微合金化对铝基非晶合金涂层耐蚀性能的影响  

Effects of Microalloying on Corrosion Resistance of Al-based Amorphous Coating

作　　者：吕威闫 王晓明 常青 邱实 杨番 杨柏俊[1] LV Weiyan;WANG Xiaoming;CHANG Qing;QIU Shi;YANG Fan;YANG Baijun(Shenyang National Laboratory for Materials Science,Institute of Metal Research,Shenyang 110016,China;National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China;Structure Corrosion Protection and Control of Aviation Science and Key Laboratory,China Special Vehicle Research Institute,Jingmen 448035,China;School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]中国科学院金属研究所沈阳材料科学国家研究中心,沈阳110016 [2]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [3]中国特种飞行器研究所结构腐蚀防护与控制航空科技重点实验室,荆门448035 [4]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《中国表面工程》2019年第6期73-80,共8页China Surface Engineering

基　　金：国家重点研发计划(2018YFB1105803)。

摘　　要：为获得具备优异耐蚀能力的铝基非晶合金表面防护涂层,通过微合金化调控方法设计了铝基非晶合金的成分体系(Al86Ni6Y4.5Co2La1.5)100-x(M)x,(M:Cr、Mo、Ti),并采用超音速火焰喷涂(HVAF)工艺制备出相同成分的非晶合金涂层分析其耐蚀性能。结果表明:微量添加原子数分数0.5%的Mo、Cr元素时,铝基非晶合金的玻璃形成能力未见大幅度降低,仍具备完全非晶结构,但点蚀电位提高到-175~200 mV,较本征合金Al86Ni6Y4.5Co2La1.5增大了约50~80 mV,而腐蚀电流密度降低约1.5个数量级,同时Mo、Cr元素的添加扩大了合金的钝化区间,可起到缓蚀作用;采用优化成分制备出的铝基非晶合金涂层,孔隙率仅为0.5%,在质量分数3.5%NaCl溶液中表现出优异的耐蚀性能,且具有明显的自钝化行为及较宽的钝化区间。In order to obtain the Al-based amorphous surface protecting coating with excellent corrosion resistance,the composition system of Al-based amorphous alloy(Al86Ni6Y4.5Co2La1.5)100-x(M)x,(M:Cr,Mo,Ti)was designed by microalloying,and the amorphous alloy coating with the same composition was prepared by high velocity air fuel(HVAF)spraying process to analyze its corrosion resistance.The results show that when 0.5%Mo and Cr elements are added,the glass forming ability of Al-based amorphous alloy is not significantly reduced,but the pitting potential increases by−175–200 mV,which is 50–80 mV higher than that of the intrinsic alloy Al86Ni6Y4.5Co2La1.5,and the corrosion current density decreases by 1.5 orders of magnitude.The Al-based amorphous coating prepared with optimized components has a porosity of only 0.5%and excellent corrosion resistance performance in 3.5%NaCl solution,with obvious self-passivation behavior and a wide passivation interval.

关 键 词：铝基非晶涂层 微合金设计 非晶形成能力 缓蚀 钝化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]