| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-106: Film Characterization and Repassivation Kinetics of Carbon & Austenitic Stainless Steel in Thiosulfate-Containing Environments |
| Author(s) |
Abdullah Alzubail, Preet Singh |
| On-Site Speaker (Planned) |
Abdullah Alzubail |
| Abstract Scope |
Stability of different sulfur species in aqueous environments depends on the pH and electrochemical potential which also affects their role in corrosion of steels. Thiosulfates, which are found in industries such as paper and pulp, oil and gas, and nuclear energy can cause corrosion or stress corrosion cracking under certain environmental conditions. This study focuses on characterizing the corrosion films formed on carbon and austenitic stainless steel and evaluate the steel repassivation kinetics under different thiosulfate-containing environments. Tests were conducted in oxic/anoxic environments, with varying concentrations of thiosulfate, sodium chloride, and pH. First, electrochemical impedance spectroscopy (EIS) was conducted to examine the film structure, thickness and corrosion resistance. Second, chronoamperometry was applied to monitor the transient current response followed by disrupting the passive film to study the steel's repassivation kinetics. Finally, XPS and EDS analysis were performed to support the findings from the EIS and chronoamperometry tests. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, Environmental Effects, Other |