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Chromatizing Chemical, Yellow
Chromatizing Chemical, Yellow
Pradeep Metallurgical Products offers Unichrome C, a yellow chromatizing process, which is an excellent pre-treatment for aluminum and its alloys, by dip/spray processes. The treatment deposits a uniform, amorphous, rainbow brown, chromate conversion coating. The intensity and the coating thickness depends upon the immersion period, composition of the metals, etc. The chromate conversion coating offers excellent corrosion resistance (more than 100 hrs on a 5% sodium chloride salt-spray test), and an enhanced bonding with the paints/powder coatings/organic coatings deposited on the metal. The chromatized components are then oven dried/air-dried and painted preferably within 24 hours. In the case of aluminum alloys, it is recommended to give a 5 minutes dip in a 5% solution of activator solution for the removal of the oxide scales and the rust spots. Unichrome-C is used at a concentration of 2.5-5 percent W/V, for a dipping period of 5-10 min at room temperature. Periodic checking of TA/FA is recommended. Water rinsing and drying after chromatizing shall be done.