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11327 Effects of Temperature on CO2 Top of Line Corrosion of Pipeline Steel

Picture for 11327 Effects of Temperature on CO2 Top of Line Corrosion of Pipeline Steel
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Product Number: 51300-11327-SG
ISBN: 2011 11327 CP
Author: Yingfeng Chen, Lei Zhang, Huimin Qin, Lining Xu, Minxu Lu
Publication Date: 2011
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The influence of the temperature of wet gas and the state of the thin liquid film on Top Of Line (TOL) CO2 corrosion of X65 pipeline steel was studied in a high pressure, high temperature autoclave designed to simulating water condensation in wet gas pipeline environment. The corrosion rate increased with the wet gas temperature. The temperature of wet gas and the outside environment temperature affected the thickness of the condensate film, the condensation rate, and the film temperature. When the temperature of wet gas or condensed water film is relatively low, the corrosion is mainly controlled by the electrochemical reaction with low corrosion rate. When the temperature is increased, the corrosion rate becomes higher due to the increase of film thickness and condensation rate. However, when the temperature of wet gas is higher, corrosion product scale can precipitate and deposit, protecting the metal surface.

Keywords: Top of Line Corrosion, CO2 corrosion, Condensation rate, Temperature
The influence of the temperature of wet gas and the state of the thin liquid film on Top Of Line (TOL) CO2 corrosion of X65 pipeline steel was studied in a high pressure, high temperature autoclave designed to simulating water condensation in wet gas pipeline environment. The corrosion rate increased with the wet gas temperature. The temperature of wet gas and the outside environment temperature affected the thickness of the condensate film, the condensation rate, and the film temperature. When the temperature of wet gas or condensed water film is relatively low, the corrosion is mainly controlled by the electrochemical reaction with low corrosion rate. When the temperature is increased, the corrosion rate becomes higher due to the increase of film thickness and condensation rate. However, when the temperature of wet gas is higher, corrosion product scale can precipitate and deposit, protecting the metal surface.

Keywords: Top of Line Corrosion, CO2 corrosion, Condensation rate, Temperature
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