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Effect of Carbon Dioxide and Hydrogen Sulfide on the Localized Corrosion Susceptibility of Corrosion

Picture for Effect of Carbon Dioxide and Hydrogen Sulfide on the Localized Corrosion Susceptibility of Corrosion
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The purpose of this review is to discuss environmental effects, especially hydrogen sulfide and carbon dioxide on pitting susceptibility of low alloy steels and corrosion resistant alloys.

Product Number: 51317--8933-SG
ISBN: 8933 2017 CP
Author: Teresa Perez
Publication Date: 2017
Industries: Oil and Gas Production , Corrosion Monitoring and Control
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Carbon steels, low alloy steels (LAS) and corrosion resistant alloys (CRA) used in the upstream oil and gas industry may be susceptible to localized corrosion. Several variables control the oc-currence of localized corrosion, including alloy composition, heat treatment, and environmental effects such as temperature, and concentration of chloride, oxygen and other species. Regard-ing carbon and LAS, it is recognized that even small concentrations of hydrogen sulfide (H2S) can have an important effect on general corrosion rate when compared to environments where carbon dioxide (CO2) controlled the corrosion phenomenon. However, there are still several unknowns about the effect of H2S on pitting, which is the most common mode of sour service failure. Regarding CRA, there is contradictory information on the effect of H2S and CO2 in the environment and how it affects pitting corrosion initiation and propagation. The purpose of this review is to discuss the environmental effects, especially H2S and CO2 on pitting susceptibility of LAS and CRAs.
Keywords: low alloy steels, corrosion resistant alloys, localized corrosion, hydrogen sulfide, car-bon dioxide, passivation, PRE, chloride, temperature

Carbon steels, low alloy steels (LAS) and corrosion resistant alloys (CRA) used in the upstream oil and gas industry may be susceptible to localized corrosion. Several variables control the oc-currence of localized corrosion, including alloy composition, heat treatment, and environmental effects such as temperature, and concentration of chloride, oxygen and other species. Regard-ing carbon and LAS, it is recognized that even small concentrations of hydrogen sulfide (H2S) can have an important effect on general corrosion rate when compared to environments where carbon dioxide (CO2) controlled the corrosion phenomenon. However, there are still several unknowns about the effect of H2S on pitting, which is the most common mode of sour service failure. Regarding CRA, there is contradictory information on the effect of H2S and CO2 in the environment and how it affects pitting corrosion initiation and propagation. The purpose of this review is to discuss the environmental effects, especially H2S and CO2 on pitting susceptibility of LAS and CRAs.
Keywords: low alloy steels, corrosion resistant alloys, localized corrosion, hydrogen sulfide, car-bon dioxide, passivation, PRE, chloride, temperature

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Design Challenges for Material Selection in Sour and High Salinity Gas and Oil Production Facilites

Product Number: 51317--9244-SG
ISBN: 9244 2017 CP
Author: Pedro Rincon
Publication Date: 2017
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This paper addresses the challenges to provide example of engineering solutions through the use of corrosion resistant alloys and non metallic materials to maintain the integrity of flowlines and process equipment in severe sour service.
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Effect of Acetic Acid on Sour Corrosion of Carbon Steel

Product Number: 51317--9318-SG
ISBN: 9318 2017 CP
Author: Jon Kvarekval
Publication Date: 2017
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An experimental study of corrosion of carbon steel in the presence of H2S, CO2 and acetic acid has been carried out. H2S and CO2 partial pressures up to 10 bar each were applied, with temperatures of 25 and 90oC.
Picture for Corrosion and Corrosion Products in a Sour Environment from 80°C to 200°C
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Corrosion and Corrosion Products in a Sour Environment from 80°C to 200°C

Product Number: 51317--9084-SG
ISBN: 9084 2017 CP
Author: Shujun Gao
Publication Date: 2017
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Corrosion rate of mild steel and character of corrosion products in sour environments at temperatures from 20 to 200°C. H2S-H2O water chemistry model was developed. Then, H2S corrosion tests were done at 80, 120, 160 & 200°C - exposure time of 4 days.
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