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