引用本文:吕威闫,王晓明,常青,邱实,杨番,杨柏俊.微合金化对铝基非晶合金涂层耐蚀性能的影响[J].中国表面工程,2019,32(6):73~80
LV Weiyan,WANG Xiaoming,CHANG Qing,QIU Shi,YANG Fan,YANG Baijun.Effects of Microalloying on Corrosion Resistance of Al-based Amorphous Coating[J].China Surface Engineering,2019,32(6):73~80
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微合金化对铝基非晶合金涂层耐蚀性能的影响
吕威闫1, 王晓明2, 常青2, 邱实3, 杨番4, 杨柏俊1
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
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。
关键词:  铝基非晶涂层  微合金设计  非晶形成能力  缓蚀  钝化
DOI：10.11933/j.issn.1007-9289.20190507004
分类号:TG174.4
基金项目:国家重点研发计划（2018YFB1105803）
Effects of Microalloying on Corrosion Resistance of Al-based Amorphous Coating
LV Weiyan1, WANG Xiaoming2, CHANG Qing2, QIU Shi3, YANG Fan4, YANG Baijun1
1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Shenyang 110016, China;2.National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China;3.Structure Corrosion Protection and Control of Aviation Science and Key Laboratory, China Special Vehicle Research Institute, Jingmen 448035, China;4.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
Abstract:
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.
Key words:  Al-based amorphous coating  microalloying design  glass forming ability  corrosion inhibition  passivation
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