基于响应面法的锌-铁-锰合金脉冲电沉积工艺优化  

Optimization of pulsed electrodeposition of zinc-iron-manganese alloy based on response surface method

作　　者：王琳 黄昊天 周宏桥 杨海丽 WANG Lin;HUANG Haotian;ZHOU Hongqiao;YANG Haili(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《电镀与涂饰》2024年第10期31-40,共10页Electroplating & Finishing

基　　金：国家自然科学基金(51474088)。

摘　　要：[目的]采用脉冲电沉积法在Q235钢表面制备Zn-Fe-Mn合金,以提高低碳钢的耐蚀性。[方法]先通过单因素实验研究了不同因素对Zn-Fe-Mn合金镀层耐蚀性的影响,然后以主要影响因素──pH、电流密度和温度为因子,镀层在3.5%Na Cl溶液中的腐蚀电流密度为响应值,采用响应面法对电沉积工艺进行优化,并建立了各因子与腐蚀电流密度之间的回归模型。[结果]电沉积Zn-Fe-Mn合金的较优工艺参数为:脉冲频率1000 Hz,占空比0.2,pH 6.0,电流密度62.60 mA/cm^(2),温度29℃,时间30 min。在较优条件下所得Zn-Fe-Mn合金镀层的实测腐蚀电流密度为2.26μA/cm^(2),与模型预测值仅相差1.80%。[结论]本文建立的回归模型可靠,可用于Zn-Fe-Mn合金电沉积工艺参数的优化,为开发高性能镀层提供理论支持。[Introduction]The pulsed electrodeposition of Zn-Fe-Mn alloy coating was carried out on the surface of Q235 mild steel to improve its corrosion resistance.[Method]The effects of different factors on the corrosion resistance of Zn-Fe-Mn alloy coating were studied firstly by single-factor experiments.The electrodeposition process was then optimized by response surface method with the pH,current density,and temperature as key factors and the corrosion current density of Zn-Fe-Mn alloy coating measured in 3.5%NaCl solution as the response.A regression model representing the relationship between all the factors and corrosion current density was established.[Result]The optimal process parameters for electrodeposition of Zn-Fe-Mn alloy were determined as follows:pulse frequency 1000 Hz,duty cycle 0.2,pH 6.0,current density 62.60 mA/cm^(2),temperature 29℃,and time 30 min.The actual corrosion current density of the Zn-Fe-Mn alloy coating electrodeposited under the optimized conditions was 2.26μA/cm^(2),which differed from the model-predicted value by only 1.80%.[Conclusion]The regression model established in this study is reliable and can be used for optimizing the pulse electrodeposition process of Zn-Fe-Mn alloy,providing theoretical support for the development of high-performance coatings.

关 键 词：锌-铁-锰合金 脉冲电沉积 耐蚀性 响应面法 

分 类 号：TQ153.2[化学工程—电化学工业]