Exploring the Potential of a Green Synthesized Chromene Derivative as an Inhibitor for Copper Corrosion in Acidic Environments: A Combined Experimental and Theoretical Investigation

This research investigates the effectiveness of a newly developed chromene derivative (AHBCC), in preventing copper corrosion in a 0.5 mol/L HCl solution. The study utilizes a blend of experimental techniques, including electrochemical measurements, complemented by theoretical methods, supported by surface analysis techniques (UV–visible spectroscopy and atomic force microscopy). Results from the experiments indicate a substantial reduction in copper corrosion in the presence of AHBCC, with inhibition efficiencies exceeding 90% at the optimal concentration. Potentiodynamic polarization analysis suggests that AHBCC demonstrates a mixed-type corrosion inhibition behavior. Our investigation using impedance spectroscopy suggests a rise in charge transfer resistance (R_ct) as inhibitor concentration increased. This indicates that a protective layer formed on the copper surface. UV–visible spectroscopy analysis aligns with a Langmuir isotherm model for the adsorption of AHBCC molecules, signifying a chemical interaction between AHBCC and the copper surface. Additionally, atomic force microscopy confirms the creation of a protective layer, further supporting the hypothesis that AHBCC shields the copper from corrosion. Theoretical calculations support the adsorption of AHBCC molecules on the copper surface. This integrated experimental and theoretical approach offers a comprehensive insight into the corrosion inhibition mechanism of AHBCC on copper in acidic environments, showcasing its potential as an eco-friendly and efficient corrosion inhibitor for various industrial purposes.