Impact of oxygen contamination on the electrochemical impedance spectroscopy of iron corrosion in H2S solutions

Failure analysis of geothermal perforated casing tubing in H2S and O2 containing environment

“…The corrosion product from sour corrosion was FeS [12]. However, H 2 S corrosion could become severe under the influence of oxygen or SO 2 polluted environment [6,13]. Oxygen reduces the possibilities of hydrogen diffusion into the iron lattice, hence prevents crack formation [13].…”

“…However, H 2 S corrosion could become severe under the influence of oxygen or SO 2 polluted environment [6,13]. Oxygen reduces the possibilities of hydrogen diffusion into the iron lattice, hence prevents crack formation [13]. Song SOat all temperatures, whereas liquid still exists [14].…”

Modeling of the cathodic and anodic polarization curves of metals and alloys at an electronic level

“…1 The most commonly used approaches to characterize the corrosion processes include weight loss assessment, electrochemical potentiodynamic polarization, and electrochemical impedance spectroscopy. [2][3][4] These techniques provide important information for assessing the corrosion rate and susceptibility of specic materials to corrosion. [5][6][7][8] However, elucidating the corrosion mechanisms solely from experiments remains a dramatic task, since it is difficult to obtain atomistic and/or electronic information about the complex corrosion environment.…”