Abstract: Plasma electrolytic oxidation (PEO) technique was used to prepare ceramic coatings on the casted aluminum alloys containing ~5 and ~9.5 wt.% Mg. The applied voltage was controlled at 450V and 550V for evaluating the effect of this main parameter, as well as, magnesium content of the substrate on the microstructure and electrochemical corrosion behavior after PEO treating. The results ...

A dense inner layer is highly valued among the surface coatings created through plasma electrolytic oxidation (PEO) treatment, because the PEO coating has been troubled by inherent porosity since its conception. To produce the favored structure, a proven technique is to prompt a soft sparking transition, which involves a sudden decrease in light and acoustic emissions, and a drop in anodic volt...

Discharge phenomena in electrolytes were discovered many decades ago. However, the research and development of plasma oxidation for surface engineering have only truly been actively performed recent years, particularly stimulated by a review paper entitled Plasma Electrolysis Surface Engineering published 1999. Among electrolysis processes, electrolytic (PEO) caught most attention from academic...

Abstract Erosion of an aluminium oxide surface as well a formation coating on substrate, comparable with erosion and induced by plasma electrolytic oxidation (PEO), can be caused at atmospheric pressure conditions DBD-like (Dielectric Barrier Discharge) jet. Obtained experimental results conform previously assumed similarity the mechanisms jet PEO microdischarges. The mechanism predominantly in...

The properties of coatings formed on the MA8 magnesium alloy by plasma electrolytic oxidation in electrolytes containing multi-walled carbon nanotubes concentrations 2, 4 and 6 g/l have been investigated. It was found that introduction leads to an increase adhesive strength, microhardness Young’s modulus obtained layers.