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
查看参考文献16篇
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文摘
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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(Al_(86)Ni_6Y_(4.5)Co_2La_(1.5))_(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Al_(86)Ni_6Y_(4.5)Co_2La_(1.5)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。 |
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其他语种文摘
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In order to obtain the Al-based amorphous surface protecting coating with excellent corrosion resistance, the composition system of Al-based amorphous alloy (Al_(86)Ni_6Y_(4.5)Co_2La_(1.5))_(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 Al_(86)Ni_6Y_(4.5)Co_2La_(1.5), 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. |
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来源
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中国表面工程
,2019,32(6):73-80 【核心库】
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DOI
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10.11933/j.issn.1007–9289.20190507004
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关键词
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铝基非晶涂层
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微合金设计
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非晶形成能力
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缓蚀
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钝化
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地址
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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
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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
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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
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沈阳工业大学材料科学与工程学院, 沈阳, 110870
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-9289 |
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学科
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金属学与金属工艺 |
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基金
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国家重点研发计划
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文献收藏号
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CSCD:6728406
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