Flash-PEO as an alternative to chromate conversion coatings for corrosion protection of Mg alloy

Wierzbicka, E,; Vaghefinazari, B,; Lamaka, S.V,; Zheludkevich, M.L,; Mohedano, M,; Moreno, L,; Visser, P,; Rodriguez, A,; Velasco, J,; Arrabal, R,; Matykina, E.

Journalpaper

Flash-PEO as an alternative to chromate conversion coatings for corrosion protection of Mg alloy

Abstract

In the present work, a flash-PEO coating is developed on AZ31B alloy in a combination of silicate, phosphate, and fluoride based electrolyte in order to offer a green alternative to chromate conversion coatings. Multilevel active protection is achieved through synergetic combination of self-sealing effect of PEO coating itself and active inhibition provided by an organic inhibitor impregnated in PEO pores in a post-treatment step. The results indicate that flash-PEO coatings, loaded with organic corrosion inhibitors, can be recommended for exploitation on industrial level as an equally effective corrosion protection system alternative to CCC for paint-bearing and paint-free applications.

DOI Link to Publication

URL: https://publications.hereon.de/id/39410/
Authors:Wierzbicka, E,, Vaghefinazari, B,, Lamaka, S.V,, Zheludkevich, M.L,, Mohedano, M,, Moreno, L,, Visser, P,, Rodriguez, A,, Velasco, J,, Arrabal, R,, Matykina, E.
Year:2021
In: Corrosion Science
Volume:180
Pages:109189
Publisher:Elsevier, Orlando
Type:Journalpaper
ISSN: 0010-938X
Cite as: Wierzbicka, E,; Vaghefinazari, B,; Lamaka, S.V,; Zheludkevich, M.L,; Mohedano, M,; Moreno, L,; Visser, P,; Rodriguez, A,; Velasco, J,; Arrabal, R,; Matykina, E.: Flash-PEO as an alternative to chromate conversion coatings for corrosion protection of Mg alloy. In: Corrosion Science. Vol. 180 (2021) 109189. (DOI: /10.1016/j.corsci.2020.109189)