Influence of inhibitor addition on the corrosion protection performance of sol-gel coatings on AA2024
authors Yasakau, KA; Zheludkevich, ML; Karavai, OV; Ferreira, MGS
nationality International
journal PROGRESS IN ORGANIC COATINGS
author keywords Corrosion inhibitor; Self-healing; Sol-gel; Aluminum alloy; SVET; EIS
keywords CHROMATE CONVERSION COATINGS; ALUMINUM 2024-T3; ALLOYS; COPPER; 8-HYDROXYQUINOLINE; NANOCONTAINERS; AIRCRAFT; FILMS
abstract Sol-gel films are actively investigated during the last decade as possible candidates for environmentally friendly pre-treatments. However, the important drawback in this case is the lack of active corrosion protection and self-healing ability. In this work a certain number of corrosion inhibitors for AA2024 was used as additives to the hybrid sol-gel formulations in order to confer active corrosion protection without damaging the coating. The 8-hydroxyquinoline, benzotriazole and cerium nitrate were added at different stages of the synthesis process to understand the role of possible interaction of the inhibitor with components of the sol-gel system. The Scanning Vibrating Electrode Technique and Electrochemical Impedance Spectroscopy were employed as two main techniques to characterize the corrosion protection performance of the hybrid sol-gel films doped with inhibitors and to understand the mechanisms of corrosion protection. The results demonstrate that 8-hydroxyquinoline and cerium nitrate do not affect the stability of sol-gel films and confer additional active corrosion protection effect. In contrast to this, benzotriazole leads to deterioration of the corrosion protection properties of hybrid sol-gel films. (C) 2008 Published by Elsevier B.V.
publisher ELSEVIER SCIENCE SA
issn 0300-9440
year published 2008
volume 63
issue 3
beginning page 352
ending page 361
digital object identifier (doi) 10.1016/j.porgcoat.2007.12.002
web of science category Chemistry, Applied; Materials Science, Coatings & Films
subject category Chemistry; Materials Science
unique article identifier WOS:000260717200015
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journal impact factor (jcr 2016): 2.858
5 year journal impact factor (jcr 2016): 2.903
category normalized journal impact factor percentile (jcr 2016): 83.352
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