Experimental and Numerical Simulation of Corrosion Behavior of A333 Carbon Steel Weldment in CO2-Saturated Environment
Received: 31 July 2025 | Revised: 5 September 2025 and 22 September 2025 | Accepted: 24 September 2025 | Online: 10 October 2025
Corresponding author: K. E. Kee
Abstract
The galvanic corrosion behavior of A333 carbon steel weldments in carbon dioxide gas-bubbled 3 wt% NaCl solution was studied in the current research by experimental electrochemical measurements and computational modeling. Zero Resistance Ammeter (ZRA) measurements were employed to quantify the galvanic corrosion rates of Parent Metal (PM), Heat-Affected Zone (HAZ), and Weld Metal (WM) at temperatures of 25 °C and 60 °C for homogeneous and heterogeneous welds. These experimental results were compared with computational simulations using COMSOL Multiphysics version 5.6, where the Nernst-Planck and Tafel equations were applied to simulate them. The findings revealed that galvanic interactions between the weldment zones increased with temperature, with the HAZ exhibiting the highest corrosion rate and behaving anodically due to electrochemical potential variation and microstructural differences at both temperatures. The comparison between experimental and simulated corrosion rates demonstrated good agreement, confirming the predictive capability of the model with the heterogeneous weld being more susceptible to galvanic corrosion than the homogeneous weld. This study offers valuable insights into the impact of temperature on galvanic corrosion, and the significance of using simulation tools in predicting galvanic corrosion between the weldment zones.
Keywords:
weld corrosion, galvanic corrosion, numerical simulation, COMSOL MultiphysicsDownloads
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Copyright (c) 2025 Taiwo Onaopemipo Alao, K. E. Kee, Mazli Mustapha, Kehinde Temitope Alao
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