电流密度和超精加工对桑塔纳轿车减振器连杆耐蚀性的影响  

Effect of Current Density and Superfinish on the Corrosion Resistance of Piston Rods in Santana Shock Absorber

作　　者：程先华[1] 高远[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《上海交通大学学报》2003年第1期133-136,共4页Journal of Shanghai Jiaotong University

基　　金：教育部跨世纪优秀人才培养计划资助项目 ;中国科学院兰州化学物理研究所固体润滑国家重点实验室基金资助项目 (0 10 2 )

摘　　要：通过不同电镀工艺参数条件下对减振器连杆进行镀铬处理 ,用盐雾试验和电解腐蚀试验评价其耐腐蚀性能 ,研究了电流密度和超精加工对桑塔纳轿车减振器连杆耐蚀性的影响 .结果表明 ,连杆的最佳电镀工艺参数 :电流密度为 5 6～ 5 8A/ dm2、电镀时间为 2 2 min.电流密度为 5 8A/ dm2 以下 ,镀层吸氢量明显低于电流密度为 60 A/ dm2 、63A/ dm2 的镀层 ,吸氢速度平缓 ,镀铬层内应力小 .Corrosion resistance of piston rods that were treated with different plating processes was evaluated by salt spray test and electrolytic corrosion test. By this way, the effects of current density and superfinish on the corrosion resistance of piston rods in Santana shock absorbers were investigated and established. The optimizing plating parameters are suggested as: current density 56-58 A/dm2 and plating time 22 min. Chromium plating layers formed under the current density of 58 A/dm2 have less Hydrogen than those under current density of 60 A/dm2 or 63 A/dm2. Besides, the former has stable and slower Hydrogen-absorbing speed and less internal stress. Superfinish process on the surface of piston rods in shock absorbers before plating can improve the corrosion resistance of piston rods significantly. The result provides an effective way for optimizing the present plating process and promoting the manufacturing level of automobile shock absorbers.

关 键 词：减振器 连杆 耐蚀性 桑塔纳轿车 电流密度 超精加工 镀铬工艺 

分 类 号：U463.335.1[机械工程—车辆工程] TQ153.11[交通运输工程—载运工具运用工程]