摘要
试验用X70管线钢(/%:0.12C、0.20Si、1.60Mn、0.005P、0.005S、0.10V、0.10Nb、0～0.15RE)用10kg真空感应炉冶炼。采用电化学和失重分析法研究了微量稀土对X70管线钢在0.1 mol/L Na_2SO_4水溶液中的腐蚀行为。试验结果表明,微量稀土可降低管线钢腐蚀电流i_(corr),改善腐蚀形貌。随着稀土加入量的增加,腐蚀电流减小,当钢中的RE含量由0增加至0.10%时腐蚀速率由7.43μg/(cm^2·day)降至0.29μg/(cm^2·day)。稀土的最适宜加入量是0.10%。
Test pipeline steel X70 （/%： 0. 12C, 0.20Si, 1.60Mn, 0.005P, 0.005S, 0. 10V, 0. 10Nb, 0 - 0. 15RE） is melted by a 10 kg vacuum induction furnace. The corrosion behavior of pipeline steel X70 with micro-RE in 0. 1 mol/L Na2SO4 water solution is studied by electrochemistry and weight loss method. Results show that the micro-RE addition obviously decreases corrosion current ico. of pipeline steel and improves morphology of corrosion surface. With in- creasing RE addition the corrosion current decreases and as RE content in steel increases from 0 to 0. 10% the corrosion rate of steel decreases from 7.03 μg/（cm^2 · day） to 0. 29 μg/（cm^2 ·day）. The suitable RE addition is 0. 10%.
出处
《特殊钢》
北大核心
2012年第5期49-50,共2页
Special Steel
基金
国家自然科学基金项目(51174114)
内蒙古自然科学基金项目(2010Zd105)
内蒙古高校科学研究项目(NJ2207098)资助
关键词
稀土
腐蚀性能
X70
管线钢
RE Elements, Corrosion Behavior, Pipeline Steel X70
