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KOUBA, J. ZMRZLÝ, M. TKACZ, J. HADZIMA, B.
Original Title
Cerium-based conversion coatings for aluminium alloys
Type
conference paper
Language
English
Original Abstract
This work deals with growth of cerium-based conversion coatings on aluminium alloy AW 2024-T351. This paper is focused on influence of varying conditions (activation agens, temperature and immersion time) on final properties of obtained coating. The microstructure and chemical composition of the protective films have been examined by scanning electron microscopy (SEM). The level of corrosion protection was evaluated by the polarization resistance measurement in neutral 3.5 wt.% sodium chloride solution. The coating obtained by simply immersion in solution of Ce3+ salt covers surface of alloy with thin protective layer. The coating obtained from solution containing addition of hydrogen peroxide was thicker and it was formed by small (submicomteric) spherical particles. With increasing immersion time protective effect of obtained layer was increased. In oposite of published papers, coating obtained in bath containing hydrogen peroxide provided worse protection against corrosion.
Keywords
corrosion, aluminium alloys, conversion coatings, cerium
Authors
KOUBA, J.; ZMRZLÝ, M.; TKACZ, J.; HADZIMA, B.
RIV year
2012
Released
7. 12. 2012
Publisher
Vysoké učení technické v Brně, Fakulta chemická
Location
Brno
ISBN
978-80-214-4644-1
Book
Studentská konference Chemie je život 2012
Edition number
1
Pages from
334
Pages to
339
Pages count
6
BibTex
@inproceedings{BUT96804, author="Jan {Kouba} and Martin {Zmrzlý} and Jakub {Tkacz} and Branislav {Hadzima}", title="Cerium-based conversion coatings for aluminium alloys", booktitle="Studentská konference Chemie je život 2012", year="2012", number="1", pages="334--339", publisher="Vysoké učení technické v Brně, Fakulta chemická", address="Brno", isbn="978-80-214-4644-1" }