Adhesion and corrosion studies of a lithium based conversion coating film on the 2024 aluminum alloy

AA2024-T3-aluminum alloy surfaces were coated using non-chromate and chromate conversion coatings. All coatings were painted with the 10P4-2-primer epoxy resin. Independent on the film formation process, films passed on the substrate/conversion coating wet tape adhesion test. However, only the chrom...

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Bibliographic Details
Published in:Thin solid films 2004-06, Vol.457 (2), p.307-312
Main Authors: Castro, M.R.S., Nogueira, J.C., Thim, G.P., Oliveira, M.A.S.
Format: Article
Language:English
Subjects:
Adhesion
Aluminum
Chromate conversion coating
Corrosion
Non-chromate conversion coating
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Summary:AA2024-T3-aluminum alloy surfaces were coated using non-chromate and chromate conversion coatings. All coatings were painted with the 10P4-2-primer epoxy resin. Independent on the film formation process, films passed on the substrate/conversion coating wet tape adhesion test. However, only the chromate conversion coating passed on the conversion coating/primer epoxy resin adhesion test. Electrochemical corrosion measurements showed that non-chromate conversion coated surfaces present lower corrosion current density, bigger polarization resistance and less negative corrosion potential than chromate conversion coated surfaces.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2003.10.024