硝酸铈及热处理对化学镀Ni-W-P合金的性能影响  

Influences of Ce( NO_3)_3 and heat treatment on properties of electroless plating Ni-W-P alloy

作　　者：余祖孝[1] 附青山[1] 郝世雄[1] 郭洪[1] 

机构地区：[1]四川理工学院材料与化学工程学院材料腐蚀与防护四川省重点实验室,四川自贡643000

出　　处：《化学研究与应用》2015年第5期696-699,共4页Chemical Research and Application

基　　金：材料腐蚀与防护四川省重点实验室开放基金项目(2014CL20)资助;四川理工学院人才引进项目(2012RC04)资助

摘　　要：为提高化学镀Ni-W-P镀层的耐蚀性和耐磨性,拓宽其应用,采用电化学方法和热处理等手段,研究了镀液中添加剂硝酸铈（ Ce（ NO3）3）的质量分数和热处理对化学镀Ni-W-P镀层的沉积速度、孔隙率、失重腐蚀速度、腐蚀电位、腐蚀电流、交流阻抗、显微硬度、摩擦系数等性能的影响。结果表明：添加1．0 wt%Ce（NO3）3时,所得镀层的沉积速度最大（36．5 g/m2·h）,孔隙率最低（0．8个/cm2）,耐腐蚀性能最好。镀层的组织均匀、致密、无缺陷和非晶态结构是其耐蚀性能高的重要原因。100~600℃热处理后,镀层硬度和耐磨性有所提高,而400℃热处理之后,合金显微硬度高达1100 HV,是镀态的1．8倍。Aimed at improving the anti-corrosion and wear resistance of electroless plating Ni-W-P alloy coatings,the influences of La（NO3）3and heat treatment on the deposition rate,porosity,weightless corrosion rate,corrosion potential,corrosion current,elec-trochemical impedance spectroscopy（ EIS） ,micro-hardness and friction coefficient of electroless plating Ni-W-P alloy coating,were investigated by using heat treatment and electrochemical methods,etc. The results show that the high deposition rate（36. 5 g/m2· h）,low porosity（0. 8 hole/cm2）and good anti-corrosion properties of electroless plating Ni-W-P are obtained,when 1. 0 wt%Ce （ NO3 ） 3 is added into plating solution. The dense,uniform,defect-free,amorphous structure is the most important aspects to improve corrosion resistance of alloy coatings. By heat treatment at 100~600℃,the hardness and wear resistance of coatings are obviously improved. After being heat treated at 400℃,the micro-hardness of the alloy coating is as high as 1100 HV,which is 1. 8 times of the as-plated Ni-W-P alloy.

关 键 词：化学镀NI-W-P 添加剂硝酸铈 热处理 耐蚀性 耐磨性 

分 类 号：O614.332[理学—无机化学]