双相纳米粒子体系对化学镀Ni-P-ZrO_(2)复合镀层性能的影响  

Effect of biphasic nanoparticles system on performance of electroless Ni-P-ZrO_(2) composite coatings

作　　者：苏琪 刘军松 刘定富[1] 吕小虎 SU Qi;LIU Jun-song;LIU Ding-fu;Lü Xiao-hu(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》2021年第6期163-171,共9页Transactions of Materials and Heat Treatment

摘　　要：研究了不同特性纳米粒子的加入对化学镀Ni-P-ZrO_(2)复合镀层性能的影响。首先采用正交实验并以镀层孔隙率与硬度值为评价指标确定了基础镀液中不同纳米粒子与ZrO_(2)复配添加量,以及镀液主要成分与工艺参数(表面活性剂、缓冲剂、pH)的最优量。通过维氏硬度计、电化学工作站、扫描电镜(SEM)、透射电镜(TEM)及X射线衍射仪(XRD)等对各双相纳米粒子体系制备的复合镀层性能进行表征分析。结果表明:添加不同性能纳米粒子对化学镀Ni-P-ZrO_(2)复合镀层性能的影响不同,复配纳米粒子体系制备的复合镀层性能比单一Ni-P-ZrO_(2)化学复合镀层的性能更加优异,晶粒更加细化。其中,化学镀Ni-P-ZrO_(2)-SnO_(2)复合镀层的自腐蚀电位最大,自腐蚀电流最低,维氏硬度最高达440.1 HV0.1,镀层表面光滑平整致密。Effect of the addition of nanoparticles with different characteristics on performance of electroless Ni-P-ZrO_(2)composite coatings was studied.Firstly,using orthogonal experiments and the porosity and hardness of the coating were employed as evaluation indexes to determine the amount of different nanoparticles mixed with ZrO_(2)in the base bath,and the optimal amount of the main components and process parameters of the bath(surfactant,buffer,pH).The properties of the composite coatings prepared with different biphasic nanoparticles system were characterized and analyzed by means of Vickers hardness tester,electrochemical workstation,scanning electron microscopy,transmission electron microscopy and X-ray diffractometer.The results show that the effects of adding different nanoparticles on the properties of electroless Ni-P-ZrO_(2)composite coatings are different,and the properties of the composite coatings prepared with biphasic nanoparticles system are better than that of single Ni-P-ZrO_(2)electroless composite coatings,and the grain size is finer.Among them,the electroless Ni-P-ZrO_(2)-SnO_(2)composite coating has the highest self corrosion potential,the lowest self corrosion current,the highest Vickers hardness of 440.1 HV0.1,and the coating surface is smooth and dense.

关 键 词：化学复合镀 硬度 性能 孔隙率 

分 类 号：TG174.44[金属学及工艺—金属表面处理]