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96072 PRELIMINARY INVESTIGATION OF HYDROGEN UPTAKE AND CRACKING IN 22 Cr DUPLEX STAINLESS STEEL UNDER GALVANIC COUPLING CONDITIONS

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Product Number: 51300-96072-SG
ISBN: 96072 1996 CP
Author: A. J. Griffiths, A. Tumbull
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Tests have been conducted to evaluate the performance of 22 Cr duplex stainless steel coupled to carbon-steel in acid brine environments at 80°C with and without H2S. Measurement of coupled potentials and currents were made in parallel with a detailed evaluation of the effects of H2S, pH and coupling current on hydrogen uptake. Hydrogen contents generated under coupling conditions are large, of the order of 100 ppm (wt.) (total hydrogen). At low charging currents, hydrogen uptake was independent of pH and H2S and proportional to the square root of the charging current density... Keywords: duplex stainless steel, carbon steel, galvanic coupling, hydrogen, permeation, slow strain rate, pH, H2S
Tests have been conducted to evaluate the performance of 22 Cr duplex stainless steel coupled to carbon-steel in acid brine environments at 80°C with and without H2S. Measurement of coupled potentials and currents were made in parallel with a detailed evaluation of the effects of H2S, pH and coupling current on hydrogen uptake. Hydrogen contents generated under coupling conditions are large, of the order of 100 ppm (wt.) (total hydrogen). At low charging currents, hydrogen uptake was independent of pH and H2S and proportional to the square root of the charging current density... Keywords: duplex stainless steel, carbon steel, galvanic coupling, hydrogen, permeation, slow strain rate, pH, H2S
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