HYDROGEN SOLUBILIZATION INTO AND PERMEATION THROUGH WALL MATERIALS

The dependance on upstream pressure (1.3 × 10-3 ≤ p1 ≤ 4 × 104 Pa, i.e. 10-5 ≤ p1 ≤ 300 torr) of hydrogen permeation through very pure iron, investigated at temperatures 70 °C ≤Tm ≤ 400 °C, agrees with a previously presented theory. Data for DK (diffusion and solubility constants), D1and the rate of dissociative solution are given. Measurements with membranes exposed to H atoms confirm our contention that large concentration and internal pressure increases occur. © 1979.