Corrosion inhibition properties of the combinedudadmixture of thiocarbanilide andudhexadecyltrimethylammoniumbromide on mildudsteel in dilute acid solutions

摘要

The synergistic effect of the combined admixture of thiocarbanilide andudhexadecyltrimethylammoniumbromide on the electrochemical corrosion behaviorudand inhibition of mild steel in 1 M H2SO4 and HCl acid media was evaluated throughudweight loss analysis, potentiodynamic polarization technique, and IR spectroscopy.udResults show that the admixture performed effectively in both acid solutions withudan average HTH inhibition efficiency of 86.2 and 82% in H2SO4 acid from weightudloss and potentiodynamic polarization test while the corresponding values in HCludacid are 79 and 80%, respectively. Thermodynamic calculations showed that theudcompound chemically adsorbed onto the steel surface blocking the diffusion ofudcorrosive anions and simultaneously suppressing the redox electrochemical processudresponsible for corrosion. Infrared spectroscopic images revealed the presence ofudthe functional groups of the organic compound responsible for corrosion inhibition