This work investigated the effectiveness of 1-(((4-bromophenyl)imino)methyl)naphthalen-3-ol, a nanosized Schiff base, in preventing mild steel corrosion in HCl using weight loss measurements and surface characterization. Using the weight loss method, the synthesized compound's efficacy as a corrosion inhibitor in an acidic medium was assessed. Maximum inhibition efficiency was found at an ideal dose of 1×10-3 M for the inhibitor at 298 K. The DPPH-free radical activity's ability to scavenge radicals led to an investigation of the Schiff base's antioxidant activity. The Schiff base exhibited good antioxidant action.