Two-Step Anodization of AZ91 Magnesium Alloy

Abstract:

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Among four AZ91 samples, two were once anodized and the others were twice anodized in two electrolytic baths. After twice anodization, two coatings coexist on the base metal. Surface morphology showed that for one of twice anodic coatings (sample 2), the second coating only existed on some places and sealed some pores of the first coating after short time on the second anodizing. However, for another twice anodic coating (namely sample 4), the second anodization spent very long time and the coating was thick and loose. Salt spray testing showed that sample 2 had the most excellent corrosion resistance and the reason is discussed.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

653-656

DOI:

10.4028/www.scientific.net/MSF.488-489.653

Citation:

R. F. Zhang et al., "Two-Step Anodization of AZ91 Magnesium Alloy", Materials Science Forum, Vols. 488-489, pp. 653-656, 2005

Online since:

July 2005

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Price:

$35.00

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