Black steel plate is a kind of black steel plate, which has a coating film formed by coating a coating composition on the surface of a blackened Zn-Ni plated steel plate. The coating composition contains metal ions, water-soluble organic resin, water-dispersible Organic resins, glycoluril resins and acids [1]. Black steel plate is a thin, uncoated cold-rolled steel plate with high tensile strength and elongation. The United States is developing and using it to replace aluminum and plastic parts of some cars. This steel plate is generally no thicker than 0.142 inches (0.36 mm), has an elongation rate of up to 30%, and its high strength is generally developed in the forming process (hardening).
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