摘要
[目的]在铀钛合金基体上直流电镀Zn–Ni合金,以提高铀钛合金的耐蚀性。[方法]以镀层外观为评价指标,通过四因素三水平正交试验对电流密度、温度和pH进行优化,分析了较优工艺条件下所得Zn–Ni合金镀层的外观、形貌、元素组成、物相及耐蚀性。[结果]电镀Zn–Ni合金的较优工艺条件为:pH 4.8或5.2,电流密度3 A/dm^(2),温度55℃。较优条件下所得Zn–Ni合金镀层都较为致密,由大小基本一致的微米级球状晶粒组成,都是单一的γ相结构。pH为4.8时所得Zn–Ni合金镀层比pH为5.2时具有更佳的耐蚀性。[结论]本文的研究结果可为铀钛合金表面电镀Zn–Ni合金的大规模生产及产品耐蚀性调控提供理论依据。
[Objective]Zn–Ni alloy was prepared on U–Ti alloy substrate by direct-current electroplating to improving its corrosion resistance.[Method]Taking the appearance of Zn–Ni alloy coating as the evaluation index,the current density,temperature,and pH during the electroplating process were optimized through orthogonal experiments with four factors and three levels.The appearance,morphology,elemental composition,phase constitution,and corrosion resistance of Zn–Ni alloy coating electroplated under the optimized process conditions were analyzed.[Result]The process conditions of Zn–Ni alloy electroplating were optimized as follows:pH 4.8 or 5.2,current density 3 A/dm^(2),and temperature 55℃.The Zn–Ni alloy coating electroplated under the optimized conditions were all compact,composed of micron-sized spherical grains with similar size,and featured singleγ-phase structure.The Zn–Ni alloy coating electroplated at pH of 4.8 had better corrosion resistance than that electroplated at pH of 5.2.[Conclusion]The research results of this paper can provide theoretical basis for the large-scale production of Zn–Ni alloy electroplating on U–Ti alloy substrate and the corrosion resistance regulation of products.
作者
张博君
李涛
郭洪
王志斌
杜艳华
韩强
ZHANG Bojun;LI Tao;GUO Hong;WANG Zhibin;DU Yanhua;HAN Qiang(School of Materials Science and Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;Inner Mongolia Key Laboratory of New Metal Material,Baotou 014010,China;Key Laboratory of CNNC New Materials Research and Application Development,CNNC North Nuclear Fuel Element Co.,Ltd.,Baotou 014030,China)
出处
《电镀与涂饰》
北大核心
2025年第1期57-61,共5页
Electroplating & Finishing
基金
中核新型材料研究与应用开发重点实验室开放课题(CG-KYFW-20230227-0399)。
关键词
铀钛合金
电镀
锌−镍合金
耐蚀性
正交试验
uranium titanium alloy
electroplating
zinc–nickel alloy
corrosion resistance
orthogonal experiment
