Research on Evaluation of Corrosion Inhibitors for Oxygen Reducing Air Drive Gas Wells
DOI:
https://doi.org/10.54097/ije.v3i2.012Keywords:
Evaluation of Corrosion Inhibitors, Oxygen Corrosion, Carbon Dioxide Corrosion, Corrosion Inhibitor MechanismAbstract
Severe CO2 corrosion and O2 corrosion occurred during the extraction of a certain gas well. Six commonly used corrosion inhibitors for a certain gas well were evaluated through indoor weight loss tests. It was found that the corrosion inhibition effect of No. 1 corrosion inhibitor in CO2 and O2 environments was the best compared to the other five corrosion inhibitors. The corrosion inhibition efficiency can be divided into 96% and 93%, and the dosage is small, which meets the requirements of the target gas well corrosion inhibitor. The corrosion inhibition mechanisms of the six corrosion inhibitors all conform to the adsorption mechanism, and their action mechanisms are all "negative catalytic" effects. Through adsorption, the activation energy of the cathodic and anodic reactions is increased, which hinders the occurrence of corrosion reactions. Among them, corrosion inhibitors 1, 2, 3, and 5 are mixed corrosion inhibitors that mainly inhibit anodic reactions, while corrosion inhibitors 4 and 6 are mixed corrosion inhibitors that mainly inhibit cathodic reactions.
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References
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