Effects of alcohol-based inhibitors on corrosion of mild steel in hydrochloric acid |
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Authors: | D Jayaperumal |
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Affiliation: | Corrosion Testing and Evaluation Division, CECRI, Karaikudi 630006, Tamil Nadu, India |
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Abstract: | The inhibition efficiencies of Octyl alcohol (OCAL) and propargyl alcohol (PRAL) on the corrosion of mild steel in 15% commercial hydrochloric acid have been evaluated by mass loss method, electrochemical techniques and surface analysis techniques with 0–1% inhibitor concentration at 30 °C and 105 °C. Both OCAL and PRAL are excellent inhibitors for the above-mentioned system. OCAL gives 87% and 82% inhibition efficiencies at 30 °C and 105 °C, respectively, for 1% inhibitor concentration whereas PRAL gives 100% and 99% efficiencies at 30 °C and 105 °C, respectively, for 0.6% inhibitor concentration. Polarization studies confirm that OCAL and PRAL are mixed type inhibitors. OCAL and PRAL obey Temkin's adsorption isotherm at both the temperatures. UV-reflectance, FT-IR and SEM studies confirm that the surface of mild steel is not affected at the maximum concentration of OCAL and PRAL. |
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Keywords: | Acidization Mild steel Alcohols Hydrochloric acid FT-IR Oil and gas production |
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