameters were indicated as well.

关 键 词：304奥氏体不锈钢 复合湿硫化氢环境 应力腐蚀 Cl- H2S CO2 逐步回归 

分 类 号：TH142[一般工业技术—材料科学与工程] TG142.71[机械工程—机械制造及自动化]