Investigating local corrosion processes of magnesium alloys with scanning probe electrochemical techniques: A review  

作　　者：Mara Cristina Lopes de Oliveira Rejane Maria Pereira da Silva Ricardo M.Souto Renato Altobelli Antunes 

机构地区：[1]Federal University of ABC,Center for Engineering,Modeling and Applied Social Sciences,Av.Dos Estados,500109210-580,Santo AndréSP Brazil [2]Instituto de Pesquisas Energéticas e Nucleares,IPEN/CNEN,Av.Prof.Lineu Prestes,2242,São Paulo,Brazil [3]Institute of Material Science and Nanotechnology,University of La Laguna,P.O.Box 456,La Laguna,Tenerife 38200,Spain

出　　处：《Journal of Magnesium and Alloys》2022年第11期2997-3030,共34页镁合金学报（英文）

摘　　要：The study of corrosion of magnesium and its alloys has emerged a hot topic in the applications of lightweight structural materials. The inherently high electrochemical activity of bare magnesium surfaces still lacks a convincing mechanism to describe the observed experimental characteristics, and it has prompted the development of various types of protective coatings with the aim of slowing metal dissolution. In recent years, new instruments and techniques have been developed to study with spatial resolution the local corrosion processes that occur in metallic materials in general, and for magnesium and its alloys in particular, both for bare surfaces and coated. Scanning microelectrochemical techniques, such as local electrochemical impedance spectroscopy(LEIS), scanning electrochemical microscopy(SECM), scanning vibrating electrode technique(SVET), scanning ion-selective electrode technique(SIET) and scanning Kelvin probe(SKP) can provide information about the local electrochemical activity of metallic surfaces. In the present work, the applications of these techniques in corrosion studies of magnesium and its alloys are reviewed. Assessment of corrosion mechanisms, barrier properties of conventional coatings and active corrosion behavior of self-healing coatings are examined. Limitations and future developments in this area are discussed.

关 键 词：Magnesium alloys LEIS SECM SVET SIET SKP 

分 类 号：TG172[金属学及工艺—金属表面处理]