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A steady the black Zinc-Manganese electrolytic phosphate bath for carbon steel was obtained with an orthogonal trial. Electrochemical Impedance Spec-troscopy and Tafel Polarization curves were used to evaluate the corrosion resistance of phosphate coatings. scanning electron microscope (SEM) techniques were applied for crystal morphology of the electrolytic phosphate films, while the XRD method was...
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