| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Prediction of Hydrogen Uptake Kinetics in Cathodically Polarized Metals |
| Author(s) |
Livia Cupertino Malheiros, Emilio Martinez-Paneda |
| On-Site Speaker (Planned) |
Livia Cupertino Malheiros |
| Abstract Scope |
This work employs a broad experimental approach to investigate the kinetics of hydrogen evolution reactions (HER) and hydrogen absorption, providing a first database of reaction rate input parameters for a developed model capable of resolving hydrogen uptake into cathodically polarized metals. Metal surface activities are investigated using potentiodynamic cathodic polarization and electrochemical impedance spectroscopy (EIS) in relatively mild electrolytes from pH 1 to 13. Fits of the polarization and EIS data provide quantitative information on the electrocatalytic activity of the metal surface and dominant HER mechanism (Volmer-Heyrovsky or Volmer-Tafel) used to obtain HER kinetic parameters, which are then linked to hydrogen absorption kinetics via analysis of electrochemical permeation transients. The full set of experimental reaction rate parameter values is incorporated into the model framework, demonstrating its potential to quantify hydrogen ingress as a function of environment, material, and defect geometry characteristics. |
| Proceedings Inclusion? |
Planned: |