电弧喷涂Ti6Al4V涂层的组织与耐蚀性能研究  

Study on Microstructure and Corrosion Resistance of the Ti6Al4V Coating by Velocity Arc Spray

作　　者：刘荣祥[1] 周立文[1] 杨玉杰[2] 曹先启[1] 

机构地区：[1]黑龙江科技学院材料科学与工程学院,哈尔滨150027 [2]大庆石油化工总厂技工学校,大庆163714

出　　处：《表面技术》2011年第1期14-16,67,共4页Surface Technology

基　　金：黑龙江省普通高等学校骨干教师创新能力资助计划(1151G042)

摘　　要：采用电弧喷涂技术在Q235钢基体上喷涂Ti6Al4V涂层,并对涂层进行封孔处理。表征了涂层的物相组成和微观形貌,通过盐水浸泡实验和极化曲线测试对比分析了Q235钢基体、未封孔涂层和封孔涂层的耐腐蚀性能。结果表明:涂层呈典型的层状特征,物相组成为TiN,TiO和少量的Ti;未封孔涂层与封孔涂层均具有较宽的钝化电位区间,封孔处理可以封闭电弧喷涂工艺造成的空隙或微裂纹,因此封孔涂层的耐蚀性显著更高。Ti6Al4V coating was prepared on Q235 steel substrate by velocity arc spray.The sealing treatment was done to the coating.The phase composition and morphology of coating were characterized.The corrosion resistance of the Q235 steel substrate,the no sealing coating and the sealing coating was compared and analyzed by salt water immersion test and polarization curve test.The microstructure and corrosion resistance of the coating were investigated by SEM,XRD and electrochemical polarization measurement.The results show that the coating has homogenously laminated microstructure and contains TiN,TiO and a little Ti.The coating with paint shows the most excellent corrosion resistance.Wide passivation potential range between no sealing coating and sealing coating,the gaps and microcracks by velocity arc spray were closed by sealing treatment,so the corrosion resistance of sealing treatment was increased clearly.

关 键 词：电弧喷涂 Q235钢 Ti6Al4V涂层 耐蚀性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]