Format

Send to

Choose Destination
Dalton Trans. 2019 Jun 7. doi: 10.1039/c9dt01773a. [Epub ahead of print]

In situ growth of a CaAl-NO3--layered double hydroxide film directly on an aluminum alloy for corrosion resistance.

Author information

1
Department of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento, Italy. muhammadahsan.iqbal@unitn.it and Polymer Program, Institute of Materials Science and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, USA. luyi.sun@uconn.edu.
2
Polymer Program, Institute of Materials Science and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, USA. luyi.sun@uconn.edu.
3
Department of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento, Italy. muhammadahsan.iqbal@unitn.it.

Abstract

In this study, a calcium-aluminum-layered double hydroxide (CaAl-LDH) thin film was grown on an AA6082 aluminum alloy, for the very first time, by using a facile in situ growth method in an effort to investigate the CaAl-LDH structural geometry and corresponding corrosion resistance properties. The structure and surface morphologies of the CaAl-LDH thin film were studied using a scanning electron microscope (SEM) equipped with an EDS detector, a transmission electron microscope (TEM), an X-ray diffractometer (XRD), and a Fourier transform infrared spectrometer (FT-IR), while the electron impendence spectra (EIS) and potentiodynamic curves were recorded to understand the LDH anticorrosion behavior. The findings demonstrated that thin, well-developed CaAl-LDH coatings with different surface morphologies can be prepared with eminent corrosion resistance properties. Specifically, the CaAl-LDH thin film synthesized at 140 °C-24 h synthetic conditions showed a large impedance modulus of 7.3 Ω cm2 at 0.01 Hz (|Z|f = 0.01 Hz), along with a low corrosion current density (Icorr) of 0.0007 μA cm-2, while a vertically orientated rod like structure with a uniform surface morphology was observed.

PMID:
31173020
DOI:
10.1039/c9dt01773a

Supplemental Content

Full text links

Icon for Royal Society of Chemistry
Loading ...
Support Center