Inhibition of mild steel corrosion in hydrochloric acid environment by 1-amino-2-mercapto-5-(4-(pyrrol-1-yl)phenyl)-1,3,4-triazole

••New derivative of 1,3,4-triazole have been synthesized.••The inhibition efficiency of this inhibitor has been studied for mild steel corrosion in 1M HCl.••The inhibitor acted as mixed type inhibitor and obeyed langmuir adsorption isotherm.••The inhibition efficiency increased with increasing the inhibitor concentration.••The adsorption of inhibitor on mild steel surface is mixed physical and chemical adsorption.