About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Spectroelectrochemical Evaluation of Carbon Steel in Slightly Sour Environments Under the Presence of H2S/CO2 and Triazine-Based H2S Scavenger |
Author(s) |
Vinicio Ynciarte, Leonardo Caseres, James Dante, Brendy Rincon Troconis |
On-Site Speaker (Planned) |
Brendy Rincon Troconis |
Abstract Scope |
Injecting H2S scavenger is a common practice to reduce H2S in the oil and gas industry. Nevertheless, failures in the form of SCC of steel pipes in the presence of MEA-triazine have been reported. The effects of this chemistry on the corrosion and cracking mechanism of carbon steel is unknown. Therefore, in this work, a spectroelectrochemical evaluation based on in-situ Raman spectroscopy, in-situ surface enhanced Raman spectroscopy, electrochemical techniques and SSRT was utilized. This methodology was selected to identify: the chemical species present in the test solution prior to and following the scavenging process, measure specific adsorption of amine by-products on the steel, changes in the surface film composition, assess the electrochemical behavior, and evaluate SCC susceptibility. Based on literature related to corrosion in bicarbonate containing environments and the results of this work, it is suggested that SCC is governed by a possible transition from passive to active kinetics. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Characterization, Environmental Effects |