A novel bilayer system comprising LDH conversion layer and sol-gel coating for active corrosion protection of AA2024
authors Yasakau, KA; Kuznetsova, A; Kallip, S; Starykevich, M; Tedim, J; Ferreira, MGS; Zheludkevich, ML
nationality International
journal CORROSION SCIENCE
author keywords Active corrosion protection; Layered double hydroxides; Sol-gel coatings; Vanadate inhibitor; Self-healing
keywords ALUMINUM-ALLOY 2024-T3; PURE ALUMINUM; ANODIC-DISSOLUTION; ANION-EXCHANGE; INHIBITION; CHROMATE; FILMS; PERFORMANCE; VANADATE; CERIUM
abstract In this work active corrosion protection of AA2024 by a bilayer system consisting of a LDH (layered double hydroxides) conversion layer coated by a sol-gel film was studied. Impedance and Scanning vibrating electrode technique (SVET) studies demonstrated an efficient active corrosion protection and self-healing abilities of the systems containing LDH layer loaded with vanadate corrosion inhibitor. Microstructural and chemical analysis of the surface after corrosion testing showed accumulation of chlorine signal in LDH coatings. The scavenging of chlorides and release of vanadate inhibitor from LDH can explain high efficiency of corrosion inhibition of AA2024 by the novel protective system.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
year published 2018
volume 143
beginning page 299
ending page 313
digital object identifier (doi) 10.1016/j.corsci.2018.08.039
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000447570500030

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