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51314-4014-Corrosion behavior of Cr bearing low alloy steel with different Cr content in CO2 Top-of-Line Corrosion environment

Picture for Corrosion behavior of Cr bearing low alloy steel with different Cr content in CO2 Top-of-Line Corros
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Product Number: 51314-4014-SG
ISBN: 4014 2014 CP
Author: Yunan Zhang
Publication Date: 2014
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Abstract?CO2 Top-of-Line Corrosion(TLC) is one of the most serious problems in wet gas subsea pipelines. Due to better localized corrosion resistance than carbon steel the new generation of low Cr (2%~4%) alloy steels show superior resistance to CO2 corrosion. The experiments were carried out in a high temperature high pressure condensation autoclave simulating CO2 TLC environment. The composition and morphology of the corrosion scale are characterized by X-ray diffraction energy dispersive X-ray spectroscopy and scanning electron microscopy analyses. The results indicated that the 2% Cr and 3% Cr alloy steels exhibited slight localized corrosion and the 4% Cr alloy steel exhibited uniform corrosion. With higher Cr content the localized corrosion resistance of 4% Cr alloy steel was superior to 2% and 3% Cr alloy steel.Keywords: Top-of-Line Corrosion CO2 corrosion Cr bearing low alloy steelCr content corrosion scale 
Abstract?CO2 Top-of-Line Corrosion(TLC) is one of the most serious problems in wet gas subsea pipelines. Due to better localized corrosion resistance than carbon steel the new generation of low Cr (2%~4%) alloy steels show superior resistance to CO2 corrosion. The experiments were carried out in a high temperature high pressure condensation autoclave simulating CO2 TLC environment. The composition and morphology of the corrosion scale are characterized by X-ray diffraction energy dispersive X-ray spectroscopy and scanning electron microscopy analyses. The results indicated that the 2% Cr and 3% Cr alloy steels exhibited slight localized corrosion and the 4% Cr alloy steel exhibited uniform corrosion. With higher Cr content the localized corrosion resistance of 4% Cr alloy steel was superior to 2% and 3% Cr alloy steel.Keywords: Top-of-Line Corrosion CO2 corrosion Cr bearing low alloy steelCr content corrosion scale 
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