|
authors |
Carneiro, J; Tedim, J; Fernandes, SCM; Freire, CSR; Silvestre, AJD; Gandini, A; Ferreira, MGS; Zheludkevich, ML |
|
nationality |
International |
|
journal |
PROGRESS IN ORGANIC COATINGS |
|
author keywords |
Cerium (III); Chitosan; Corrosion protection; Self-healing; AA2024 |
|
keywords |
CHITIN; DEPOSITION |
|
abstract |
The good film forming ability, specific solubility and versatile chemical functionalization of chitosan make it a promising candidate for "green" protective coatings. In the present work, these features are exploited together with chitosan high complexing ability to obtain inhibitor-containing anticorrosion coatings for active protection of aluminum alloys. The functionalization of chitosan with fluorinated substituents was also evaluated as a possible route to improve barrier and surface properties of the coating matrix. It was observed that the chitosan layer worked as a reservoir for cationic Ce3+ corrosion inhibitor due to the complexation of Ce3+ with chitosan amino groups, which prevents its uncontrollable and fast leaching. These Ce-containing coatings were found to confer active corrosion protection toward aluminum alloy 2024 as shown by electrochemical impedance spectroscopy. Moreover, the corrosion tests evidence the self-healing ability of prepared chitosan-based "green" protective coatings. The interaction between Ce3+ and chitosan and the concentration effect of the former on the performance of the latter from a corrosion standpoint is also discussed. (C) 2012 Elsevier B.V. All rights reserved. |
|
publisher |
ELSEVIER SCIENCE SA |
|
issn |
0300-9440 |
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year published |
2012 |
|
volume |
75 |
|
issue |
1-2 |
|
beginning page |
8 |
|
ending page |
13 |
|
digital object identifier (doi) |
10.1016/j.porgcoat.2012.02.012 |
|
web of science category |
Chemistry, Applied; Materials Science, Coatings & Films |
|
subject category |
Chemistry; Materials Science |
|
unique article identifier |
WOS:000305878300002
|
