Adsorption and corrosion inhibition properties of thiocarbanilide on the electrochemical behavior of high carbon steel in dilute acid solutions
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The inhibition performance of thiocarbanilide on the electrochemical corrosion behavior of high carbon
steel in 1 M H2SO4 and HCl acid solutions was studied through weight loss method and potentiodynamic
polarization test. Data obtained showed that the organic compound performed effectively in acid solutions
at all concentrations with an average thiocarbanilide inhibition efficiency above 70% in H2SO4 acid
and 80% in HCl acid from weight loss and potentiodynamic polarization test respectively. Results from
corrosion thermodynamic calculations showed that the adsorption of thiocarbanilide onto the steel
was through chemisorption mechanism whereby the redox electrochemical process responsible for corrosion
and the electrolytic transport of corrosive anions were simultaneously suppressed. Statistical
derivations through ANOVA analysis confirm that the influences of both the inhibitor concentration
and exposure time on inhibition efficiency values are negligible. Adsorption of the compound was determined
to obey the Langmuir and Frumkin isotherm model
Keywords
T Technology (General), TJ Mechanical engineering and machinery