Zn-Al layered double hydroxides as chloride nanotraps in active protective coatings
authors Tedim, J; Kuznetsova, A; Salak, AN; Montemor, F; Snihirova, D; Pilz, M; Zheludkevich, ML; Ferreira, MGS
nationality International
journal CORROSION SCIENCE
author keywords Organic coatings; X-ray diffraction
keywords HYDROTALCITE-LIKE COMPOUNDS; CORROSION PROTECTION; FILIFORM CORROSION; COATED AA2024-T3; ALUMINUM-ALLOY; INHIBITOR; PIGMENTS; NANOCONTAINERS; RELEASE; ANIONS
abstract Zn-Al layered double hydroxides (LDHs) intercalated with nitrate anions are suggested as chloride nanotraps for organic polymeric coatings. The addition of such nanotraps to a polymer layer drastically reduces the permeability of corrosive chloride anions through the protective coatings. In solution, Zn(2)-Al-NO3 LDHs are responsive to the concentration of chlorides and the release of nitrates is accompanied by entrapment of chlorides, with the process governed by ion-exchange equilibrium. In particular, a coating modified with LDH-NO3 was found to exhibit significantly lower permeability to chlorides when compared to both unmodified and LDH-Cl-containing coatings, which proves the applicability of LDHs in delaying coating degradation and corrosion initiation. (C) 2011 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
year published 2012
volume 55
beginning page 1
ending page 4
digital object identifier (doi) 10.1016/j.corsci.2011.10.003
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000299758000001
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 4.862
5 year journal impact factor 5.238
category normalized journal impact factor percentile 90.667
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg