BOUNDARY-CONDITIONS IN ELECTROCHEMICAL MEASUREMENTS OF DIFFUSION-COEFFICIENTS OF HYDROGEN IN ALPHA-PALLADIUM

被引:6
作者
HAGI, H [1 ]
机构
[1] KYUSHU UNIV,FAC ENGN,DEPT IRON & STEEL MET,FUKUOKA 812,JAPAN
来源
MATERIALS TRANSACTIONS JIM | 1990年 / 31卷 / 10期
关键词
boundary condition; diffusion coefficient; electrochemical permeation method; hydrogen; palladium; temperature dependence;
D O I
10.2320/matertrans1989.31.842
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The boundary conditions in electrochemical hydrogen permeation through a-palladium have been examined. In the permeation experiment, the variation in electrode potential and current density at the cathode surface have been found to correspond to those in dissolved hydrogen concentration and hydrogen entry flux at the cathode surface, respectively. The diffusion coefficients of hydrogen in the temperature range between 278 and 333 K have been determined. The temperature dependence of the diffusion coefficient of hydrogen free from the trapping effect and the surface effect in annealed a-palladium specimens is given by DH (m2/s) = 2.40×10-7 exp (-21.6 (kJ/mol)/RT). © 1990, The Japan Institute of Metals. All rights reserved.
引用
收藏
页码:842 / 847
页数:6
相关论文
共 22 条