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02486 New Understanding on Corrosion of Alloys in High-Temperature Sulfidizing Gases

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Many alloys exposed in high-temperature process equipment corrode by sulfidation corrosion in the presence of H2-H2S gases. This paper discusses the latest results of an extensive testing program for a diverse group of about 15 commercial alloys exposed to temperatures of 300 - 900°C with exposure times up to 6,000 hours.

Product Number: 51300-02486-SG
ISBN: 02486 2002 CP
Author: R. C. John and A. L. Young
Publication Date: 2002
Industry: Energy Generation
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Many alloys exposed in high-temperature process equipment corrode by sulfidation corrosion in the presence of H2-H2S gases. This paper discusses the latest results of an extensive testing program for a diverse group of about 15 commercial alloys exposed to temperatures of 300 - 900°C with exposure times up to 6,000 hours. The new data combined with prior data now allow engineering sulfidation corrosion assessments and predictions to be made for up to 26 alloys in wide ranges of conditions. The gaseous exposures included 0.001 - 0.2 atma H2S and 0.05 - 1.0 atma H2. The effects of H2S partial pressure, H2 partial pressure, temperature, exposure time and alloy type have all been analyzed and compiled to allow prediction of sulfidation corrosion for wide ranges of conditions to allow engineering predictions of corrosion-limited lifetimes. Applications for this technology can be found in oil refining, petrochemicals production, pulp/paper production, and power generation.

Keywords: ASSET, sulfidation, high-temperature corrosion predictions, corrosion data compilation, engineering lifetime predictions, weight change, parabolic rate constant

Many alloys exposed in high-temperature process equipment corrode by sulfidation corrosion in the presence of H2-H2S gases. This paper discusses the latest results of an extensive testing program for a diverse group of about 15 commercial alloys exposed to temperatures of 300 - 900°C with exposure times up to 6,000 hours. The new data combined with prior data now allow engineering sulfidation corrosion assessments and predictions to be made for up to 26 alloys in wide ranges of conditions. The gaseous exposures included 0.001 - 0.2 atma H2S and 0.05 - 1.0 atma H2. The effects of H2S partial pressure, H2 partial pressure, temperature, exposure time and alloy type have all been analyzed and compiled to allow prediction of sulfidation corrosion for wide ranges of conditions to allow engineering predictions of corrosion-limited lifetimes. Applications for this technology can be found in oil refining, petrochemicals production, pulp/paper production, and power generation.

Keywords: ASSET, sulfidation, high-temperature corrosion predictions, corrosion data compilation, engineering lifetime predictions, weight change, parabolic rate constant

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Picture for 02382 Update on an Information System for High...
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02382 Update on an Information System for High Temperature Corrosion

Product Number: 51300-02382-SG
ISBN: 02382 2002 CP
Author: R. C. John, A. D. Pelton, A. L. Young, W. T. Thompson, I. G. Wright and T. M. Besmann, and M. A. Ha
Publication Date: 2002
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This presentation summarizes the development and expansion of a comprehensive information system for corrosion of metals and alloys in high temperature gases.  New insights in analysis of thermochemical data for the Fe-Ni-Cr-Co-C-O-S-N system are being compiled.  Corrosion mechanisms emphasized are oxidation, sulfidation, sulfidation/oxidation, and carburization.
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