Keywords :
Cerium salts; Cut-edge; Galvanic corrosion; SVET; Zinc-based coating; Coated steel; Cut edge; Electrochemical techniques; Polarization curves; Sacrificial coatings; Scanning vibrating electrochemical technique; Theoretical approach; Zinc-based coatings; Mechanics of Materials; Mechanical Engineering; Metals and Alloys; Materials Chemistry
Abstract :
[en] The effect of cerium salts on the cut-edge of zinc-based sacrificial coated steel was investigated by theoretical approach (based on individual polarization curves on the top surface and by Scanning Vibrating Electrochemical Technique (SVET). In both approaches, cerium salts increase the galvanic corrosion of zinc-based sacrificial layer coupled with steel. Furthermore, the anion parts of cerium salts exhibited a synergistic accelerated effect of galvanic activity on the cross-section. The SVET results indicated that the addition of Al, Mg alloying elements promotes localized corrosion and influences the formation and distribution of corrosion products.
Name of the research project :
4617 - ARES PRD 2020 - Vietnam - Renforcement de l'expertise du centre de compétences en protection contre la corrosion et en éléctrochimie - Fédération Wallonie Bruxelles
Funding text :
The authors would like to thank ArcelorMittal for providing the metallic substrate and Sebastien Colmant from the Metallurgy Department for his help in preparing the embedded samples. This study was supported by the Académie de Recherche et d′Enseignement Supérieur (ARES Belgium) through the Development Cooperation project between Vietnam and Belgium (PRD 2020–2025 : Renforcement de expertise environnementale du centre de compétences en protection contre la corrosion et en électrochimie), and National Foundation for Science and Technology Development under grant number 104.06-2019.20 .
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