稀土对X70管线钢腐蚀行为的影响

特殊钢 ›› 2012, Vol. 33 ›› Issue (5): 49-50.

稀土对X70管线钢腐蚀行为的影响

杨吉春, 左立杰, 赵丙新, 聂亚丽

内蒙古科技大学材料与冶金学院，包头014010

收稿日期:2012-03-26 出版日期:2012-10-01 发布日期:2022-10-10
作者简介:杨吉春(1963-),男，博士，教授，硕士生导师,1984年包头钢铁学院毕业，钢铁冶金新技术新工艺研究。
基金资助:
国家自然科学基金项目 (51174114)；内蒙古自然科学基金项目(2010Zdl05)；内蒙古高校科学研究项目 (NJ2207098)资助

Effect of RE Elements on Corrosion Behavior of Pipeline Steel X70

Yang Jichun, Zuo Lijie, Zhao Bingxin, Nie Yali

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010

Received:2012-03-26 Published:2012-10-01 Online:2022-10-10

摘要/Abstract

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 Na₂SO₄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/(cm².day)降至0.29μg/(cm².day)。稀土的最适宜加入量是0.10%。

Abstract: Test pipeline steel X70 (/%: 0. 12C, 0. 20Si, 1.60Mn, 0. 005P, 0. 005S, 0. 10V, 0. lONb, 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 i_corr of pipeline steel and improves morphology of corrosion surface. With increasing 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. 03μg/ (cm². day) to 0. 29μg / (cm²・ day). The suitable RE addition is 0. 10%.

杨吉春, 左立杰, 赵丙新, 聂亚丽. 稀土对X70管线钢腐蚀行为的影响[J]. 特殊钢, 2012, 33(5): 49-50.

Yang Jichun, Zuo Lijie, Zhao Bingxin , Nie Yali. Effect of RE Elements on Corrosion Behavior of Pipeline Steel X70[J]. Special Steel, 2012, 33(5): 49-50.