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 –
ic = 2.55·10-3 A/m2,
b – ic = 5.10·10-3 A/m2,
c – ic = 9.55·10-3 A/m2,
d – ic = 12.74·10-3 A/m2,
e – ic = 19.11·10-3 A/m2.
Keywords
Iron aluminides / Electrolytic charging /
Hydrogen diffusivity