Comparative analysis of methods for ion-plasma sputter deposition and micro-arc oxidation

We describe the following advantages of micro-arc oxidation (MAO) over ion-plasma sputter deposition of coatings. The equipment for MAO is cheaper (a vat with inexpensive electrolyte and a power source, as opposed to an expensive ion-plasma sputter deposition unit); higher coating adhesion; the ability to produce thicker coatings (hundreds as opposed to tens of microns); lack of [required] surface preparation operations (degreasing, etching, rinsing); and simplicity of operation by personnel. These advantages make micro-arc oxidation a promising technique for metallurgical and metalworking enterprises, where it can be used to provide increased wear resistance, better electrical insulation properties, thermal insulation properties, and corrosion properties for specialized tools and parts.