Quinolinyl triazole derivatives-Dominant Inhibitors for mild steel in hydrochloric acid

Abstract−Quinolinyl triazole derivatives 4-(4-chlorophenyl)-5-{[(5-chloroquinolin-8-yl)oxy]methyl}-2,4-dihydro-3H-1,2,4-triazole-3-thione (4-4CPCQMT), 4-(3-chlorophenyl)-5-{[(5-chloroquinolin-8-yl)oxy]methyl}-2,4-dihydro-3H-1,2,4-triazole-3-thione (4-3CPCQMT) and 4-(4-fluorophenyl)-5-{[(5-chloroquinolin-8-yl)oxy]methyl}-2,4-dihydro-3H-1,2,4-triazole-3-thione (4-4FPCQMT) are of great importance in pharmaceutical chemistry such as antifungal, antituberculosis, anticonvulsant, anticancer activities, etc. The present work highlights the synthesis of the quinolinyl triazole derivatives ((4-4CPCQMT, 4-3CPCQMTand 4-4FPCQMT). The substituents present and the compounds 4-4CPCQMT, 4-3CPCQMTand 4-4FPCQMT were confirmed by FTIR and NMR spectroscopy. These compounds having many reactive sites were used as inhibitors for mild steel in 1.0 M hydrochloric acid medium at 303 to 323K. An inhibition study was done by electrochemical measurement. The prevention efficiency is in the order 4-4FPCQMT>4-4CPCQMT>4-3CPCQMT. The surface morphology of the mild steel surface was done using SEM, AFM and, EDX.