电流密度和热处理温度对Ni-Fe-P合金镀层性能的影响  

Effect of Current Density and Heat Treatment on Properties of Ni-Fe-P Electroplating

作　　者：周琦[1] 张洪艳[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159

出　　处：《电镀与精饰》2015年第2期8-12,共5页Plating & Finishing

摘　　要：以Ni-Fe-P合金镀层为对象，研究了电流密度及热处理温度对镀层的硬度、耐磨性、表面形貌、抗盐雾性能及电化学腐蚀行为的影响。结果表明，当Jk为5A／dm。时，镀层显微硬度最大，达787 HV；当Jk为3—4 A／dm2时，磨损量较小；当Jk为6 A／dm2时，镀层的摩擦系数较小；综合盐雾试验和极化曲线可知，当Jk为2～4A／dm2时，耐蚀性较好。未热处理时，镀层微观形貌呈现胞状物，450℃热处理后，镀层胞状物消失，出现菜花状晶粒，硬度和耐蚀性较好；当热处理9为150℃时，镀层的磨损量最低，外观为光亮的银白色。The effects of current density and heat treatment temperature on the hardness, wear resistance, corrosion resistance and electrochemical corrosion behavior of Ni-Fe-P alloy deposits were studied. The maximum micro-vickers hardness could reach up to 787 HV at 5 A/dm2 when the current density was between 2 A/dm2 and 8 A/dm2. The best wear resistance with minimum abrasion amount was obtained at 3 -4 A/dm2. The friction coefficient of the coatings was low when the current density was 6 A/dm2. Salt spraying test and electrochemical corrosion curves confirmed that the best corrosion resistance was achieved at 2 - 4 A/dm2. The morphology of Ni-Fe-P deposits grains was cell-like without heat treatment, but it was cauliflower-like after 450℃ heat treatment. When the heat treatment temperature was varied from 150℃ to 600℃, the best hardness and corrosion resistance were obtained at 450℃ The deposits had the lowest dry grinding amount at 150℃ with color of bright silver.

关 键 词：电镀 NI-FE-P合金 电流密度 热处理温度 镀层性能 

分 类 号：TQ153.2[化学工程—电化学工业]