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Despite of the vast research conducted on steel corrosion cracking, there are very limited technically rigorous explanations on hydrogen damage crack initiation and propagation in mild steel structural members. The intention of this paper is to study the hydrogen embrittlement effect on mild steel properties by a series of lab experiments and also to investigate the combined effect of stress and corrosion on mechanical properties of mild steel. Besides, the paper aims to develop and calibrate the matlab code on Extend Finite Element method for crack propagation. A test plan is designed to expose mild steel samples to corrosion and stress combination environment, with mass loss and hydrogen concentration monitored during corrosion. The paper provides a more accurate understanding of corrosion cracking propagation mechanism for mild steel bridges. The developed results can be used in bridge maintenance and assessment models.

A Comprehensive Study on Hydrogen Embrittlement and Corrosion Propagation in Mild Steel Bridges