About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Tetramethylammonium Iodide as a Corrosion Inhibitor for UNS S31803 Duplex Stainless Steel in Sulfuric Acid Environment |
| Author(s) |
Sthefanie Lopes, Lucas Souza, Anderson Gadioli, Maria Vasconcellos, César Neto, Afonso Rangel Azevedo, Elaine Cristina Pereira |
| On-Site Speaker (Planned) |
Afonso Rangel Azevedo |
| Abstract Scope |
The inhibition performance of the ionic liquid tetramethylammonium iodide (TMAI) on the corrosion of UNS S31803 duplex stainless steel in 1 M H2SO4 solution was evaluated by electrochemical tests, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDS). Results showed that TMAI significantly reduced the corrosion current density and corrosion rate, with inhibition efficiency increasing with the inhibitor concentration. Furthermore, TMAI behaved as a predominantly anodic inhibitor whose adsorption obeys the Langmuir adsorption isotherm. SEM images revealed a smoother, more homogeneous surface in the presence of TMAI, while EDS confirmed the presence of elements associated with the inhibitor, indicating its effective adsorption on the metal surface. These findings demonstrate the effectiveness of TMAI as a corrosion inhibitor and support the potential of ionic liquids as alternatives for protecting metallic materials in aggressive environments, particularly in the oil and gas industry. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Other, |