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Plasma Electrolyte Oxidation (PEO) technique is a fast growing approach to resolve the weight load in automotive industry by creating a thin layer of a ceramic coating on lighter alloys such as aluminum for different parts like engine blocks. Of course in a hot and corrosive environment such as an engine, the main concern would be corrosion and wear effects on the engine. ...The goal of this research is to study the effect of different factors such as solution type, power input variations and coating thickness on wear resistance of aluminum Al 319.

In this paper, a plasma electrolytic oxidation (PEO) process was used to produce ceramic oxide coatings on aluminized UHSS and Mg with intention to further improve their corrosion resistances. ...Galvanic corrosion of the aluminized UHSS and magnesium alloy coupling with and without PEO coatings was studied by a zero resistance ammeter (ZRA) test. It was found that the heating-cooling process simulating the hot stamping would reduce anti-corrosion properties of aluminized UHSS due to the outward iron diffusion. ...The PEO coating could reduce corrosion current and increase corrosion potential of aluminized UHSS. A denser PEO coating, usually produced using a bipolar current processing mode and thus showing a higher polarization corrosion resistance, was not always good for the galvanic corrosion prevention of the steel and Mg coupling.

Based on the research, this article briefly discusses employing plasma electrolytic aluminating to coat 52100 alloy steel samples, an eco-friendly and high-efficiency coating process. Coating experiments were conducted over different coating periods to determine the most appropriate thin film for 52100 alloy steel samples. ...Alumina coatings are suitable for insulating the 52100 alloy steel samples because alumina coatings provide excellent insulation, hardness, and corrosion resistance, among other characteristics. ...Longer treatment period resulted in thicker coating layers, but a rougher surface. The results indicated that extending the coating period increased the insulating characteristics of the ceramic coating on 52100 alloy steel samples.

A chromium nitride (CrN) coating with plasma nitriding case hardened layer on a die material (duplex treatment) is found to offer good wear and galling resistances. The coating failure initiates from fatigue cracking on the coating surface due to cyclic sliding frictions. ...Stamping of AHSS with conventional die materials and surface coatings, however, results in frequent die failures and undesired panel surface finish. A chromium nitride (CrN) coating with plasma nitriding case hardened layer on a die material (duplex treatment) is found to offer good wear and galling resistances. ...A chromium nitride (CrN) coating with plasma nitriding case hardened layer on a die material (duplex treatment) is found to offer good wear and galling resistances.

To further increase the wear resistance of the MMC, in this research, Plasma Electrolytic Oxidation (PEO) process was used to form oxide coatings on the MMC. The hard and wear-resistant oxide coatings protected the metal matrix during the wear tests, reducing the wear rate of MMC. ...The effect of both oxide coating thickness and volume content of SiO₂ particles on the wear behavior of MMC was investigated. ...It was found that with a proper combination of the volume content of SiO₂ and coating thickness, the MMC exhibited high wear resistance and low friction coefficient.