Studies on hydrogen diffusivity in iron aluminides using the Devanathan-Stachurski method

被引:14
|
作者
Kupka, Marian [1 ]
Stepien, Karol [1 ]
Nowak, Katarzyna [1 ]
机构
[1] Univ Silesia, Inst Mat Sci, PL-40007 Katowice, Poland
关键词
Intermetallic compounds; Diffusion; Electrochemical properties; Surface properties; FE-AL ALLOYS; PERMEATION; ABSORPTION; TRANSPORT; FE-40AL; METALS; NICKEL;
D O I
10.1016/j.jpcs.2013.10.009
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An electrolytic method for cathodic hydrogen saturation developed by Devanathan and Stachurski was successfully used to study hydrogen diffusivity in iron aluminides. Both an appropriate electrolyte and a saturating current density are required for this method. A proper form of the saturation curve was only obtained with 35% NaCl electrolyte, which removed the oxide film blocking hydrogen penetration without further corrosive destruction of the iron aluminide. The optimum saturation current density for determining the most reliable diffusivity was 1.91 A/cm(2), yielding D-eff,D-H = 4.81 x 10(-6) cm(2)/s for Fe-40 at.% Al. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:344 / 350
页数:7
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