Effect of preliminary etching of alloy ML5 before plasma electrolytic oxidation

Kozlov I.A., Vinogradov S.S., Uridiya Z.P., Duyunova V.A., Manchenko V.A.
UDC
669.721.5
DOI
10.18577/2307-6046-2018-0-9-32-42
Article PDF (Russian) (729.22 KB)
How to cite
Kozlov I.A., Vinogradov S.S., Uridiya Z.P., Duyunova V.A., Manchenko V.A. Effect of preliminary etching of alloy ML5 before plasma electrolytic oxidation // Proceedings of VIAM. 2018. No. 9. DOI: 10.18577/2307-6046-2018-0-9-32-42. URL: https://test.viam.ru/en/journal/2018/9/4
Keywords
plasma electrolytic oxidation, microarc oxidation, anodic oxidation, magnesium alloys, coating structure, surface preparation.
Abstract

Protection of magnesium alloys by method of plasma electrolytic oxidation is the most perspective. Protective properties of received coverings in big degree depend on surface structure of magnesium alloy. Availability on surface of alloy the phases containing aluminum, the Mg17Al12 type leads to covering forming with large amount of through defects. Preliminary etching of magnesium alloy in solution of alkali or fluoric acid significantly reduces porosity of covering and, therefore, increases its protective properties.

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