| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7896008 | Corrosion Science | 2014 | 13 Pages |
Abstract
The effect of environmental parameters on the electrochemical corrosion of X100 steel in NS4 simulated soil solution is investigated. The parameters examined were pH (4.7-9), purging gas (5% carbon dioxide (CO2)/95% nitrogen (N2), 100% carbon dioxide, and 100% nitrogen), solution temperature (25, 40, and 55 °C), bicarbonate (HCO3-) concentration, chloride (Clâ), and sulfate (SO42-). Overall, corrosion rates of the specimens decreased with pH. Sufficient bicarbonate was critical for the passivation of the steel. Higher chloride/sulfate content prevented stable passivation. Impedance results reveal the involvement of adsorption and parallel adsorption-diffusion in near-neutral and mildly alkaline conditions, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ibrahim M. Gadala, Akram Alfantazi,