几种不同材料在含硫介质中的腐蚀速率和腐蚀形貌研究  

Corrosion Rate and Morphology of Different Materials in Sulfer-Bearing Solution

作　　者：雷阿利[1] 冯拉俊[1] 马小菊[1] 唐文浩[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《西安理工大学学报》2006年第3期304-306,共3页Journal of Xi'an University of Technology

基　　金：陕西省教育厅专项科研基金资助项目(02JC15)

摘　　要：利用失重法研究了45#碳钢、1Cr18Ni9Ti、304不锈钢和Ni-P合金镀层在含硫介质中的腐蚀速率,采用JSM-6700F场发射扫描电子显微镜观察了微观腐蚀形貌。结果表明,45#碳钢的腐蚀速率大于其它三种材料,Ni-P合金镀层、1Cr18Ni9Ti和304不锈钢是含硫介质中的耐蚀材料。随着S2-含量的增加及温度的升高,腐蚀速率增大,在80℃、S2-浓度为2.5%时,Ni-P合金镀层腐蚀速率最大,但也仅为0.004 56 mg.m-2.h-1。微观腐蚀形貌观察,45#碳钢出现大面积的腐蚀沟槽;1Cr18Ni9Ti和304不锈钢表面出现点蚀坑;Ni-P镀层宏观上形成均匀腐蚀。The corrosion rates of 45^# carbon steel, 1Cr18Ni9Ti, 304 stainless steel, and Ni-P alloy coatings in sulfer-bearing solution were studied by gravimetric method. Microcosmic corrosion morphologies of these materials were investigated using field emission scanning electronic microscope（JSM-6700F）. Experimental results showed that the corrosion rates of 45 carbon steel are higher than the other three kinds of materials, Ni-P alloy coatings, 1Cr18Ni9Ti, and 304 stainless steel are corrosion resistant materials in sulfur-bearing solution. With an increase in S^2- content and temprature rising, corrosion rate increases,in 80℃ ,S^2- concentration is 2.5% ,and the rate of Ni-P alloy coating corrosion is the maximum,only with 0. 004 56 mg·m^-2· h^-1. Micro-corrosion morphological observation indicates that large area corrosion grooves appear on the surface of 45 carbon steel, corrosion pittings distribute on the surface of 1Cr18Ni9Ti and 304 stainless steel, and uniform corrosion occurs on the Ni-P alloy coating macroscopically.

关 键 词：45^#碳钢 1CR18NI9TI 304不锈钢 Ni—P合金镀层 硫腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]