Co、Al共渗涂层的性能研究  

Study of CoAl Coating by Pack Cementation Process

作　　者：马春春[1,2,3] 孙建刚[1,2] 刘镇洋[1,2] 张鑫[1,2] MA Chun-chun;SUN Jian-gang;LIU Zhen-yang;ZHANG Xin(Beijing General Research Institute of Mining and Metallurgy,Beijing 100160,China;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry parts,Beijing 102206,China;Beihang University,Beijing 100083,China)

机构地区：[1]北京矿冶研究总院,100160 [2]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [3]北京航空航天大学,北京100083

出　　处：《热喷涂技术》2016年第2期30-35,共6页Thermal Spray Technology

摘　　要：本文采用包埋渗方法实现了在镍基高温合金表面共渗Co、Al涂层,并研究了涂层在3.5%Na Cl溶液的耐腐蚀性能以及经过盐雾加速腐蚀(NSS)处理的涂层抗高温氧化性能。试验结果表面明,经NaCl溶液浸泡768h后,涂层仍然具有较好的耐腐蚀性能—腐蚀电流密度9.78×10^(-8)A/cm^2。经过100h和300h中性盐雾加速腐蚀的涂层试样在高温静态氧化条件下,氧化增重<1g·cm^(-1),达到国际标准中的完全抗氧化级别,表明CoAl共渗涂层经过NSS后,仍然具有良好的高温抗氧化性能。In this paper,we achieved CoAl coating on the surface of nickel-based superalloys by packcementation process.The room temperature corrosion resistance in3.5%NaCl solution and high-temperatureoxidation resistance of the coating were investigated.Results show that the corrosion current of the coating afterimmersing for768h in3.5%NaCl solutions is9.78×10-8A/cm2,which indicats that the CoAl coating has a goodroom temperature corrosion resistance.The mass gain of the coating which suffered to neutral salt spray(NSS)test followed by high-temperature isothermal oxidation is less than1g?cm-1,which indicates that the coating iscomplete antioxidant according to the international standard and thus yield superior corrosion resistance.

关 键 词：CoAl涂层 动电位极化曲线 中性盐雾腐蚀 高温静态氧化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]