Hydrogen diffusivity in Fe-40 at.%Al alloy

Chem. Met. Alloys 1 (2008) 227-234

https://doi.org/10.30970/cma1.0043

Marian KUPKA, Karol STĘPIEŃ

Hydrogen diffusivity in iron aluminide (Fe-40 at.% Al) was studied using the electrochemical permeation technique at various cathode current densities. The effective diffusion coefficient was evaluated using the time-lag method. The changes in hydrogen diffusivity in the studied alloy were interpreted based on the observed changes in the charging conditions and the membrane structure.

The permeation curves for the Fe-40 at.% Al alloy at different values of cathode polarisation current density : a – i_c = 2.55·10^-3 A/m², b – i_c = 5.10·10^-3 A/m², c – i_c = 9.55·10^-3 A/m², d – i_c = 12.74·10^-3 A/m², e – i_c = 19.11·10^-3 A/m².

Keywords

Iron aluminides / Electrolytic charging / Hydrogen diffusivity