胡椒醛在电镀Zn-Fe合金中的应用  

Application of Heliotropin in Zn-Fe Alloy Electroplating

作　　者：廖崇静[1] 王星[1] 常红[1] 李建芬[1] 周晓荣[1] 

机构地区：[1]武汉工业学院化学与环境工程学院,湖北武汉430023

出　　处：《电镀与精饰》2011年第5期9-12,共4页Plating & Finishing

基　　金：湖北省教育厅项目(B20081804);校立青年项目(09Q03);校级大学生创新性实验计划项目资助(CX200919)

摘　　要：以硫酸亚铁和氯化锌为主盐配制电镀锌-铁合金溶液。运用小槽试验和电化学测试,研究了胡椒醛对镀层的外观、组成、耐腐蚀性能以及微观形貌的影响。结果表明,在θ为20℃,pH为4.5,Jκ为2.0A/dm2的条件下,胡椒醛的加入使得镀层更加平整、致密,但质量浓度高于0.2g/L,对改善镀层的平整性作用不大。电化学测试数据显示,在ρ(胡椒醛)为0.6g/L时,耐腐蚀能力比基础镀液所得镀层的耐腐蚀能力明显增强。胡椒醛对于改善锌-铁合金镀层的表面微观形貌作用不明显,镀层中铁的质量分数随着胡椒醛的增加而降低,镀层沉积速率也随之减小,与理论分析结果一致。Ferrous sulfate and zinc chloride were used in preparation of bath solution for Zn-Fe alloy electroplating.Effects of heliotropin on appearance,composition,corrosion resistance and micromorphology of the deposit were studied by small-bath-electroplating and electrochemical tests.It showed that coating became smoother and denser with addition of heliotropin under condition of θ 20℃,pH 4.5 and Jκ 2.0A/dm2;but leveling performance didn＇t become better when heliotropin concentration was more than 0.2g/L.Data of electrochemical tests revealed that when heliotropin concentration was 0.6g/L,corrosion resistance could be improved obviously;heliotropin put little effect on the improvment of coating micromorphology;iron content and deposition rate of coating would decrease with heliotropin coneentration increasing,this is coincident with theoretical analysis.

关 键 词：电镀 ZN-FE合金 耐腐蚀性能 胡椒醛 

分 类 号：TQ153.2[化学工程—电化学工业]