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<p>An experimental installation for corrosion tests of steels in mineralized environments at different ratios of partial pressures of hydrogen sulfide and air was developed. Corrosion and hydrogenation of 17Mn1Si steel were studied in a&#xa0;chloride-acetate solution bubbled with hydrogen sulfide, air, and their mixtures. The addition of oxygen to a&#xa0;hydrogen sulfide environment slows down corrosion in short-term electrochemical tests. The concentration of hydrogen sulfide in the solution decreases as a&#xa0;result of interaction with oxygen, and cathodic reactions slow down. The corrosion rate of steel is accelerated in 1.5–2&#xa0;times during long-term tests in a&#xa0;solution with a&#xa0;ratio of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11003_2025_918_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="70" /> </InlineMediaObject> <EquationSource Format="TEX">\(P_{{\mathrm{H}_{2}}\mathrm{S}}\colon P_{\mathrm{air}}\)</EquationSource> </InlineEquation> 1:10. Oxygen complicates the formation of a&#xa0;sulfide-containing layer on the steel surface due to the oxidation of sulfides with the formation of hydrophobic inclusions of sulfur and iron hydroxide. Sulfide films lose their barrier properties: their porosity increases, thickness and adhesion to the metal decrease. Due to selective etching of ferrite from the steel surface as a&#xa0;result of corrosion, the real contact area of the metal with the environment increases, and corrosion accelerates over time.</p>

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The methods of investigation of hydrogen influence on corrosion and hydrogenation of pipe steel in hydrogen sulfide environments

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • M. S. Khoma,
  • M. R. Chuchman,
  • Ch. B. Vasyliv,
  • N. B. Ratska,
  • Yu. I. Koval’chyk

摘要

An experimental installation for corrosion tests of steels in mineralized environments at different ratios of partial pressures of hydrogen sulfide and air was developed. Corrosion and hydrogenation of 17Mn1Si steel were studied in a chloride-acetate solution bubbled with hydrogen sulfide, air, and their mixtures. The addition of oxygen to a hydrogen sulfide environment slows down corrosion in short-term electrochemical tests. The concentration of hydrogen sulfide in the solution decreases as a result of interaction with oxygen, and cathodic reactions slow down. The corrosion rate of steel is accelerated in 1.5–2 times during long-term tests in a solution with a ratio of \(P_{{\mathrm{H}_{2}}\mathrm{S}}\colon P_{\mathrm{air}}\) 1:10. Oxygen complicates the formation of a sulfide-containing layer on the steel surface due to the oxidation of sulfides with the formation of hydrophobic inclusions of sulfur and iron hydroxide. Sulfide films lose their barrier properties: their porosity increases, thickness and adhesion to the metal decrease. Due to selective etching of ferrite from the steel surface as a result of corrosion, the real contact area of the metal with the environment increases, and corrosion accelerates over time.