Abstract
AbstractThe synergistic effect of the combined admixture of thiocarbanilide and hexadecyltrimethylammoniumbromide on the electrochemical corrosion behavior and inhibition of mild steel in 1 M H2SO4 and HCl acid media was evaluated through weight loss analysis, potentiodynamic polarization technique, and IR spectroscopy. Results show that the admixture performed effectively in both acid solutions with an average HTH inhibition efficiency of 86.2 and 82% in H2SO4 acid from weight loss and potentiodynamic polarization test while the corresponding values in HCl acid are 79 and 80%, respectively. Thermodynamic calculations showed that the compound chemically adsorbed onto the steel surface blocking the diffusion of corrosive anions and simultaneously suppressing the redox electrochemical process responsible for corrosion. Infrared spectroscopic images revealed the presence of the functional groups of the organic compound responsible for corrosion inhibition. Statistical derivations through Analysis of variance...
Highlights
Carbon steel is one of the most important engineering material extensively applied in automotive, construction, consumer, marine, mining and chemical processing industries, and petrochemical plants for applications involving acids, alkalis, and chloride environments due to its low cost and ready availability
This research aims to investigate the synergistic effect of the admixture of thiocarbanilide and hexadecyltrimethylammoniumbromide (HTH) on mild steel in dilute acid solutions of 1 M H2SO4 and 1 M HCl through weight loss analysis, potentiodynamic polarization test, and numerical analysis through Analysis of variance (ANOVA) and infrared spectroscopy
Potentiodynamic polarization The potentiodynamic polarization plots of HTH compound on the corrosion inhibition of the mild steel specimen in 1 M H2SO4 and HCl acids are presented in Figures 2 and 3
Summary
Carbon steel is one of the most important engineering material extensively applied in automotive, construction, consumer, marine, mining and chemical processing industries, and petrochemical plants for applications involving acids, alkalis, and chloride environments due to its low cost and ready availability. It provides material properties that are acceptable for many applications as such their corrosion is a fundamental academic and industrial concern. They suffer from pitting and general corrosion which result in them being continually replaced after rapid severe deterioration. Selection of materials of construction which are completely resistant to corrosion from corrosive fluids is possible, but the cost of such an approach is most often restrictive (Corrosion in Process Industries, n.d.)
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