Preparation and electrochemical characterization of amoxicillin-doped cellulose acetate films for AA2024-T3 aluminum alloy coatings

Cellulose acetate films doped with amoxicillin were deposited onto AA2024-T3 aluminum alloy and the corrosion protection in 0.05 M NaCl was evaluated by Electrochemical Impedance Spectroscopy (EIS) and the Scanning Vibrating Electrode Technique (SVET). The doping of the cellulose acetate film with amoxicillin resulted in a significant increase in the high frequency resistance and a decrease in the capacitance of the material. The protective effect could be observed under anodic polarization by way of a marked decrease in the anodic current. These results show the promising potential for the deposition of cellulose acetate films doped with amoxicillin onto AA2024-T3.

Research highlights► CA films with 2000 ppm of amoxicillin directly on the AA2024-T3 substrate, providing good anticorrosion properties. ► Synergistic effect obtained by doping the CA film with amoxicillin. ► Amoxicillin shows a inhibition action towards AA2024-T3 with acetic cure and using 1 min of deposition time.