王鸿，谷荣坤，宋义全

( 内蒙古科技大学材料与冶金学院，内蒙古包头014010)

关键词: X80 钢; 土壤腐蚀; 稀土铈( Ce)

中图分类号: TG172． 4 文献标识码: A

摘要: 通过自腐蚀电位( Ecorr) 、交流阻抗谱等电化学方法，研究了稀土铈( Ce) 对X80 钢在内蒙古伊克昭盟土壤模拟溶液中腐蚀行为的影响. 实验结果表明，当Ce 的质量分数为0． 006 2% 时X80 钢的耐蚀性最强，但随着稀土含量的增加，X80 钢的耐蚀性不再提高; 随着腐蚀浸泡时间的延长，试样的腐蚀率先增加后降低. X80 钢的腐蚀主要呈现不均匀腐蚀，而X80Ce 钢发生了较均匀的腐蚀现象，腐蚀产物的XRD 分析表明，两种钢的腐蚀产物主要为FeOOH、Fe2O3

和Fe3O4.

Effect of cerium on corrosion behavior of X80 steel in the Yimeng soil simulated solution

WANG Hong，GU Rong-kun，SONG Yi-quan

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

Key words: X80 steel; soil corrosion; rare earth cerium

Abstract: The effect of cerium ( Ce) on the corrosion behavior of X80 steel in the soil simulated solution in Yimeng was studied by using free corrosion potential and electrochemical method． The results showed that the corrosion-resistance of X80 steel with 0. 006 2 percent Ce was the best ． But with the increase of the Ce content，the corrosion resistance of X80 steel no longer increased． The corrosion rate of the sample increased firstly and then reduced with the extension of the corrosion immersion time． The X80 steel corrosion was mainly characterized by uneven corrosion ，and the X80Ce steel was uniformly corroded ．The corrosion products of X80Ce steel mainly consist of FeOOH，Fe2O3 and Fe3O4 as shown by XRD analysis．