Magnesium and its alloys demonstrate excellent features such as machinability, high strength to weight ratio, and damping capacity, which has expanded their applications to industries such as electronics, aerospace, and transportation. Magnesium has bone-like mechanical properties making it an ideal candidate for many biomedical applications. However, the high reactivity of magnesium makes it prone to corrosion attacks, even in mildly corrosive environments. So far, various coatings have been employed to protect magnesium and its alloys against corrosion. Plasma electrolytic oxidation (PEO) is a relatively new coating process that can successfully enhance the corrosion resistance of certain metals and their alloys. This process may look similar to the ordinary anodizing at the beginning but ends with ignition at higher applied potentials. The ignition property turns the oxide layer into a thick ceramic coating with good properties such as high hardness, good abrasion, and corrosion properties, as well as a strong bond to the substrate material. One of the most influential parameters in the PEO process is the chemical composition of the electrolyte. Changing the electrolyte conditions based on the presence of particles is one of the most useful strategies to reduce the porosity of the coating and enhance final properties. Graphene is a newly discovered carbon allotrope with excellent electrical properties, high thermal conductivity, and excellent mechanical properties. This article reviews the effect of graphene and graphene oxide addition on the corrosion and wear behaviors of PEO coatings on magnesium alloys. Due to the crucial role of morphology and thickness of coatings on corrosion and wear behavior, these aspects are extensively discussed in this review.

镁及其合金表现出出色的性能，例如可切削性，高强度重量比和阻尼能力，从而将其应用扩展到电子，航空航天和运输等行业。镁具有类似骨骼的机械性能，使其成为许多生物医学应用的理想之选。但是，镁的高反应活性使其即使在轻度腐蚀的环境中也容易受到腐蚀。迄今为止，已经采用了各种涂层来保护镁及其合金免受腐蚀。等离子体电解氧化（PEO）是一种相对较新的涂层工艺，可以成功提高某些金属及其合金的耐腐蚀性。此过程一开始可能看起来与普通的阳极氧化类似，但以较高的施加电势着火结束。着火性能使氧化物层变成具有良好性能（如高硬度，良好的耐磨性和腐蚀性能）以及与基材牢固结合的厚陶瓷涂层。PEO过程中最有影响力的参数之一是电解质的化学组成。基于颗粒的存在来改变电解质条件是降低涂层孔隙率并增强最终性能的最有用的策略之一。石墨烯是一种新发现的碳同素异形体，具有优异的电性能，高导热性和出色的机械性能。本文综述了石墨烯和氧化石墨烯的添加对镁合金上PEO涂层的腐蚀和磨损行为的影响。