碳钢表面等离子喷涂NiCrAl涂层的耐蚀性能研究  

Research on Corrosion Resistance of Plasma-sprayed NiCrAl Coating on Carbon Steel Surface

作　　者：董会[1] 姚建洮 周勇[1] 李霄[1] 李渊博[1] 

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065

出　　处：《热加工工艺》2017年第22期135-138,142,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51605384);陕西省自然科学基础研究计划项目(2016JQ5077);陕西省教育厅专项科研计划项目(16JK1597);西安石油大学<材料科学与工程>省级优势学科资助(YS37020203)

摘　　要：采用高温高压及电化学腐蚀实验研究了Q235钢、13Cr以及Q235钢表面沉积Ni Cr Al涂层后的耐CO2腐蚀性能。Ni Cr Al涂层采用等离子喷涂制备。结果表明:Q235钢抗均匀腐蚀和局部腐蚀的能力较差;13Cr抗均匀腐蚀能力良好,但出现明显的点蚀;Ni Cr Al涂层具有良好的抗均匀腐蚀及点蚀能力。Ni Cr Al涂层的通孔结构为腐蚀介质提供了渗入通道,进而腐蚀界面处的Q235钢。The CO2 corrosion resistance performances of Q235 steel, 13Cr stainless steel and plasma-sprayed NiCrAl coating on carbon steel were studied by high temperature and high pressure and electrochemical corrosion tests. NiCrAl coating was deposited by atmospheric plasma spraying. The results show that Q235 steel has bad general corrosion resistance and local corrosion resistance. 13Cr exhibits an excellent general corrosion resistance, while a dramatical local corrosion appears. NiCrA1 coating presents good general corrosion resistance and local corrosion resistance. The connected porosities in NiCrAl coating can provide a passageway for corrosive medium. Subsequently, Q235 steel at the interface is corroded.

关 键 词：等离子喷涂 NICRAL涂层 电化学腐蚀 二氧化碳腐蚀 

分 类 号：TG178[金属学及工艺—金属表面处理]