Abstract
Mg alloy was protected with Mg:Al layered double hydroxide (LDH) coating intercalated with three green corrosion inhibitors (sodium benzoate, 3-aminopropyltriethoxysilane and 8-hydroxyquinoline). The in-situ hydrothermal approach was adopted to intercalate corrosion inhibitors into Mg:Al LDH coating. The intercalated Mg:Al LDH coating was successfully acquired, and the crystalline structure of Mg:Al LDH coating was verified with X-ray diffraction (XRD). The organic functional groups of corrosion inhibitors were identified with the help of Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The compact and uniform morphology was confirmed by scanning electron microscopy (SEM). The electrochemical measurement revealed better corrosion resistance of corrosion inhibitor-intercalated Mg:Al LDH coatings as compared to that of pristine Mg alloy. The corrosion protection mechanism of corrosion inhibitors was described and unearthed the corrosion inhibitor with the best performance.
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This study was financially supported by the National Natural Science Foundation of China (No. 51471021).
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Anjum, M.J., Zhao, JM., Asl, V.Z. et al. Green corrosion inhibitors intercalated Mg:Al layered double hydroxide coatings to protect Mg alloy. Rare Met. 40, 2254–2265 (2021). https://doi.org/10.1007/s12598-020-01538-7
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DOI: https://doi.org/10.1007/s12598-020-01538-7