3-(4-bromo-phenylimino)-1,3-dihydro-indol-2-one, was used to evaluate the biocorrosion inhibition efficiencyonmild steel coupons in the presence of sulphate-reducing bacteria (SRB). The results were compiled fromgravimetricanalysis using the weight-loss method, electrochemical analysis through open-circuit potential (OCP) andpotentiodynamic polarisation (PdP), and topological screening with scanning electron microscopy (SEM) andenergy-dispersive X-ray analysis (EDX). The results revealed that the highest corrosion rate was observed for theuntreated MS coupon, at 0.01611 mg/cm2h 1 , and the highest inhibition efficiency was observed at 500 ppm, with77.00% inhibition and a corrosion rate of 0.00322 mg/cm2 /h 1 after 216 hours at 30 0 ; the I.E%declined as thetemperature increased. The best-fitting graph for the adsorption study was the Langmuir isotherm, which forms amonolayer of inhibitor molecules. A -ΔG0 ads indicates spontaneous behaviour of the system, with correlatinggravimetric and electrochemical analyses with each other. SEM and EDX show that bacterial attachment onthesurface was reduced in the treated MS coupons compared to the untreated MS coupons. From the above experiments, the test synthesised compound was efficient at slowing the biocorrosion process in a simulated system.