Abstract
In wet gas pipelines, monoethylene glycol (MEG) is widely used as a hydrate inhibitor, which can absorb free water and make decrease the corrosion rate of carbon steel pipeline. On the other hand, the presence of MEG affects on the solubility and diffusivity of CO2 in water. So, this paper presents a study of MEG inhibition properties in acid gas with CO2 content of 4 mol. %, an influence of MEG content in the brine water, pH and temperature on the corrosion rate of carbon steel by linear polarization resistance (LPR) and mass loss methods. The results show that the more MEG content increases, the more corrosion rate decreases. However, this effect is not significant unless the MEG content in the bulk liquid phase is higher than 70 wt. %.
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