Hydrogen penetration rates of iron. Effect of halide ions, hydrogen sulfide and hexynol

Publisher Website
Google Scholar
Abstract
The effect of the halides (Cl−, Br− and I−) on the rates of the hydrogen evolution reaction (h. E. R.) and hydrogen penetration (h. P.) of iron in H2SO4 is determined. The H. E. R. and H. P. of Fe in these same electrolytes with the addition of H2S are also studied. The inhibition of corrosion and h. p. in the H2S environment by hexynol are compared. With halide addition her., icorr and h. p. decreased in the following order, Cl−> Br−> I−. H2S catalyzed both the h. e. r. and h. p. The catalytic activity does not appear dependent on the H2S concentration for the H. E. R. but does for H. P. The fraction of hydrogen generated which is absorbed by Fe is greater during corrosion when a new surface is formed continuously than during cathodic polarization. The addition of the acetylenic alcohol, hexynol, in H2SO4 containing H2S and halides inhibited the h. e. r. corrosion and h. p.
Keywords