稳定剂及热处理对铝化学镀Ni-W-P合金的性能影响  

The influence of stabilizers and heat treatment on the properties of electroless plating Ni-W-P alloy on aluminum

作　　者：余祖孝[1] 郑德韬 郭洪[1] 刘勇[1] 罗元良[1] 邓超[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：《轻合金加工技术》2014年第11期64-68,共5页Light Alloy Fabrication Technology

基　　金：四川理工学院大学生创新创业训练计划项目(CX20130301);材料腐蚀与防护四川省重点实验室基金资助(2014CL03)

摘　　要：为了提高铝的耐磨性和耐腐蚀性能,用电化学方法等测试手段研究了稳定剂及热处理对铝基化学镀Ni-W-P合金镀层的孔隙率、沉积速度、失重腐蚀速度、腐蚀电流密度、腐蚀电位、显微硬度和耐磨性能的影响。结果表明,铝基体上化学镀Ni-W-P的合理单组分稳定剂是KI(1 mg/L)、二元复合稳定剂是"KIO3(1 mg/L)+Pb(Ac)2(1 mg/L)"。400℃1 h热处理后,镀层的硬度最高(897 HV),耐磨性最好,但是其耐蚀性较差。在200℃下热处理5 h,镀层显微硬度显著增加,高达924HV。试验结果为铝基体化学镀Ni-W-P提供了参考。To improve the wear resistance and anti-corrosion properties of the aluminum, investigation was made on the influence of heat treatment and stabilizers on the porosity, deposition rate, weight-loss corrosion rate, corrosion current density, corrosion potential, microhardness and wear resistance of electroless plating Ni-W-P alloy coating on aluminum by electrochemical methods, etc. The results show that the reasonable stabilizers used here, inelude KI（ 1 mg/L） and ＂KIO3 （ 1 mg/L） ＋ Pb（ Ac）2 （ 1 mg/L） ＂. Although the anti-corrosion properties of Ni-W-P alloy coatings is poor, its maximum hardness （ about 897 HV） and good wear-resistance are obtained when heated at 400℃ （ 1 h）. The higher microhardness of coating （924 HV） could also be obtained by prolonging the heat treatment time （ over 5 h） at 200℃. The test results set a reference for electreloss plating Ni-W-P on the base aluminum.

关 键 词：化学镀NI-W-P 热处理 稳定剂 耐腐蚀性 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]