电流密度对硫酸盐镀锌层性能的影响  

Effect of current density on properties of zinc coating electroplated from a sulfate bath

作　　者：邢乐红[1,2] 黎德育[2] 李宁[2] 崔术新[1] 

机构地区：[1]牡丹江师范学院化学化工学院,黑龙江牡丹江157012 [2]哈尔滨工业大学化工学院,黑龙江哈尔滨150001

出　　处：《电镀与涂饰》2016年第8期394-397,共4页Electroplating & Finishing

基　　金：牡丹江师范学院博士科研启动基金项目(MSB201208);牡丹江师范学院国家级重点创新预研项目(GY201201);黑龙江省青年科学基金项目(QC2014C009);牡丹江市科学技术计划项目(G2013f1407)

摘　　要：采用由90 g/L Zn^(2+)和6 g/L浓硫酸组成的镀锌液,在电流密度3~9 A/dm^2和温度50°C的条件下电镀锌475 s。分析了电流密度对镀锌层表观质量(明度)、微观形貌和耐蚀性的影响。结果表明,随电流密度增大,镀锌层的表观质量、微观形貌和耐蚀性均先改善后变差。当电流密度为4 A/dm2时,镀锌层的厚度为10μm,综合性能最好。Zinc electroplating was carried out in a bath containing 90 g/L Zn^2＋ and 6 g/L concentrated sulfuric acid under the following conditions： current density of 3-9 A/dm^2, temperature 50 °C, and time 475 s. The effect of current density on the properties of zinc coating including apparent quality（luminosity）, microscopic morphology and corrosion resistance was analyzed. The results showed that the apparent quality, microscopic morphology and corrosion resistance of zinc coating are improved initially and then decreased with the increasing of current density. The zinc coating obtained at a current density of 4 A/dm^2 has a thickness of 10 μm and the best comprehensive performance.

关 键 词：低碳钢 硫酸盐镀锌 电流密度 明度 微观形貌 耐蚀性 

分 类 号：TQ153.15[化学工程—电化学工业]