The passivation of magnesium (Mg)-based alloys is an electrochemical behavior. The formation of a protective surface film results in passivation. The composition of this surface layer is influenced by the substrate alloy, which in turn affects the passive behavior. Recent studies have examined the composition of the surface film when Mg alloys undergo corrosion. Most of these studies have focused on the presence of Mg hydroxide (Mg(OH)₂) and MgO in the layer. However, a systematic examination of the impact of alloying elements on the stability of the passive layer is lacking. The essential question for developing a corrosion-resistant Mg-based alloy with passive protection is: which are the best and most efficient elements that can form a passive layer when alloyed with Mg? Passivity in a Mg alloy could be achieved by using a non-equilibrium technique to supersaturate the matrix phase with a high concentration of a strong passivating element. This review paper examines and explores the potential of creating a passive Mg-based alloy using metallurgical methods, like alloying and purification. Additionally, this paper explains key concepts about the passivity of Mg alloys and proposes possible methods to create a passive Mg alloy.

中文翻译：

---

揭示净化元素和合金元素对镁合金腐蚀性能和钝化的影响


镁 （Mg） 基合金的钝化是一种电化学行为。保护表面膜的形成导致钝化。该表面层的成分受基材合金的影响，而基材合金又会影响无源行为。最近的研究检查了 Mg 合金发生腐蚀时表面膜的成分。这些研究中的大多数都集中在层中氢氧化镁 （Mg（OH）₂） 和 MgO 的存在上。然而，缺乏对合金元素对钝化层稳定性影响的系统研究。开发具有钝化保护的耐腐蚀镁基合金的基本问题是：与镁合金化时可以形成钝化层的最佳和最有效的元素是什么？Mg 合金的钝化可以通过使用非平衡技术用高浓度的强钝化元素使基体相过饱和来实现。本综述论文检查并探讨了使用冶金方法（如合金化和提纯）制造钝化镁基合金的潜力。此外，本文解释了有关 Mg 合金钝化性的关键概念，并提出了制造钝化 Mg 合金的可能方法。