An Acid Inhibitor Research: 5-Phenyl-1H-1,2,4-triazole-3-thiol

Abstract

The effect of 5-Phenyl-1H-1,2,4-triazole-3-thiol (5PTT) on the corrosion of mild steel which is used in the industry-widely, in hydrochloric acid solution was investigated as electrochemically and qualitatively. Inhibition efficiency of 5PTT on mild steel surface was studied by EIS, potentiodynamic polarization, SEM and FTIR techniques. The experiments show that the 5PTT molecule forms an effective film to protect the mild steel in the acid solution. The inhibition efficiency obtained from the experiments was found to be 97.9%. It is understood that 5PTT is effective as a mixed type inhibitor against acid corrosion of mild steel.