A Review on Providing Nanocoating Based on Nanoparticles of Zinc Oxide on magnesium alloy AZ31B by Plasma Electrolytic Oxidation Method and its Corrosion and Antibacterial Properties

Although the high chemical activity of magnesium alloys has given these metals biodegradable properties and an important place as a sacrificial anode in protection issues, it has caused them to have important weaknesses in corrosion and wear resistance. Their use in industry should be limited. However, these weaknesses mostly interact with the material's surface and can be overcome using appropriate surface modification. Electrochemical plasma oxidation (PEO) is a popular method to modify the surface of magnesium alloys, which creates a ceramic coating layer on the surface of the alloy, which is not perfect. The presence of a porous structure in this layer is its important weakness because it is a suitable path for the penetration of corrosive agents to the bare surface of the substrate. One of the attractive issues for researchers is to deal with this porosity by using appropriate ceramic additives in the electrolyte during the process. Zinc oxide nanoparticles are a good option for this. These nanoparticles are multifunctional, and in this article, their effects on corrosion properties and antibacterial properties are investigated