Layered double hydroxide based active corrosion protective sealing of plasma electrolytic oxidation/sol-gel composite coating on AA2024
authors Bouali, AC; Straumal, EA; Serdechnova, M; Wielan, DCF; Starykevich, M; Blawert, C; Hammel, JU; Lermontov, SA; Ferreira, MGS; Zheludkevich, ML
nationality International
journal APPLIED SURFACE SCIENCE
author keywords Plasma electrolytic oxidation; Xerogel; Layered double hydroxide; Corrosion protection
keywords PEO-COATINGS; ALUMINUM; ALLOY; RESISTANCE; MG; PHOSPHATE; AEROGELS; OXIDE; FILM; SILICATE
abstract This work reports a novel approach for growing layered double hydroxide (LDH) films on any plasma electrolytic oxidation (PEO) coated AA2024 independently of the nature of the PEO coating. The specific PEO coating chosen to carry out this work is considered to be not suitable for direct LDH growth because of phase composition and morphological features. In this paper, we describe a new methodology that consists of covering the PEO coating with a thin layer of aluminum oxide based xerogel as the source of aluminate ions for subsequent in-situ LDH growth. X-ray diffraction (XRD) and scanning electron microscope (SEM) images showed a successful formation of LDHs on the surface. An improvement in terms of active corrosion protection was also demonstrated by electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET).
publisher ELSEVIER
issn 0169-4332
isbn 1873-5584
year published 2019
volume 494
beginning page 829
ending page 840
digital object identifier (doi) 10.1016/j.apsusc.2019.07.117
web of science category Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
subject category Chemistry; Materials Science; Physics
unique article identifier WOS:000487838900093
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journal analysis (jcr 2019):
journal impact factor 6.182
5 year journal impact factor 5.141
category normalized journal impact factor percentile 83.386
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