Journal
PROGRESS IN ORGANIC COATINGS
Volume 115, Issue -, Pages 94-99Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2017.11.013
Keywords
ZIF-90 film; Protective coatings; Corrosion resistance; Hydrophobic; Electrochemical impedance spectroscopy
Funding
- Natural Science Foundation of Liaoning Province [2013020082]
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A zeolite imidazolate framework-90 (ZIF-90) film with corrosion resistance was prepared on the surface of Zn-Al alloy by solvent thermal synthesis method employing a thinking of twin zinc source. The crystal structure and morphology of the ZIF-90 film was confirmed by X-ray diffraction (XRD) and secondary electron microscopy (SEM), respectively. The properties of the film, adhesion and the hydrophobicity were tested by the method of cross-cut test and water contact angle measurement. The potentiodynamic polarization curves indicates that the existence of the film decreases the corrosion current density of the Zn-Al alloy, and the plots and appropriate equivalent circuit models calculated from the electrochemical impedance microscope (EIS) measurements reveals that the hydrophobic ZIF-90 surface considerably improves the corrosion resistant performance of Zn-Al alloy.
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