Abstract
Oxygen injected into high pressure (650 kPa) geothermal steam containing high H 2S levels drastically increased the corrosion rate of carbon steel. At increasing oxygen levels, formerly protective scales were replaced by semi-protective corrosion products identified as pyrrhotite, marcasite, pyrite and magnetite. Corrosometer probes were used to determine corrosion rates, but hydrogen probes and chemical analysis were also employed to diagnose corrosion mechanisms. Oxygen appeared to act as a cathodic depolarizer in addition to its oxidizing action on hydrogen sulphide to S, H 2O, SO 4 2− and polysulphides.
Full Text
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call