AISI 430不锈钢表面Co-Ni合金脉冲电沉积的过程  

Deposition of Co-Ni Alloy on AISI 430 Stainless Steel by Pulse Electroplating

作　　者：程付鹏 曹志颖[1] 文钟晟[1] 刘玲娟[1] 荆波[1] 孙俊才[1] 

机构地区：[1]大连海事大学材料工艺研究所船机修造工程交通行业重点实验室,辽宁大连116026

出　　处：《材料保护》2015年第7期11-14,共4页Materials Protection

基　　金：国家自然科学基金项目(21176034);中央高校基本科研业务费专项资金(3132014323)资助

摘　　要：改善固体氧化物燃料电池金属连接体用AISI 430不锈钢的抗氧化性能尤为重要。采用酸性镀液脉冲电镀的方法,在AISI 430不锈钢表面制备出微纳米结构的Co-Ni合金镀层,研究了脉冲电镀工艺及镀层的生长机制。用XRD对微纳米结构镀层的物相进行分析,用SEM观察了不同电镀工艺条件下镀层的形貌。结果表明:在Co-Ni合金共沉积形成过程中,Co2+,Ni2+在阴极发生异常共沉积,形成了Co/Ni异质形核;随着晶体的长大,部分晶体优先快速长大,形成较大的晶粒,大小晶粒混合布满整个表面,主要通过阶梯方式生长形成了Co-Ni合金。Co-Ni alloy coating with micro-nano structure was prepared on AISI 430 stainless steel by pulse electro- deposition in acidic electrolyte. The process of pulse electro-deposition and the growth mechanism of electro-deposition coating were analyzed. The phase composition of the coating with micro-nano structure was studied by X-ray diffractometry( XRD),and the microscopic morphologies of the coatings prepared at different electroplating process conditions were investigated by scanning electron microscopy( SEM).Results showed that the ions of Co2 +and Ni2 +were abnormally deposited into Co-Ni heterogeneous nucleation at the cathode.Part of the crystal grains preferentially grew rapidly so that crystal grains with the mixed sizes were distributed on the surface and the Co-Ni alloy was formed by the step growth mode.

关 键 词：脉冲电镀Co—Ni合金 沉积过程 生长形貌变化 AISI 430不锈钢 

分 类 号：TQ153.2[化学工程—电化学工业]