Having a better understanding of the effect of increased temperature on the performance of organic corrosion inhibitors (CIs) is beneficial for their usage in high temperature environments. The present work focuses on studying the effect of temperature on inhibition behaviours of an in-house synthesized CI model compound, tetradecyl phosphate ester (PE-C14), in a simulated refinery environment. Surface saturation concentrations at three temperatures (25°C, 55°C, temperature (25°C), a gelatinous film formed on the rotating cylinder electrode (RCE) surface that significantly affected the limiting current, although the PE-C14 layer was poorly adherent. At elevated temperatures (55 a gelatinous film formed on the rotating cylinder electrode (RCE) surface that significantly affected the limiting current, although the PE-C1C and 80°C), a thick, adherent and readily detectable by EDS and Raman spectroscopy, PE-C14 layer formed on the RCE surface to achieve much lower corrosion rate (inhibition efficiency close to 100%) with relatable surface saturation concentrations.

Subject
Scanning electron microscopy, Energy dispersive X-ray spectroscopy, Steel surfaces, Water, Inhibitor performance, Corrosion rate, Saturation, Raman spectroscopy, Refineries, Phosphates, Film formation, Corrosion inhibitors, Surface layers
Keywords:
corrosion inhibition, phosphate ester, surface saturation concentration, temperature, inhibitor film
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2022
Association for Materials Protection and Performance (AMPP)
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