稀土对汽车板用钢耐工业大气腐蚀性的影响  

Effect of Rare Earth on Industrial Atmospheric Corrosion Behavior of Automobile Steel Sheet

作　　者：李涛[1,2] 孙帅[1,2] 刘毅[2] 

机构地区：[1]内蒙古科技大学国家重点实验室,内蒙古包头014010 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《热加工工艺》2017年第4期75-77,82,共4页Hot Working Technology

基　　金：内蒙古自然科学基金资助项目(2014MS0525)

摘　　要：通过模拟工业大气腐蚀试验,研究了稀土对汽车板用钢耐腐蚀性能的影响。通过SEM和XRD研究了锈层的形貌和腐蚀产物的成分。采用极化曲线法和失重法分析了电化学行为和腐蚀动力学规律。结果表明:含稀土的汽车板用钢比不含稀土的汽车板用钢的锈层更加致密与连续;含稀土的汽车板用钢自腐蚀电位高于不含稀土的汽车板用钢。在本试验条件下,稀土能提高汽车板用钢的耐工业大气腐蚀性。The effects of rare earth on the corrosion resistance of automobile sheet steel were studied by simulating industrial atmospheric corrosion test. By SEM and XRD, the morphology of rusty scale and composition of corrosion products were studied. The electrochemical behavior and corrosion kinetics rule were analyzed by using polarization curve method and gravimetric method. The results show that compared with automobile panels without rare earth, the rusty scale of the steel used for automobile steel sheet containing rare earth is more compact and continuous, and the corrosion potential is higher than that of automobile steel sheet non-containing rare earth. Under experimental conditions, the rare earth can improve the corrosion resistance of the steel used in the automobile industry.

关 键 词：汽车板用钢 工业大气腐蚀 稀土 极化曲线 

分 类 号：TG172[金属学及工艺—金属表面处理]