软装设计用铜合金的表面Ni-W-P镀层与性能研究  

Study on surface Ni-W-P coating and properties of copper alloy for soft decoration design

作　　者：杨凱智 宗彦[1] 吴克凡 Yang Kaizhi;Zong Yan;Wu Kefan(Changchun University of Architecture and Civil Engineering,Changchun 130604,China;Jilin University,Changchun 130012,China)

机构地区：[1]长春建筑学院,吉林长春130604 [2]吉林大学,吉林长春130012

出　　处：《电镀与精饰》2024年第5期65-71,共7页Plating & Finishing

基　　金：吉林省自然科学基金(20170101252JC);2023年度吉林省高教科研课题(JGJX2023D725)。

摘　　要：针对软装设计用铜合金复杂服役环境的使用需求,为解决铜合金表面硬度低、耐腐蚀性能差等问题,采用化学镀的方法在软装设计用铜合金表面制备了Ni-W-P镀层。研究了Na_(2)WO_(4)浓度对化学镀层沉积速率、表面形貌、物相组成、硬度和耐腐蚀性能的影响。结果表明:随着Na_(2)WO_(4)浓度从15 g/L增加至65 g/L,铜合金表面镀层的沉积速率先增后减,在Na_(2)WO_(4)浓度为35 g/L时取得最大值。镀层中P元素含量逐渐减小,W元素含量先增加后减小。不同Na_(2)WO_(4)浓度的镀层中都可见Ni和Ni_(5)P_(4)衍射峰,镀层硬度高于未添加Na_(2)WO_(4)的镀层。且随着Na_(2)WO_(4)浓度增加,镀层硬度先增后减,在Na_(2)WO_(4)浓度为35 g/L时取得最大值。随着Na_(2)WO_(4)浓度从15 g/L上升至65 g/L,铜合金表面镀层的腐蚀电位先正向移动后负向移动,腐蚀电流密度先减小后增大。在Na_(2)WO_(4)浓度为35 g/L时,取得腐蚀电流密度最小值和电荷转移电阻最大值。电化学阻抗谱与极化曲线测试结果相吻合,Na_(2)WO_(4)浓度为35 g/L时具有最佳的耐腐蚀性能。In response to the complex service environment requirements of copper alloys used in soft decoration design,in order to solve the problems of low surface hardness and poor corrosion resistance of copper alloys,a Ni-W-P coating was prepared on the surface of copper alloy for soft decoration design using chemical plating method.The effects of Na_(2)WO_(4) concentration on the deposition rate,surface morphology,phase composition,hardness,and corrosion resistance of the chemical coating were studied.The results show that as the concentration of Na_(2)WO_(4) increases from 15 g/L to 65 g/L,the deposition rate of the copper alloy surface coating first increases and then decreases,the maximum value is achieved at a Na_(2)WO_(4) concentration of 35 g/L.The P element content in the coating gradually decreases,while the W element content first increases and then decreases.Ni and Ni_(5)P_(4) diffraction peaks can be observed in coatings with different concentrations of Na_(2)WO_(4).The hardness of the coating is higher than that of the coating without Na_(2)WO_(4) added.As the concentration of Na_(2)WO_(4) increases,the hardness of the coating first increases and then decreases,reaching its maximum value at a Na_(2)WO_(4) concentration of 35 g/L.As the concentration of Na_(2)WO_(4) increases from 15g/L to 65 g/L,the corrosion potential of the copper alloy surface coating first moves forward and then moves negative,and the corrosion current density first decreases and then increases.When the concentration of Na_(2)WO_(4) is 35 g/L,the minimum corrosion current density and the maximum charge transfer resistance are obtained.The electrochemical impedance spectrum and polarization curve test results are consistent,indicating that Na_(2)WO_(4) has the best corrosion resistance when the concentration is 35 g/L.

关 键 词：铜合金 Na_(2)WO_(4)浓度 Ni-W-P镀层 显微形貌 耐腐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]