Hydrogen permeation in iron at different temperatures

Study of the hydrogen diffusion and segregation into Fe–C–Mo martensitic HSLA steel using electrochemical permeation test

“…Figure 12a exhibits the influence of the temperature on the permeation curves. As it is classically reported in the literature, the breakthrough time decreases while the steady-state current increases [42]. Table 3 However, the variation of <C> calculated from equation (8) shows that it relies on the charging conditions, temperature and some more parameters.…”

“…Table 3 However, the variation of <C> calculated from equation (8) shows that it relies on the charging conditions, temperature and some more parameters. It has already been reported that an oxide layer formed on the exit side of the membrane has a real influence on solubility [6,7,27] m²/s for pure Armco iron [42] to D 0app =1.33x10 -6 m²/s for quenched martensite [46]. The activation energy of diffusion process has been reported to vary from E D =0.20eV for pure Armco iron [42] to E D =0.36 eV for quenched martensite [46], or E D =0.35eV…”

Effects of environmental conditions on hydrogen permeation of X52 pipeline steel exposed to high H2S-containing solutions

“…The fact that the corrosion rates in both solutions A and B at 35°C are higher than those at other temperatures can be attributed to the interfacial reaction and the corrosion scale [22]. On the one hand, the interfacial reaction becomes more severe with temperature since the apparent hydrogen solubility increases with temperature in the range of 25-80°C.…”

“…To analyse the corrosion reaction on the surface of the hydrogen input side, the hydrogen diffusion coefficients, D eff (cm 2 /s), at four different temperatures were measured from the time-lag method using the standard Devanathan-Stachurski cell [18,22]. In the standard Devanathan-Stachurski cell, a constant current for hydrogen charging was adopted to reduce the hydrogen ions.…”

Effect of electrodeposition parameters on the hydrogen permeation during Cu–Sn alloy electrodeposition

“…The diffusion of hydrogen can markedly deteriorate various properties of steels, which has attracted the interest of researches [5][6][7][8][9][10][11]. It was proved that the diffused hydrogen would react with the metal atoms to form brittle metal hydride, leading to the failure of structure even under the applied stresses far below the yield strength [5].…”