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10383 Mechanical Strength and Removal of a Protective Iron Carbonate Layer Formed on Mild Steel in Co2 Corrosion

Picture for 10383 Mechanical Strength and Removal of a Protective Iron Carbonate Layer Formed on Mild Steel
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Product Number: 51300-10383-SG
ISBN: 10383 2010 CP
Author: Yang Yang, Bruce Brown, Srdjan Nesic, Maria Elena Gennaro and Bernardo Molinas
Publication Date: 2010
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$20.00
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It has been debated in the past whether, in turbulent flow, the hydrodynamic wall-shear stress can mechanically remove or damage a protective iron carbonate layer formed on mild steel in a CO2 corrosion environment. In this study, the mechanical strength of the iron carbonate layer was measured by a tensile machine. It was shown that the adhesion strength between the iron carbonate layer and the steel substrate is in excess of 10 MPa, which is many orders of magnitude larger than the typical wallshear stress found in turbulent flow. Experiments conducted in a small scale single-phase flow loop confirmed that the iron carbonate layer could not be removed mechanically.

KEY WORDS: adhesion strength, iron carbonate (FeCO3) layer, mechanical layer removal, CO2 corrosion, thin channel, hydrodynamic force, wall-shear stress
It has been debated in the past whether, in turbulent flow, the hydrodynamic wall-shear stress can mechanically remove or damage a protective iron carbonate layer formed on mild steel in a CO2 corrosion environment. In this study, the mechanical strength of the iron carbonate layer was measured by a tensile machine. It was shown that the adhesion strength between the iron carbonate layer and the steel substrate is in excess of 10 MPa, which is many orders of magnitude larger than the typical wallshear stress found in turbulent flow. Experiments conducted in a small scale single-phase flow loop confirmed that the iron carbonate layer could not be removed mechanically.

KEY WORDS: adhesion strength, iron carbonate (FeCO3) layer, mechanical layer removal, CO2 corrosion, thin channel, hydrodynamic force, wall-shear stress
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