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10143 Evaluating Corrosion and Inhibition Under Sludge Deposits in Large Diameter Crude Oil Pipelines

Picture for 10143 Evaluating Corrosion and Inhibition Under Sludge Deposits in Large Diameter Crude Oil Pipeline
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Product Number: 51300-10143-SG
ISBN: 10143 2010 CP
Author: Jenny Been, Trevor D. Place and Michael Holm
Publication Date: 2010
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Pipelines carrying heavy crude oil from oil sand developments may be subject to corrosion caused by deposition of oil sand sediments, a sludge containing oil, water, and bacteria in a particulate matrix. A test methodology to determine the corrosive nature of the sludge and evaluate inhibitor performance is explored, consisting of exposure testing and electrochemical measurements of corrosion potential and linear polarization resistance (LPR) measurements. The corrosive nature of the sludge was demonstrated and differences in the corrosivity of various sludges were observed. Inhibitor performance was evaluated, where inhibitor was mixed with the sludge, or added to the bulk environment. The electrochemical measurements provided mechanistic data and information on the characteristics of the sludge that may be important in selecting an effective inhibitor.

Keywords: inhibition, underdeposit corrosion, sludge, oil sand, bacteria
Pipelines carrying heavy crude oil from oil sand developments may be subject to corrosion caused by deposition of oil sand sediments, a sludge containing oil, water, and bacteria in a particulate matrix. A test methodology to determine the corrosive nature of the sludge and evaluate inhibitor performance is explored, consisting of exposure testing and electrochemical measurements of corrosion potential and linear polarization resistance (LPR) measurements. The corrosive nature of the sludge was demonstrated and differences in the corrosivity of various sludges were observed. Inhibitor performance was evaluated, where inhibitor was mixed with the sludge, or added to the bulk environment. The electrochemical measurements provided mechanistic data and information on the characteristics of the sludge that may be important in selecting an effective inhibitor.

Keywords: inhibition, underdeposit corrosion, sludge, oil sand, bacteria
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