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<p>This study investigates the effects of quenching and tempering, as well as the application of polymeric and copper coatings, on hydrogen permeability and corrosion resistance in an experimental Cr–Mo–V steel developed from AISI 4140 steel. The research demonstrates that the steel’s microstructure plays a crucial role in its behavior, significantly reducing hydrogen diffusion by two orders of magnitude and increasing hydrogen trapping to more than 80%. However, the quenched steel exhibited higher susceptibility to corrosion and lower polarization resistance, indicating a trade-off between heat treatment and chemical stability. Furthermore, the application of surface coatings was found to effectively decrease hydrogen diffusion, enhancing the material’s overall resistance to hydrogen permeation. These findings suggest that a careful combination of heat treatment processes and protective coatings can lead to the development of a reliable and durable solution suitable for hydrogen storage containers.</p> Graphical abstract <p></p>

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Effect of quenching, tempering, and polymeric/copper coatings on the hydrogen permeability of a medium-carbon, low-alloy Cr–Mo–V steel

  • 期刊论文

  • 发表日期：

    2026年2月10日

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  • Bryan Daniel Gutiérrez-García,
  • Miguel Iván Dávila-Pérez,
  • Octavio Vázquez-Gómez,
  • Julio César Villalobos-Brito,
  • Héctor Javier Vergara-Hernández

摘要

This study investigates the effects of quenching and tempering, as well as the application of polymeric and copper coatings, on hydrogen permeability and corrosion resistance in an experimental Cr–Mo–V steel developed from AISI 4140 steel. The research demonstrates that the steel’s microstructure plays a crucial role in its behavior, significantly reducing hydrogen diffusion by two orders of magnitude and increasing hydrogen trapping to more than 80%. However, the quenched steel exhibited higher susceptibility to corrosion and lower polarization resistance, indicating a trade-off between heat treatment and chemical stability. Furthermore, the application of surface coatings was found to effectively decrease hydrogen diffusion, enhancing the material’s overall resistance to hydrogen permeation. These findings suggest that a careful combination of heat treatment processes and protective coatings can lead to the development of a reliable and durable solution suitable for hydrogen storage containers.

Graphical abstract