File(s) under embargo
Insight into the Effect of Mg(OH)2 Films vs. Noble Element Enrichment on the Global and Local Cathodic Activation of Corroding Mg
journal contributionposted on 2023-10-26, 02:48 authored by TW Cain, CF Glover, JS Laird, N Birbilis, JR Scully
The anodically-enhanced cathodic activation of high-purityMg was studied by global and local electrochemical measurements in unbuffered 0.6 M NaCl, 0.6 M NaCl saturated in Mg(OH)2, 0.1 M MgCl2, 0.1 M Na2SO4, and 0.1 M tris(hydroxymethyl)aminomethane hydrochloride (TRIS). The selection of diverse aqueous environments was deliberate in order to explore the effect of dissolution product upon subsequent cathodic activation. Cathodic activation was found to be strong in all of the chloride-containing environments where a porous hydroxide forms; weak in Na2SO4 where a denser, more compact hydroxide forms; and negligible in TRIS where no hydroxide forms. Elemental enrichment, mapped using microparticle-induced x-ray emission, revealed the enrichment of Fe only in Cl-containing environments, suggesting that noble metal enrichment provides a stronger influence on cathodic activation than that of Mg(OH)2 films.
Publication classificationC1.1 Refereed article in a scholarly journal
PublisherNATL ASSOC CORROSION ENG
Science & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials Sciencecathodic activitymagnesiumSVETPIXEENHANCED CATALYTIC-ACTIVITYANOMALOUS HYDROGEN EVOLUTIONMAGNESIUM ALLOYSCORROSION-RESISTANCEANODIC HYDROGENCHLORIDESURFACEBEHAVIORMICROSTRUCTUREDISSOLUTION