摘要
研究了445M铁素体不锈钢(%:0.004～0.005C、22.24～22.29Cr、1.10～1.65Mo、0.015～0.016P、0.003～0.004S、0.012～0.016N、0.22～0.38Ti)和316L奥氏体不锈钢(%:0.022C、16.80Cr、10.19Ni、2.02Mo、0.025P、0.001S、0.046N)在40～60℃氯离子浓度(250～5 000)×10^(-6)的氯化钠溶液的缝隙腐蚀性能。结果表明,445M铁素体不锈钢的耐缝隙腐蚀性能优于316L奥氏体不锈钢;当445M钢中的Mo含量由1.10%提高至1.65%时,钢的耐缝隙腐蚀性能明显提高,表明点蚀当量Cr+3.3Mo是衡量不锈钢耐点蚀和耐缝隙腐蚀的重要指标。
The crevice corrosion performance of 445M ferrite stainless steel （% ：0.004～0.005C、22.24～22.29Cr、1.10～1.65Mo、0.015～0.016P、0.003～0.004S、0.012～0.016N、0.22-0.38Ti） and 316L austenite stainless steel （%： 0. 022C, 16.80Cr, 10. 19Ni, 2.02Mo, 0. 025P, 0. 001S, 0. 046N） in sodium chloride solution with chlorion concentration （250 -5 000） × 10-6 at 40 -60 ℃ has been studied. Results show that the crevice corrosion resistance of 445M steel is better than that of 316L steel; and with increasing the Mo content in 445M steel from 1. 10% to 1.65% , the crevice corrosion resistance of steel obviously increases, it indicated that the pitting corrosion resistance equivalent- Cr ＋ 3.3Mo is an important index to measure the pitting and crevice corrosion resistance of stainless steels.
出处
《特殊钢》
北大核心
2011年第3期65-67,共3页
Special Steel
基金
国家科技部支撑计划项目资助(2007BAES1B01)
关键词
445M铁素体不锈钢
缝隙腐蚀
点蚀当量
445M Ferrite Stainless Steel, Crevice Corrosion, Pitting Corrosion Resistance Equivalent
