热轧法制备不锈钢包钢复合材料在4种土壤溶液中的腐蚀行为  

Corrosion Behavior of Stainless Steel/Carbon Steel Composite Material Prepared by Hot Rolling in Four Soil Solutions

作　　者：李嫔 沈文宁[1,2] 冯拉俊 冯慧[3] 曹英[1] 葛延峰 LI Pin1 , SHEN Wen-ning1,2, FENG La-jun1, FENG Hui3, CAO Ying1, GE Yan-feng1(1. School of Materials Science and Engineering, Xi＇an University of Technology, Xi＇ an 710048, China; 2. Shaanxi Province Key Laboratory of Corrosion and Protection, Xi＇an 710048, China; 3.Shaanxi Institute of Zoology, Xi＇ an 710032, China)

机构地区：[1]西安理工大学材料学院,陕西西安710048 [2]陕西省腐蚀与防护重点实验室,陕西西安710048 [3]陕西省动物研究所,陕西西安710032

出　　处：《材料保护》2018年第9期149-153,共5页Materials Protection

摘　　要：目前有关不锈钢包钢复合材料在不同土壤环境及直流杂散电流下腐蚀行为的研究尚不系统。为此,以泥岩土、黄土、沙土和盐渍土土壤溶液为腐蚀介质,利用电解加速腐蚀与电化学试验研究热轧法制备的不锈钢包钢复合材料在无电流和直流杂散电流下的腐蚀行为。结果表明:热轧法制得的复合材料由基材区、过渡区和覆材区组成;复合材料在4种土壤溶液中的腐蚀程度为盐渍土>黄土>沙土>泥岩土;复合材料在高Cl-盐渍土中易发生点蚀,其腐蚀速率为泥岩土中的6倍多;外加直流电流加速复合材料在4种土壤溶液中的腐蚀,随着电流密度增加,腐蚀速率增大。Since the corrosion behavior of stainless steel/carbon steel composite material in different soils with stray current was still unclear, the corrosion behaviors of the composite material prepared by modified hot rolling method were studied by electrolytic accelerated corrosion test and electrochemical measurements without and with stray current, using soil solutions of mudstone soil, loess, sandy soil and saline soil, re- spectively. Results showed that the prepared composite material was composed of the substrate, transition material and cladding material. The corrosion degree of the composite material in the soil solutions was in the following order： saline soil 〉 loess 〉 sandy soil 〉 mudstone soil. The pitting corrosion of the composite material easily occurred in the saline soil with high Cl^- content, and the corrosion rate was about six times larger than that in mudstone soil. Thus, the composite was unsuitable for use in saline soil environment. Direct current discharge accelerated the corrosion of the composite material in the four soil solutions and the corrosion rate increased with the increasing current density.

关 键 词：不锈钢包钢复合材料 土壤腐蚀 极化曲线 电化学阻抗 杂散电流 

分 类 号：TG172.4[金属学及工艺—金属表面处理]