Evaluation of microstructural and environmental effects on the hydrogen uptake and desorption in high-strength carbon steels: A thermal desorption spectroscopy study

<p dir="ltr">The hydrogen uptake in three high-strength carbon steels is studied after exposure to three different environments: an aqueous solution with CO₂ bubbling, CO₂/H₂S bubbling, and cathodic charging without external gassing. The hydrogen uptake is substantially higher in CO₂/H₂S environment compared to CO₂environment for all materials. The lamellar cementite morphology absorbs higher hydrogen than the material with spheroidite microstructure with similar carbon content. The corrosion layer formed on the steels in CO₂ environment strongly affects the hydrogen effusion and the thermal desorption spectroscopy spectrum in all materials, while the corrosion layer formed in CO₂/H₂S environment does not show this effect.</p><h2>Other Information</h2><p dir="ltr">Published in: Corrosion Science<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.corsci.2023.111210" target="_blank">https://dx.doi.org/10.1016/j.corsci.2023.111210</a></p>