Synthesis and Characterization of Novel Quinoline–Carbohydrazide Hybrids With Dual Functionality: Corrosion Inhibition and Antimicrobial Activity

The present work reports the synthesis and characterization of novel quinolinobenzimidazole‐carbohydrazides (12a–12f) and quinolino‐benzohydrazides (13a–13f). The compounds were characterized using FT IR, NMR, and mass spectrometry. Further, the corrosion inhibitory action of 13b‐CMNPB (C 20 H 17 Cl 2 N 5 O 3 ) in 1 M HCl was investigated using electrochemical techniques and surface morphological analysis (SEM) at 298 K. The presence of multiple heteroatoms (N, O, and Cl) in 13b‐CMNPB is anticipated to favor adsorption on the metal surface, contributing to its corrosion inhibition performance even at low concentrations. In addition, the synthesized compounds were evaluated for their antibacterial and antifungal activities.