Corrosion mechanisms of hydrogen sulfide

Hydrogen sulfide is an almost stable gas in the range of temperatures and pressures used in oil and gas exploitation systems, although in the presence of strong oxidants such as O2 and + Fe3, it can turn into elemental sulfur, which usually occurs in gas pipelines. It happens with high pressure or storage facilities. Hydrogen sulfide in concentrations higher than 80% is also found in some oil and gas reservoirs.