Probing propensity of grade 2205 duplex stainless steel towards atmospheric chloride-induced stress corrosion cracking
Probing propensity of grade 2205 duplex stainless steel towards atmospheric chloride-induced stress corrosion cracking
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DOI：
10.1179/1743278214y.0000000205
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发表时间：
2014-09-01
影响因子：
1.8
通讯作者：
Ornek, C.
中科院分区：
文献类型：
--
作者：
Engelberg, D. L.;Ornek, C.
研究了2205级双相不锈钢在50 ℃下的氯化物应力腐蚀开裂倾向。电子背散射衍射已被用来分析接收和750 ℃热处理的微观结构。在含氯化物的水环境中的筛选试验，调查这两种微观结构的腐蚀行为。这些测试表明，当暴露于含HCl或FeCl 3的环境时，腐蚀速率显著增加。应力腐蚀开裂测试与大气暴露长达12个月的铁素体的选择性溶解，伴随着奥氏体中的应力腐蚀微裂纹。这项工作表明，2205级双相不锈钢显微组织可能会在50 ℃的大气暴露条件下对应力腐蚀开裂敏感。
The propensity of grade 2205 duplex stainless steel towards atmospheric chloride-induced stress corrosion cracking at 50 degrees C has been investigated. Electron backscatter diffraction has been used to characterise as received and 750 degrees C heat-treated microstructures. Screening tests in chloride-containing aqueous environments were employed to investigate the corrosion behaviour of both microstructures. These tests indicated significantly increased corrosion rates when exposed to HCl or FeCl3-containing environments. Stress corrosion cracking tests with atmospheric exposures for up to 12 months showed selective dissolution of the ferrite, accompanied by stress corrosion microcracks in the austenite. This work demonstrates that grade 2205 duplex stainless steel microstructure may be rendered susceptible to stress corrosion cracking under atmospheric exposure conditions at 50 degrees C.