Title: Corrosion behavior of steel X70 in acid solution of carbon dioxide at high temperature and under high pressure
Abstract: The corrosion behavior of steel X70 under the condition of three sets of high temperatures and in the environment of CO2 under 2 MPa partial pressure were investigated in autoclave with weight loss method,SEM,XRD,and electron-probe micro-analysis.The result showed that,within the temperature ranges used,the steel X70 was corroded seriously by the CO2 environment medium;with increasing temperature,the corrosion rate showed the tendency of increasing first and then decreasing,and the maximum rate appeared at the temperature of 120 ℃;the main corrosion scale was of Fe3C and FeCO3; the CO2 corrosion made the surface of steel X70 of the corrosion feature such as point-corrosion,strip-corrosion,and the map distribution of element carbon,(analyzed by the EPMA),also exhibited strip feature.The two sides of sample,parallel to the rolling direction exhibited remarkable point-corrosion feature.Other two parallel sides of sample,perpendicular to the rolling direction exhibited little point-corrosion feature.The corrosion of CO2 was the result of interaction of multiple factors.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 1
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