| 摘要 |
A Cr-free sealing solution and a method of fabricating a phosphate electro-galvanized steel sheet using the same are provided to form a sealing resin on the top of a phosphate layer using Cr-free sealing solution containing inorganic compound like silane and zirconium, thereby improving the anti-corrosion and anti-black staining properties. A Cr-free sealing solution including pure water comprises an inorganic cross-linking agent formed of zirconium-based compound 0.2~9wt.%, a silane coupling agent formed of amino, epoxy or methacryl 0.1~3wt.%, and phosphoric acid inorganic matter 0.3~15wt.%. The inorganic cross-linking agent is selected among zirconia, zirconium hydro fluoric acid, zirconium potassium fluoride, zirconium ammonium fluoride, and zirconium compound sol.
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