氢在Zn-Ni-Cd合金镀层中的渗透特性  

Permeation Characteristics of Hydrogen in Electroplated Zinc-Nickel-Cadmium Alloy Coating

作　　者：李勇峰[1] 阚文彬[1] 王旭[1] 潘红良[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《材料保护》2013年第4期23-25,7,共3页Materials Protection

基　　金：国家自然科学基金(50875084)资助

摘　　要：氢吸附在金属表面和进入基体晶格会影响其性能,目前对氢的渗透特性研究不够。采用电化学氢渗透技术和计算机曲线拟合方法得到了氢在工业纯铁箔片中的有效扩散系数,并利用氢在工业纯铁箔片中的扩散系数与在Zn-Ni-Cd合金镀样中的扩散系数相差几个数量级的特点,求得了氢在Zn-Ni-Cd合金镀层中的扩散系数为2.111 4×10-10cm2/s,表观溶解度为6.398 5×10-4mol/cm3,为后续的Zn-Ni-Cd阻氢镀层特性研究提供了重要依据。The effective diffusion coefficient of hydrogen in pure iron foil was determined by electrochemical hydrogen permeation technique and computer curve fitting.Furthermore,the effective diffusion coefficient and apparent solubility of hydrogen in Zn-Ni-Cd alloy coating were approximately calculated to be 2.111 4×10-10 cm2/s and 6.398 5×10-4 mol/cm3,based on the characteristic that the difference in the diffusion coefficient of hydrogen in pure iron foil and Zn-Ni-Cd alloy coating was up to several orders of magnitude.

关 键 词：氢扩散 扩散系数 表观溶解度 纯铁箔片 Zn-Ni—Cd镀层 

分 类 号：TQ153.2[化学工程—电化学工业]