Oxidation of stainless steel 316 and Nitronic 50 in supercritical and ultrasupercritical water
Oxidation of stainless steel 316 and Nitronic 50 in supercritical and ultrasupercritical water
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DOI：
10.1016/j.apsusc.2015.03.127
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发表时间：
2015-08
影响因子：
6.7
通讯作者：
David Rodriguez;D. Chidambaram
中科院分区：
文献类型：
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作者：
David Rodriguez;D. Chidambaram
研究了不锈钢316和nitron 50在超临界和超超临界水中的腐蚀与温度和暴露时间的关系。使用拉曼光谱和x射线光电子能谱进行曝光后表面分析，以确定由于曝光而形成的氧化物的化学性质。当暴露在超临界水中时，观察到氮50和不锈钢316有相似的重量增加；然而，在超超临界水中进行的暴露试验中，发现316不锈钢比50硝酸增加的重量少。不锈钢316的表面膜主要由氧化铁组成，而氮50的表面含有铁、铬和锰氧化物的混合物。基于这些分析，两种材料的增重和氧化特性的差异归因于nitrononic 50中Cr和Mn的浓度高于不锈钢316。
Corrosion of stainless steel 316 and Nitronic 50 exposed to supercritical and ultrasupercritical water was studied as a function of temperature and exposure time. Post-exposure surface analysis was performed using Raman and X-ray photoelectron spectroscopies to determine the chemistry of the oxides formed as a result of the exposure. When exposed to supercritical water, Nitronic 50 and stainless steel 316 were observed to have similar weight gains; however, stainless steel 316 was found to gain less weight than Nitronic 50 in exposure tests performed in ultrasupercritical water. Stainless steel 316 developed surface films primarily composed of iron oxides, while the surface of Nitronic 50 contained a mixture of iron, chromium and manganese oxides. Based on these analyses, the differences in weight gain and oxidation characteristics of the two materials are attributed to the higher concentration of Cr and Mn in Nitronic 50 compared to stainless steel 316.