Abstract
Inappropriate disposal of unwanted, damaged, or expired medications poses a significant environmental threat, prompting scientists to look for greener solutions. Repurposing these medications as corrosion inhibitors is a viable strategy that has been investigated in the instance of the anti-inflammatory medication Fenoprofen (PPPA). Experiments on electrochemistry and weight loss showed that PPPA is a more potent corrosion inhibitor for copper in sulphuric acid solution than other medications. Higher concentrations of PPPA were found to increase polarization resistance and decrease double-layer capacitance, respectively, according to the results of electrochemical impedance spectroscopy, suggesting that PPPA can prevent copper from corroding. In addition, PPPA acts as a mixed-type inhibitor, affecting both anodic and cathodic processes. Thermodynamic and activation analyses confirmed the physico-chemical adsorption of PPPA on the metal surface, forming a protective barrier against acid attack. Experimental and computational results corroborate each other, underlining PPPA's potential as an effective and environmentally-friendly corrosion inhibitor.
Published Version
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