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The Effects of H2S and Cl- on Hydrogen Permeation in High Strength Low Alloy Carbon Steels

Picture for The Effects of H2S and Cl- on Hydrogen Permeation in High Strength Low Alloy Carbon Steels
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Product Number: 51321-16329-SG
Author: Lianlian Liu/Raymundo Case
Publication Date: 2021
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The objective of this research is to obtain a quantitative description of the effect of adsorbed H2S and chloride on the hydrogen penetration in high strength low alloy (HSLA) carbon steel, by evaluating the response of hydrogen permeation current and the formation of characteristic inductive responseusing hydrogen permeation and electrochemical Impedance spectroscopy methods on HSLA carbon steel C110. The hydrogen permeation flux measured in Devanathan-Stachurski cell suggests that enhance effectof H2S on absorption of hydrogenfollowing an adsorption isotherm behavior as a function of the H2S activity in solution. The inductive response of electrochemical impedance spectroscopy (EIS) showed consistency with effect of adsorption of H2S. The EIS results also indicate that the coverage of H2S was suppressed by chloride. A good correlation about the effect of adsorbed chloride was found between inductive response and hydrogen permeation flux.

Key words: hydrogen permeation, H2S, chloride, pH value, adsorption, electrochemistry, carbon steel

The objective of this research is to obtain a quantitative description of the effect of adsorbed H2S and chloride on the hydrogen penetration in high strength low alloy (HSLA) carbon steel, by evaluating the response of hydrogen permeation current and the formation of characteristic inductive responseusing hydrogen permeation and electrochemical Impedance spectroscopy methods on HSLA carbon steel C110. The hydrogen permeation flux measured in Devanathan-Stachurski cell suggests that enhance effectof H2S on absorption of hydrogenfollowing an adsorption isotherm behavior as a function of the H2S activity in solution. The inductive response of electrochemical impedance spectroscopy (EIS) showed consistency with effect of adsorption of H2S. The EIS results also indicate that the coverage of H2S was suppressed by chloride. A good correlation about the effect of adsorbed chloride was found between inductive response and hydrogen permeation flux.

Key words: hydrogen permeation, H2S, chloride, pH value, adsorption, electrochemistry, carbon steel

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