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08637 Corrosion of Mild Steel in the Presence of Elemental Sulfur

Picture for 08637 Corrosion of Mild Steel in the Presence of Elemental Sulfur
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Product Number: 51300-08637-SG
ISBN: 08637 2008 CP
Author: Haitao Fang, David Young, and Srdjan Nesic
Publication Date: 2008
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Elemental sulfur is often produced by sour gas wells, primarily due to the oxidation of hydrogen sulfide. This may occur as a result of oxygen contamination. Alternatively, with pressure and temperature changes in the line, sulfur may precipitate and deposit on the pipeline walls. In the presence of water, contact of solid sulfur with mild steel can result in the onset of catastrophic corrosion processes. The objective of this project is to study the effect of elemental sulfur on the corrosion of mild steel. In preliminary experiments, elemental sulfur hydrolysis and sulfur-mild steel corrosion were investigated. Sulfur was found to react with water at temperatures of greater than 80oC, resulting in significant acidification of the corrosion solution. It was also found that elemental sulfur can cause localized corrosion of mild steel when they are in direct contact. Iron sulfide films/scales readily formed on the surface of the steel; these were analyzed by infinite focus microscopy (IFM), scanning electron microscopy (SEM) and X-ray diffraction (XRD).
Elemental sulfur is often produced by sour gas wells, primarily due to the oxidation of hydrogen sulfide. This may occur as a result of oxygen contamination. Alternatively, with pressure and temperature changes in the line, sulfur may precipitate and deposit on the pipeline walls. In the presence of water, contact of solid sulfur with mild steel can result in the onset of catastrophic corrosion processes. The objective of this project is to study the effect of elemental sulfur on the corrosion of mild steel. In preliminary experiments, elemental sulfur hydrolysis and sulfur-mild steel corrosion were investigated. Sulfur was found to react with water at temperatures of greater than 80oC, resulting in significant acidification of the corrosion solution. It was also found that elemental sulfur can cause localized corrosion of mild steel when they are in direct contact. Iron sulfide films/scales readily formed on the surface of the steel; these were analyzed by infinite focus microscopy (IFM), scanning electron microscopy (SEM) and X-ray diffraction (XRD).
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