基于RSM-BBD的Ni-Cu-P/CeO_(2)镀层的制备与性能  

Preparation and properties of Ni-Cu-P/CeO_(2) coating based on RSM-BBD

作　　者：杨强 吕小虎 刘定富[1] 姚助 YANG Qiang;LÜXiao-hu;LIU Ding-fu;YAO Zhu(School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025

出　　处：《材料热处理学报》2022年第5期177-185,共9页Transactions of Materials and Heat Treatment

摘　　要：在化学镀Ni-Cu-P三元镀层的基础上,向镀液中加入CeO_(2)纳米颗粒,并采用响应面实验设计(RSM-BBD)进行镀液配方优化,利用最佳的配方制备了Ni-Cu-P/CeO_(2)复合镀层。采用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、电化学工作站和显微硬度仪等研究了复合镀层的表面形貌、微观组织结构、耐蚀性以及硬度。结果表明:Ni-Cu-P镀层和Ni-Cu-P/CeO_(2)复合镀层的表面光滑平整,没有胞状颗粒,复合镀层中有CeO_(2)颗粒镶嵌在其中,且复合镀层的晶粒更细小更致密;Ni-Cu-P镀层的硬度和孔隙率分别为479.1 HV0.1和0.12,加入CeO_(2)颗粒后复合镀层的硬度增加,孔隙率更低,分别为678.7 HV0.1和0.04;极化曲线测试结果表明,Ni-Cu-P/CeO_(2)复合镀层的耐蚀性比Ni-Cu-P镀层的耐蚀性更好,其腐蚀电位和腐蚀电流密度分别为-0.559 V和7.943×10^(-8)A·cm^(-2)。On the basis of electroless Ni-Cu-P ternary coating, CeO_(2)nanoparticles were added into the bath, and the bath formula was optimized by response surface method box-behnken design(RSM-BBD). Ni-Cu-P/CeO_(2)composite coating was prepared by using the best formula, and surface morphology, microstructure, corrosion resistance and hardness of the composite coating were studied by means of scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) analysis, X-ray diffractometer(XRD), electrochemical workstation and microhardness tester. The results show that the surface of the Ni-Cu-P coating and Ni-Cu-P/CeO_(2)composite coating is smooth and flat without cellular particles, the CeO_(2)particles are embedded in the composite coating, and the grains of the composite coating are finer and denser. The hardness and porosity of the Ni-Cu-P coating are 479.1 HV0.1 and 0.12, respectively, and after adding CeO_(2)particles, the hardness of the composite coating increases and the porosity decreases, which are 678.7 HV0.1 and 0.04, respectively. The polarization curve test results show that the corrosion resistance of the Ni-Cu-P/CeO_(2)composite coating is better than that of the Ni-Cu-P coating, and its corrosion potential and corrosion current density are-0.559 V and 7.943×10^(-8)A·cm^(-2), respectively.

关 键 词：Ni-Cu-P/CeO_(2)复合镀层 化学镀 CeO_(2)颗粒 响应面实验设计 耐蚀性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]