【摘要】 用电化学测试、化学浸泡等方法研究了超级奥氏体不锈钢 0 0 Cr2 4Ni2 2 Mo7Mn3Cu N(6 5 4SMO)的耐点腐蚀和耐缝隙腐蚀的性能。通过改变氮含量 ,研究了氮对奥氏体不锈钢的耐点腐蚀和耐缝隙腐蚀性能的影响。结果表明 ,氮和适量的铬、钼结合 ,能显著提高奥氏体不锈钢的耐点腐蚀和缝隙腐蚀的能力 ,并且随着氮含量的增加 ,奥氏体不锈钢的耐点腐蚀和耐缝隙腐蚀的能力也增强。对比实验表明 ,超级奥氏体不锈钢在耐点腐蚀、缝隙腐蚀等局部腐蚀性能方面可以和镍基合金 C- 2 76媲美 ,甚至优于镍基合金。更多还原

【Abstract】 The pitting resistance and the crevice corrosion resistance of superaustenitic stainless steels 00Cr24Ni22Mo7Mn3CuN(654SMO) were studied in concentrated chloride media by electrochemical and chemical immersion test. Through changing the concentration of nitrogen, the influence of nitrogen on pitting resistance and crevice corrosion resistance of austenitic stainless steels have been studied. The results showed that nitrogen enhances noticeably the pitting resistance and the crevice corrosion resistance of austenitic stainless steel in combination with suitable content of molybdenum and chromium. With the increase of nitrogen content, the pitting resistance and the crevice corrosion resistance increase. For local corrosion, such as pitting and crevice corrosion, the property of superaustenitic stainless steel is as good as hastelloy alloy C 276, and even better.更多还原