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

✍ Scribed by Ken Nobe; I. M. Pearson; Y. Saito

• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: German
• Weight: 595 KB
• Volume: 31
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.19800311002

✦ Synopsis

The effect o f the halides (Cl; Br-and I-) on the rates of the hydrogen evolution reaction (h. e. r.) and hydrogen penetration (h. p . ) o f iron in HzSO4 is determined. The h. e. r. and h. p. of Fe in these same electrolytes with the addition o f H2S are also studied. The inhibition of corrosion and h. p. in the H2S environment by hexynol are compared. With halide addition h. e. r., i,,, and h. p. decreased in the following order, CI-> Br->IT 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 f o r 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 o f the acetylenic alcohol, hexynol, in H2SO4 containing H2S and halides inhibited the h. e. r. corrosion and h. p..