| 摘要 |
This invention is an abstraction method for chrome-plating a metal surface, especially zinc alloy. It is obtained from an acid chromating solution with hexavalent chromium, vitriolic, nitrate, chlorine, silicic and fluorine ions and with an organic substance of dicarbonic acid, whose temperature is 30-50 degrees C and which covers the metal for 10-30s.The results obtained by this chromating method have good protection, i.e. thermo- and corrosive resistance, and resistance from ultraviolet shaft irradiation. |
