PHOSPHOR-FREE, ECO-FRIENDLY ZIRCONIUM COATING AGENT ALLOWING FOR USE OF INDUSTRIAL WATER AND METHOD OF USING THE SAME

摘要

The present invention relates to an implementation of a zirconium coating agent allowing industrial water or tab water to be used in a zirconium coating process or in a rinsing process right prior to the zirconium coating process. The zirconium coating agent contains an organic functional group (O.F.G) that aids in coating by preventing calcium ions (Ca2+) in the industrial water from bonding with fluorine ions (F−) in a conventional zirconium coating agent while leaving them free ions. The zirconium coating agent also contains calcium ions (Ca2+) that may provide anti-rust properties. The zirconium coating agent is phosphor-free. Accordingly, according to the present invention, use of the zirconium coating agent may meet the painting quality required in automobile industry and allows for accelerated zirconium coating (15 seconds to two minutes) together with simultaneous chemical conversion for various metals (steel, zinc, and aluminum).

主权项

1. A phosphor-free, eco-friendly zirconium coating agent allowing use of industrial water, the zirconium coating agent composed by adding, to a conventional zirconium coating agent essentially containing fluorine ions (F−), a material having a bonding force larger than calcium fluoride (CaF) and preventing a material dissolved in water from bonding with calcium fluoride (CaF) to thus allow industrial water or tab water with a calcium ion (Ca2+) content up to 75 mg/l and an electric conductivity of 100 to 300 μs/cm to be used in a zirconium coating process or a rinsing process prior to the zirconium coating process.