Composite fluoropolymer coatings on Mg alloys formed by plasma electrolytic oxidation in combination with electrophoretic deposition

摘要

Using the methods of plasma electrolytic oxidation (PEO) and electrophoretic deposition, the approaches to formation of composite protective coatings on magnesium alloys have been developed in order to improve their corrosion resistance and reduce the wear degree. A complex study of electrochemical and tribological characteristics and morphological features of the obtained composite coatings on the magnesium alloy MA8 has been performed. It has been established that polymer-containing coatings reduce the corrosion current density by three orders of magnitude (I = 2.0.10(-10) A/cm(2)) and the wear rate by two orders of magnitude (1.2.10(-6) mm(3)/(N.m), as compared to the base PEO-coating. (C) 2015 Elsevier B.V. All rights reserved.