Corrosion and tribocorrosion protection
A new study describes a novel way for the protection of AZ31B Mg alloy by a hydrothermally treated surface with PEO/chitosan composite coating.
A new study was aimed at the enhancement of the corrosion and tribocorrosion performance of AZ31B magnesium (Mg) alloys after plasma electrolytic oxidisation (PEO) treatment. Some PEO-treated Mg samples were coated with chitosan (CS) film by dip-coated method, while others were subjected to hydrothermal treatment (HT) followed by CS film. Corrosion resistance of the specimens was evaluated via electrochemical measurements in simulated body fluid.
Better corrosion and tribocorrosion performance
Test results indicated that better corrosion and tribocorrosion performance were observed when the CS layer is applied on hydrothermally treated PEO samples than on the bare PEO samples. Thus, fabrication of hydrothermally treated PEO surface coatings with chitosan is a significant approach to protect the Mg from corrosion and tribocorrosion, thereby increasing the potential application of Mg alloy as biological implants.
The study has been published in Progress in Organic Coatings, Volume 170, September 2022.
