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<p>This paper describes the results of determining the effectiveness of protective coatings made of zinc during the hydrogen corrosion tests. The coatings were applied by DC-magnetron sputtering to the samples of austenitic steel and commercially pure iron. Hydrogen corrosion, in addition to oxidation and dissolution of the surface material, involves hydrogen adsorption. This process was simulated by the cathodic polarization method to provide efficient hydrogenation of the material. The samples with and without coatings were subjected to hydrogenation. Next, the samples were studied by thermal desorption spectroscopy. Analysis of the results showed that the used technique allowed the researchers to record a decrease in the degree of hydrogenation during corrosion tests of the samples with zinc coatings. In the zinc coating, diffusion hydrogen accumulates along the grain boundaries. In the substrate, most of the hydrogen is concentrated in irreversible traps-centers of dislocation clusters.</p>

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Application of the High-Temperature Thermal Desorption Method to Study the Barrier Properties of Coatings When Tested for Hydrogen Corrosion

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Alexandr Larionov,
  • Serik Akayev,
  • Igor Khromushin,
  • Sergey Kislitsin

摘要

This paper describes the results of determining the effectiveness of protective coatings made of zinc during the hydrogen corrosion tests. The coatings were applied by DC-magnetron sputtering to the samples of austenitic steel and commercially pure iron. Hydrogen corrosion, in addition to oxidation and dissolution of the surface material, involves hydrogen adsorption. This process was simulated by the cathodic polarization method to provide efficient hydrogenation of the material. The samples with and without coatings were subjected to hydrogenation. Next, the samples were studied by thermal desorption spectroscopy. Analysis of the results showed that the used technique allowed the researchers to record a decrease in the degree of hydrogenation during corrosion tests of the samples with zinc coatings. In the zinc coating, diffusion hydrogen accumulates along the grain boundaries. In the substrate, most of the hydrogen is concentrated in irreversible traps-centers of dislocation clusters.