摘要
针对金属镀层的耐蚀性需求,深入探究双向脉冲电沉积工艺中反向脉冲电流对镍镀层的耐腐蚀性提升机理,分析反向脉冲电流密度对于镍镀层的表面形貌、微观组织结构及耐腐蚀性能的影响。结果表明,加入一定程度的反向脉冲电流可细化晶粒,但较大的反向脉冲电流密度值会使得晶粒粗化,同时反向脉冲电流可抑制(111)晶面生长,促进(200)晶面生长。在反向脉冲电流作用下,可获得耐腐蚀性能优于单向脉冲电沉积工艺的镍镀层。
In view of the increasing demand for corrosion resistance,this article systematically investigated the fundamental mechanism of reverse pulse current in improving corrosion resistance during bidirectional pulse electrodeposition.The effect of reverse pulse current density on the surface morphology,microstructure and corrosion resistance of nickel coating were analyzed.Experimental result revealed that controlled reverse pulse current application achieves grain refinement,while excessive current density value conversely induces grain coarsening.Furthermore,the reverse pulse demonstrates obvious suppressing effect for(111)plane development while preferentially promoting of(200)plane growth.Thus,nickel coating with better corrosion resistance than that of unidirectional pulse electrodeposition process can be obtained under the action of reverse pulse current.
作者
徐坤
刘建国
张朝阳
王京涛
刘洋
XU Kun;LIU Jianguo;ZHANG Zhaoyang;WANG Jingtao;LIU Yang(Laser Technology Institute,School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;Institute of Engineering Technology,Jiangsu University,Zhenjiang 212016,China)
出处
《电加工与模具》
北大核心
2025年第6期42-47,共6页
Electromachining & Mould
基金
国家自然科学基金项目(52105449)
中国博士后科学基金项目(2024M751248)。
关键词
反向脉冲电沉积
纳米晶镍
耐腐蚀性
晶面取向
reverse pulse electrodeposition
nanocrystalline nickel
corrosion resistance
crystal orientation
