Properties of composite coatings formed by treatment of PEO-layers with fluoroparaffins

The formation of protective multifunctional coatings on the MA8 magnesium alloy using the method of plasma electrolytic oxidation (PEO) and subsequent treatment with fluorocarbon materials has been suggested. A complex study of tribological characteristics and morphological features of the obtained composite coatings has been carried out. After the treatment of the PEO-coating with fluoroparaffins the wear resistance has increased by more than 10 times as compared to the base PEO-layer. Hydrophobic properties of the composite coatings have been studied. It was established the contact angle changed in the range from 122° up to 137° depending on the flouroparaffin type. (paper)