OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Nucleation and growth mechanisms of trivalent chromium conversion coatings on 2024-T3 aluminium alloy

Verdalet-Guardiola, Xavier and Fori, Benoit and Bonino, Jean-Pierre and Duluard, Sandrine Nathalie and Blanc, Christine Nucleation and growth mechanisms of trivalent chromium conversion coatings on 2024-T3 aluminium alloy. (2019) Corrosion Science, 155. 109-120. ISSN 0010-938X

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
4MB

Official URL: https://doi.org/10.1016/j.corsci.2019.04.035

Abstract

Nucleation and growth mechanisms of trivalent chromium conversion coatings on 2024 aluminium alloy (AA 2024) were studied. Nucleation of 25 nm diameter nodules was observed on the ridges of the scalloped structure of degreased and desmutted AA 2024 after very short time of conversion treatment corresponding to the formation of a 12 nm thick precursor layer. Then, the composition of this layer evolved and concomitantly a chromium and zirconium outer layer deposited on top of it. Rather long-lasting anticorrosive properties were measured even for conversion coatings formed after short exposure to the conversion bath, except for the precursor layer.

Item Type:Article
HAL Id:hal-02436678
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > MECAPROTEC Industries (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Statistics:download
Deposited On:13 Jan 2020 10:57

Repository Staff Only: item control page