EFFICIENT CORROSION INHIBITORS BY RECOVERY OF PHARMACEUTICAL WASTE

The main objective of the present paper is the preliminary investigation and development of new applications for expired drugs, in contrast to the current regulations regarding the controlled destruction of pharmaceutical waste by different methods. The new applications studied are based on the anticorrosive inhibitory properties of the active compounds from different drugs and even of the compositions as such, on metallic materials in aggressive environments with acid pH. In this paper, the possibility to recover pharmaceutical waste achieved from expired drugs, paracetamol (PA) and carbocysteine (CS), in order to use it as corrosion inhibitors for carbon steel in acid solutions has been investigated. 1N HCl aqueous solution has been used as corrosive medium in the experimental studies. Electrochemical behavior of PA and CS and its inhibitor efficiency in test solutions have been examined by open circuit potential and gravimetric methods.