高能等离子喷涂纳米Al_2O_3-13%TiO_2涂层的组织与耐蚀性能

STRUCTURE AND CORROSION RESISTANCE OF NANO Al_2O_3-13% TiO_2 COATINGS BY HIGH ENERGY PLASMA SPRAYING

本文采用高能等离子喷涂方法制备了纳米Al2O3-13%TiO2涂层。通过X射线衍射法(XRD)分析了涂层物相成分,利用电子显微镜观察涂层截面组织形貌,并检测涂层盐雾腐蚀性能与人造海水耐蚀性能。结果表明:该涂层显微组织结构不同于普通等离子喷涂的Al2O3-13%TiO2涂层;涂层在人造海水环境下平均腐蚀率为0.025g/m2.h;盐雾气氛平均腐蚀率为0.0136g/m2.h。

Nano-Al2O3-13wt% TiO2 coating was prepared by using high energy plasma spra ying. The coating cross section morphology was observed by electron microscopy. Coating plase composition was analysed by X-ray diffraction （XRD）. The corrosion resistance of the coating in salt spray and artificial seawater were examined. The results show that the coating microstructure is different from that of the ordinary plasma spraying coating of Al2O3-13wt% wt TiO2 ; arerage corrosion rate of coating in artificial seawater is 0. 025 g/m^2 · h, average corrosion rata in salt spray 0. 0136 g/m^2 · h.