In situ growth of a CaAl-NO3--layered double hydroxide film directly on an aluminum alloy for corrosion resistance
| Autor: | Hao Ding, Muhammad Ahsan Iqbal, Anna Marie LaChance, Michele Fedel, Luyi Sun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
corrosion resistance Scanning electron microscope CaAl-LDH thin film Alloy in situ growth Infrared spectroscopy in situ growth CaAl-LDH thin film aluminum alloy corrosion resistance engineering.material Corrosion Inorganic Chemistry chemistry.chemical_compound chemistry Transmission electron microscopy engineering Hydroxide Thin film Composite material aluminum alloy Diffractometer |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|