The yellow Zr salt conversion coating was prepared on the surface of aluminum alloy by adding additives into the solution with zirconium salt as main salt at room temperature. The surface morphology and composition of the conversion coating were studied by scanning electron microscope(SEM) and X-ray photoelectron spectrometer(XPS). The corrosion resistances of the coatings were researched by testing the polarization curves and electrochemical impedance spectroscopy of the conversion coating with electrochem...
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