热处理温度对电镀Ni-Co-P镀层的性能影响  

Effect of heat treatment on the coating properties of electrodeposited Ni-Co-P alloy

作　　者：丁耀 沈岳军 付定国 刘定富[2] Ding Yao;Shen Yuejun;Fu Dingguo;Liu Dingfu(Guizhou Space Appliance Co.,Ltd.,Guiyang 550025,China;College of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州航天电器股份有限公司,贵州贵阳550025 [2]贵州大学化学与化工学院,贵州贵阳550025

出　　处：《电镀与精饰》2024年第8期25-29,共5页Plating & Finishing

摘　　要：热处理是常用的一种提高镀层性能的方法。本文采用了一种新型的电镀Ni-Co-P配方在黄铜片上制备了镀层,然后将制得的镀层在不同温度下进行热处理,并结合扫描电子显微镜、X射线衍射、维氏硬度计和电化学工作站对镀层表面形貌、组织结构、硬度及耐蚀性能进行了测试分析。结果表明,热处理使镀层逐渐由非晶态转化为晶态镀层,当热处理温度为400℃时,镀层的表面平整、致密,无明显缺陷,镀层硬度从475.4 HV增加到最大值662.5 HV,腐蚀电位为-0.222 V,腐蚀电流密度为2.44×10^(-8) A·cm^(-2),镀层性能达到最佳。Heat treatment is a common method to improve the properties of coating.In this paper,a new Ni-Co-P electroplating formula was used to prepare the coating on the brass plate,and then the obtained coatings were heat treated at different temperatures.The surface morphology,microstructure,hardness and corrosion resistance of the coating were tested and analyzed by scanning electron microscopy,X-ray diffraction,vickers hardness tester and electrochemical workstation.The results show that the coating is gradually transformed from amorphous to crystalline by heat treatment.When the heat treatment temperature is 400℃,the surface of the coating is flat,compact and without obvious defects.The hardness of the coating increases from 475.4 HV to 662.5 HV,and the corrosion potential is-0.222 V,the corrosion current density is 2.44×10^(-8) A·cm^(-2) and the coating performance is the best.

关 键 词：热处理 Ni-Co-P镀层 硬度 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]