Comparative study of inhibitory efficacy of drug (Acetaminophen) in 1 M HCl medium applied to carbon and mild steels

Metals and alloys differ from other materials in a number of advantageous properties, but they have disadvantages because of their instability in contact with certain media. This leads to a decrease in their corrosion resistance, the costs of which are enormous, especially in industrialized countries. These costs could be higher without corrosion protection. The durability of steel structures depends mainly on their corrosion resistance. The protection technique of adding corrosion inhibitors Acetaminophen (A1) was studied using low and high carbon steels (mild and XC48 steels). This work was conducted by gravimetric and electrochemical measurements (current–voltage stationary curves). Acetaminophen (A1) inhibited both corrosion of XC48 steel and mild steel in HCl solution (1 M). The results show that the products work as inhibitors for both steels and the inhibition efficiencies at the concentration of 5 × 10-3(M) are interesting. This inhibitor adsorbs to the surface of both metal XC48 and mild steel MS. The effect of chemical composition of steel was also discussed.