on a bipolar electrode-membrane in 0.5 M S
solutions (pH 1.30) by cyclic potential pulses. Expressions that allow one to calculate the hydrogen coverage on the iron surface (
) as a function of the potential variation in a cyclic stepwise manner and also the hydrogen concentration in the near-surface metal layer (C) as a func-
tion of variations in the intensity of the diffusion flow of hydrogen atoms in the membrane are given. The
method of cyclic potential pulses together with the analysis of solutions for metal ions shows that the iron dis-
solution rate substantially decreases as
increases. A bipolar electrode-membrane allowed the determination of the C intervals corresponding to the inhibition of iron dissolution (at C < Cc
3 
10–8 g-at/cm3), the acti-vating effect of hydrogen absorbed by the metal on the anodic process (for C > Cc), and the metal destruction
(for C >> Cc). The absorbed hydrogen is assumed to accelerate the ionization of iron due to the formation of
new dissolution sites as a result of plastic deformations of the metal. Thus, the effects of two forms of sorbed
hydrogen on the iron dissolution are separated.