Investigation of alumina formed by plasma electrolytic saturation

TL;DR

This paper investigates the plasma electrolytic process for alumina coating on steel, analyzing coating morphology and its impact on corrosion resistance, highlighting the challenges of uniformity and surface finish.

Contribution

It provides detailed characterization of alumina coatings formed by plasma electrolytic saturation and assesses their corrosion resistance properties.

Findings

Coating size is approximately 6 microns with cauliflower shape.

Coating acts as a passive layer, slightly increasing corrosion resistance.

Lack of uniformity and surface finish limits corrosion resistance improvement.

Abstract

The process of alumina coating on the steel surface plasma electrolytic method is a method for increasing the corrosion resistance, in this process, electrolytic aluminum containing compounds should be able to cover the surface. The results show the size of a micron coating of cauliflower shape and distance of an average of about 6 microns. The coating on steel sample acted as a passive layer and corrosion resistance increases slightly. This is due to the low corrosion resistance because of the lack of uniformity and surface finish are not.