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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 5/2008

01.10.2008

Effect of Micro Arc Oxidation Coatings on Corrosion Resistance of 6061-Al Alloy

verfasst von: Nitin P. Wasekar, A. Jyothirmayi, L. Rama Krishna, G. Sundararajan

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 5/2008

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Abstract

In the present study, the corrosion behavior of micro arc oxidation (MAO) coatings deposited at two current densities on 6061-Al alloy has been investigated. Corrosion in particular, simple immersion, and potentiodynamic polarization tests have been carried out in 3.5% NaCl in order to evaluate the corrosion resistance of MAO coatings. The long duration (up to 600 h) immersion tests of coated samples illustrated negligible change in weight as compared to uncoated alloy. The anodic polarization curves were found to exhibit substantially lower corrosion current and more positive corrosion potential for MAO-coated specimens as compared to the uncoated alloy. The electrochemical response was also compared with SS-316 and the hard anodized coatings. The results indicate that the overall corrosion resistance of the MAO coatings is significantly superior as compared to SS316 and comparable to hard anodized coating deposited on 6061 Al alloy.
Vorheriger Artikel Embrittlement of a Duplex Stainless Steel in Acidic Environment Under Applied Cathodic Potentials
Nächster Artikel Over-Aging Effect on Fracture Toughness of Beryllium Copper Alloy C17200

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Metadaten
Titel
Effect of Micro Arc Oxidation Coatings on Corrosion Resistance of 6061-Al Alloy
verfasst von
Nitin P. Wasekar
A. Jyothirmayi
L. Rama Krishna
G. Sundararajan
Publikationsdatum
01.10.2008
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 5/2008
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-008-9222-8

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