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Inhibition of X52 Corrosion in CO 2 -Saturated Brine by a Dialkyl-Diamide from Coffee Bagasse Oil
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Inhibition of X52 Corrosion in CO 2 -Saturated Brine by a Dialkyl-Diamide from Coffee Bagasse Oil
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Journal Article
Inhibition of X52 Corrosion in CO 2 -Saturated Brine by a Dialkyl-Diamide from Coffee Bagasse Oil
2023
Overview
This work reports the performance of a green corrosion inhibitor with double hydrocarbon chain. The evaluated inhibitor was a dialkyl-diamide from coffee bagasse oil and its electrochemical behavior was evaluated on an API-X52 steel in CO
-saturated brine at 60 °C. The electrochemical behavior was determined by measurements of open circuit potential, polarization resistance, and electrochemical impedance spectroscopy. In addition, the thermodynamic parameters of the corrosion process were obtained in the temperature range from 40 °C to 80 °C. Electrochemical studies showed that the inhibitor is capable of suppressing metal dissolution by up to 99% at 25 ppm. On the other hand, the thermodynamic parameters indicate that when adding the inhibitor, there is a strong increase in both Ea and ΔH° values, and that as time increases, they decrease until reaching similar values to those observed in the absence of the inhibitor. Furthermore, ΔS° values tend to become more negative with immersion time because of the formation of a stable film on the metal surface.
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