© The Author(s) 2015. Published by ECS.The filiform-like corrosion of extruded Mg alloy AM30 immersed in a dilute near-neutral NaCl solution was investigated using electrochemical techniques coupled with transmission electron microscopy (TEM). Scanning vibrating electrode technique (SVET) measurements showed that the filament-like corrosion consisted of an intensely anodic propagation front supported by a cathodically-activated filament behind. The TEM examination of the corroded and intact surface films in cross-section using thin foils prepared by focused-ion-beam (FIB) milling indicated that the cathodic activity was likely a combined result of the formation of a thick, highly-defective MgO film and the ability of Al-Mn intermetallic particles to catalyze the cathodic H2 gas evolution reaction. The formation of an Al-rich layer at the film/alloy interface with time, due to the incongruent dissolution of the alloy, was not able to stop the initiation and propagation of the filaments.
CITATION STYLE
Cano, Z. P., McDermid, J. R., & Kish, J. R. (2015). Cathodic Activity of Corrosion Filaments Formed on Mg Alloy AM30. Journal of The Electrochemical Society, 162(14), C732–C740. https://doi.org/10.1149/2.0381514jes
Mendeley helps you to discover research relevant for your work.