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This study analyzed the gravimetric and electrochemical effects of C₁₆H₁₃N₃O₃ (methyl-5-benzoyl-2-benzimidazole carbamate: Mebendazole) on mild steel corrosion in 0.5 M H₂SO₄, for gaining insights on correlation and significance of differences between the two corrosion-monitoring techniques. For the gravimetric method, weight loss of mild steel specimens immersed in different C₁₆H₁₃N₃O₃ concentrations mixed in the 0.5 M H₂SO₄ were obtained for corrosion rates and inhibition efficiencies estimations. For the electrochemical approach, mild steel samples were subjected to potentiodynamic polarization experiments in the different C₁₆H₁₃N₃O₃ concentrations in 0.5 M H₂SO₄ that were employed for the gravimetric technique for obtaining instrumental readout of corrosion rate. Results showed that the corrosion rate from the electrochemical experiments exhibited excellent linear correlation (R = 99.91 …