Sealing of tartaric sulfuric (TSA) anodized AA2024 with nanostructured LDH layers
authors Kuznetsov, B; Serdechnova, M; Tedim, J; Starykevich, M; Kallip, S; Oliveira, MP; Hack, T; Nixon, S; Ferreira, MGS; Zheludkevich, ML
nationality International
journal RSC ADVANCES
keywords ACTIVE CORROSION PROTECTION; DOUBLE HYDROXIDE FILM; T3 ALUMINUM-ALLOY; SOL-GEL COATINGS; ORGANIC COATINGS; BEHAVIOR; ACID; INHIBITION; NANOCONTAINERS; HYDROTALCITE
abstract In this work, a functional sealing of a TSA anodic layer on AA2024 is suggested based upon the formation of inhibitor-containing Zn-Al layered double hydroxides (LDH). The LDH structures are formed in the pores of the anodic layer and on top of it as a result of hydrothermal treatment in a Zn2+-containing bath as shown by the structure, morphology and composition analysis. The resulting LDHs were loaded with a well-known corrosion inhibitor (vanadate). Electrochemical impedance spectroscopy, salt spray tests and scanning vibrating electrode techniques have shown a remarkable improvement in corrosion resistance of the LDH-modified sample in comparison with conventional hot-water sealing. The vanadate-loaded LDHs rendered a significant long-term active protection for the covered aluminum alloy substrate.
publisher ROYAL SOC CHEMISTRY
issn 2046-2069
year published 2016
volume 6
issue 17
beginning page 13942
ending page 13952
digital object identifier (doi) 10.1039/c5ra27286f
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000369639400042
  ciceco authors
  impact metrics
times cited (wos core): 8
journal impact factor (jcr 2016): 3.108
5 year journal impact factor (jcr 2016): 3.257
category normalized journal impact factor percentile (jcr 2016): 64.759
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