New green advanced biopolymer as a repairer of aged AA-5083 alloy immersed into dead seawater

Certainly, inhibitors are widely used to reduce corrosion rates of materials in many corrosive environments. However, when the substrate suffers from aggressive corrosion, inhibition still neither efficient nor cost-effective for the substrate performance. In this study, we test a new green biopolymer (diazonium grafted biosurfactant, noted R11) as a repairer of damage that happens to a 3-years-old AA-5083 bar immersed into Dead Seawater. Mechanism reparation has been detailed. Electrochemical techniques, X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM), were used to study, analyze and confirm the effect of reparation of AA-5083 alloy using the R11 compound. The reparation efficiency reached 96%.