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- W752681384 abstract "The effect of HCO3− concentration on CO2 corrosion was investigated by polarization measurement of potentiodynamic scans and weight-loss method. Under the conditions of high pressure and high temperature, the corrosion rate of steel X65 decreased with the increase of HCO3− concentration, while pH of solution increased. SEM, EDS, and XRD results of the corrosion scales indicated that the typical FeCO3 crystallite was found at low HCO3− concentration but Ca(Fe, Mg)(CO3)2 was found at high HCO3− concentration, Ca2+ and Mg2+ are precipitated preferential to Fe2+ at high pH value. Potentiodynamic polarization curves showed that the cathodic current density decreases with the increase of HCO3− concentration at low HCO3− concentration. When the HCO3− concentration reaches 0.126 mol/L, increasing HCO3− concentration promotes cathodic reactions. Anodic behavior is an active process at low HCO3− concentration and the anodic current density decreases with the increase of HCO3− concentration. An evident active-passive behavior is exhibited in anodic process at 0.126 mol/L HCO3−." @default.
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- W752681384 date "2006-02-01" @default.
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- W752681384 title "Effect of HCO3− concentration on CO2 corrosion in oil and gas fields" @default.
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- W752681384 doi "https://doi.org/10.1016/s1005-8850(06)60012-1" @default.
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