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51315-5855-The Likelihood of Localized Corrosion in an H?S/CO? Environment

Picture for The Likelihood of Localized Corrosion in an H?S/CO? Environment
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Product Number: 51315-5855-SG
ISBN: 5855 2015 CP
Author: Bruce Brown
Publication Date: 2015
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$20.00
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Understanding the mechanisms that lead to localized corrosion in oil and gas pipeline is of great interest to corrosion engineers worldwide. In a research program which examined corrosion under slightly sour conditions due to an H2S/CO2 environment experimental studies were carried out to identify the environmental parameters with the most influence on the likelihood of localized corrosion. Observations of localized corrosion that occurred in slightly sour conditions in a large scale flow loop under single phase and multiphase flow were used to develop a better understanding of how bulk solution conditions can affect the growth of the corrosion product layers over time and their relationship to localized corrosion. It was shown that the solution bulk pH concentrations of carbonates concentration of sulfides and the ionic strength of the solution are the major factors related to localized corrosion in a slightly sour environment. The experimental data was then analyzed and used to develop a correlation to relate these parameters to the likelihood of localized corrosion.
Understanding the mechanisms that lead to localized corrosion in oil and gas pipeline is of great interest to corrosion engineers worldwide. In a research program which examined corrosion under slightly sour conditions due to an H2S/CO2 environment experimental studies were carried out to identify the environmental parameters with the most influence on the likelihood of localized corrosion. Observations of localized corrosion that occurred in slightly sour conditions in a large scale flow loop under single phase and multiphase flow were used to develop a better understanding of how bulk solution conditions can affect the growth of the corrosion product layers over time and their relationship to localized corrosion. It was shown that the solution bulk pH concentrations of carbonates concentration of sulfides and the ionic strength of the solution are the major factors related to localized corrosion in a slightly sour environment. The experimental data was then analyzed and used to develop a correlation to relate these parameters to the likelihood of localized corrosion.
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Mild steel specimens (API 5L X65) were pretreated to form a pyrrhotite layer on the surface using high temperature sulfidation in oil, then exposed to a range of aqueous CO2 and H2S corrosion environments, leading to initiation of localized corrosion.

 
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