Understanding the interaction between cyclic stresses and corrosion of magnesium (Mg) and its alloys is increasingly in demand due to the continuous expansion of structural applications of these materials. This review is dedicated to exploring the corrosion-fatigue mechanisms of these materials, with an emphasis on microscale processes, and the possibility of expanding current knowledge on this topic using scanning electrochemical techniques. The interaction between fatigue and corrosion of Mg alloys is analyzed by considering the microstructural aspects (grain size, precipitates, deformation twins), as well as the formation of pits. Furthermore, in the case of coated alloys, the role of coating defects in these phenomena is also described. In this context, the feasibility of using scanning electrochemical microscopy (SECM), scanning vibrating electrode technique (SVET), scanning ion-selective electrode technique (SIET), localized electrochemical impedance spectroscopy (LEIS) and scanning Kelvin probe (SKP) methods to study the corrosion-fatigue interaction of Mg alloys is examined. A comprehensive review of the current literature in this field is presented, and the opportunities and limitations of consolidating the use of these techniques to study the microscale processes involved in Mg corrosion-fatigue are discussed.

中文翻译：

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镁合金腐蚀与疲劳协同作用的综述：微观尺度的机制和过程


由于镁 (Mg) 及其合金的结构应用不断扩展，人们越来越需要了解镁 (Mg) 及其合金的循环应力与腐蚀之间的相互作用。本综述致力于探索这些材料的腐蚀疲劳机制，重点是微观过程，以及使用扫描电化学技术扩展该主题当前知识的可能性。通过考虑微观结构方面（晶粒尺寸、析出物、变形孪晶）以及凹坑的形成，分析镁合金疲劳与腐蚀之间的相互作用。此外，在涂层合金的情况下，还描述了涂层缺陷在这些现象中的作用。在此背景下，利用扫描电化学显微镜（SECM）、扫描振动电极技术（SVET）、扫描离子选择电极技术（SIET）、局域电化学阻抗谱（LEIS）和扫描开尔文探针（SKP）方法进行研究的可行性研究了镁合金的腐蚀-疲劳相互作用。对该领域的当前文献进行了全面回顾，并讨论了巩固使用这些技术来研究镁腐蚀疲劳所涉及的微观过程的机会和局限性。