PEO Coatings with Active Protection Based on In-Situ Formed LDH-Nanocontainers
authors Serdechnova, M; Mohedano, M; Kuznetsov, B; Mendis, CL; Starykevich, M; Karpushenkov, S; Tedim, J; Ferreira, MGS; Blawert, C; Zheludkevich, ML
nationality International
journal JOURNAL OF THE ELECTROCHEMICAL SOCIETY
keywords PLASMA ELECTROLYTIC OXIDATION; LAYERED DOUBLE HYDROXIDES; ALUMINUM-ALLOY; CORROSION PROTECTION; CERAMIC COATINGS; ORGANIC COATINGS; HYDROTALCITE; INHIBITION; INTERCALATION; PARAMETERS
abstract In the present work, for the first time Zn-Al layered double hydroxide (LDH) nanocontainers were grown in-situ on the surface and in the pores of plasma electrolytic oxidation (PEO) layer and then loaded with a corrosion inhibitor to provide active protection. The developed LDH-based conversion process ensures partial sealing of the pores and provides an effective corrosion inhibition on demand leading to increased fault-tolerance and self-healing properties. The structure, morphology and composition of the LDH-sealed PEO coatings on 2024 aluminum alloy were investigated using SEM, TEM/FIB, XRD and GDOES. Electrochemical impedance spectroscopy and scanning vibrating electrode techniques show a remarkable increase in the corrosion resistance and fault tolerance when PEO coating is sealed with a LDH-inhibitor treatment. (C) The Author(s) 2016. Published by ECS. All rights reserved.
publisher ELECTROCHEMICAL SOC INC
issn 0013-4651
isbn 1945-7111
year published 2017
volume 164
issue 2
beginning page C36
ending page C45
digital object identifier (doi) 10.1149/2.0301702jes
web of science category Electrochemistry; Materials Science, Coatings & Films
subject category Electrochemistry; Materials Science
unique article identifier WOS:000397850800019
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  impact metrics
journal impact factor (jcr 2016): 3.259
5 year journal impact factor (jcr 2016): 3.307
category normalized journal impact factor percentile (jcr 2016): 81.397
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