Abstract This study investigated the corrosion and stress corrosion cracking susceptibility of 316L stainless steel exposed to 550 °C and 600 °C supercritical water. XRD, SEM, EDS and EBSD analyses have been carried out to characterize the microstructure of the tested specimens. Results indicate that increasing the test temperature reduced the corrosion and SCC resistance of 316L SS. The oxide scale of corroded specimen shows a duplex structure, and the fracture analysis indicates that the formation of Fe 3 O 4 ‘channels’ in the Fe-Cr spinel layer contributes to the intergranular and transgranular SCC of the materials in 550 °C and 600 °C SCW.

中文翻译：

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316L不锈钢超临界水腐蚀及应力腐蚀开裂敏感性研究

摘要 本研究研究了 316L 不锈钢在 550 °C 和 600 °C 超临界水中的腐蚀和应力腐蚀开裂敏感性。已经进行了XRD、SEM、EDS和EBSD分析来表征测试样品的微观结构。结果表明，提高试验温度会降低 316L SS 的腐蚀和 SCC 抗性。腐蚀试样氧化皮呈双相结构，断口分析表明，Fe-Cr尖晶石层中Fe 3 O 4 '通道'的形成有助于材料在550℃和600℃下发生晶间和穿晶SCC。 °C SCW。