abstract
Corrosion protection and surface properties of Magnesium (Mg) containing 51 ppm Fe (HP-Mg) and 341 ppm Fe (CP-Mg) were assessed by EIS, AFM/SKPFM, and photoluminescence spectroscopy in NaCl solutions with/ without fumarate (Fum), 2,5-pyridinedicarboxylate (PDCA) and salicylate (Sal) carboxylates. The PDCA was effective in corrosion inhibition of HP-Mg and CP-Mg, while the Sal was efficient in inhibition of CP-Mg only. Volta potential (VPD) changes on Mg were evaluated considering the contribution of molecular dipoles and chemical dipoles due to interaction of carboxylate groups present in carboxylates with Mg. VPD of CP-Mg increased due to adsorption of Fe(III)-salicylate complexes and salicylate molecules.
keywords
SCANNING KELVIN PROBE; ANODIC HYDROGEN EVOLUTION; FORCE MICROSCOPY; PURE MAGNESIUM; PHOTOCURRENT SPECTROSCOPY; DIPOLE-MOMENTS; WORK FUNCTION; SURFACE-FILM; OXIDE-FILMS; IN-SITU
subject category
Materials Science; Metallurgy & Metallurgical Engineering
authors
Yasakau, KA; Maltseva, A; Lamaka, SV; Mei, D; Orvi, H; Volovitch, P; Ferreira, MGS; Zheludkevich, ML
our authors
Kiryl Yasakau
Assistant Researcher
Mário Guerreiro Silva Ferreira
Retired Professor
Mikhail Zheludkevich
Invited Principal ResearcherProjects
Projeto de Investigação Exploratória: Kyril Yasakao (IF/01284/2015)
acknowledgements
K.A. Yasakau acknowledges the Portuguese Foundation for Science and Technology (FCT) for the Researcher grant (IF/01284/2015). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES.