Corrosion inhibitor is the substance when added to the corrosive solution to protect the corrosion rate of the metal. Organic species are preferred when compared to the inorganic compounds. Therefore, hence, in this investigation selected expired Lifebuoy and Dettol soap and analyze its corrosion inhibition property on the mild steel in the 5 % NaCl solution. Weight loss and atomic absorption spectroscopy (AAS) technique was employed to study the corrosion inhibition role of the expired Lifebuoy and Dettol soap. Both weight loss and atomic absorption spectroscopy study reveal that, mild steel corrosion in the NaCl solution decreases with a rise in the concentration of the inhibitors and enhances with a rise in the solution contact time. Expired Lifebuoy soap shows the superior corrosion inhibition property compared to the expired Dettol soap.
