Cl^- 对Zn-Fe族元素二元合金共沉积的催化作用(英文)  

Catalytic Effect of Cl^- on Electrodeposition of Binary Zinc Alloys With Iron group Metals

作　　者：印仁和[1] 方正华[1] 曹为民[1] A.ZAKARIA 周荣明[1] 

机构地区：[1]上海大学理学院化学系,上海宝山200436

出　　处：《电化学》2001年第1期85-89,共5页Journal of Electrochemistry

基　　金：SponsoredbyStateKeyLabforPhys.Chem .ofSolidSurface ;XiamenUniv .

摘　　要：在氯化物电解液中以定电量 (10C cm- 2 ) ,恒温 4 0℃电沉积Zn Fe族元素二元合金 .沉积产物用原子吸收光谱分析 .根据分析结果 ,作出相应的电流效率、百分含量及部分极化曲线 .镀层形貌采用扫描电镜 (SEM)观察 ,发现 :Zn Fe族元素合金的共沉积为异常共沉积 .Cl- 对铁族元素有催化作用 .随着Cl- 浓度的增加 ,降低了铁族元素的过电位 ,促进了铁族元素金属的沉积 .Zinc iron group metal alloys were deposited under coulostatic (10C.cm -2 ) at 40 ℃ chloride baths. The deposited alloys were quantitatively analyzed by Atomic Absorption Spectrometry. The current efficiency, percent content and partial polarization curves were obtained by the results. The morphology of the deposits was observed by means of Scanning Electron Microscopy(SEM). We observe that the electrodeposition of zinc iron group metal alloys is one of the best known examples of anomalous codeposition. We found the catalytic effect of Cl - on the electrodeposition behavior of iron group metal. Overpotential of iron group metal droped abruptly at high Cl - concentration, while transition current density of Zn increased gradually.

关 键 词：异常共沉积 催化作用 转移电流密度 镀层形貌 锌族元素 铁族元素 二元合金 氯离子 

分 类 号：O643.3[理学—物理化学]