Study on the compounding of cysteine modified Schiff base and decanoic acid as corrosion inhibitors for bronze with patina

This study employed a combined experimental and theoretical approach to investigate the synergistic corrosion inhibition and mechanism of l-cysteine (CYB)-modified Schiff bases (Schiff bases) and decanoic acid (HC10) as environmentally friendly corrosion inhibitors on corroded bronze in a 3.5 wt% NaCl solution. Surface and electrochemical analysis techniques were used to assess the inhibitor effectiveness, permeability and quantify solution reinforcement effect through compressive testing. Additionally, quantum chemical calculations based on density functional theory (DFT), molecular dynamics simulations (MD), and x-ray photoelectron spectroscopy (XPS) were employed to validate the mechanism of synergistic corrosion inhibition. The results indicate that the two molecules cooperate to impede corrosion via competitive adsorption, while also displaying high permeability and reinforcement properties.