CHROMATIZING Aluminium chromate and its applications What we call as phosphating to steel an iron is called chromating for aluminium surfaces. Also it is knows as alodine coating. There are yellow, green and transparent chromating types. Yellow chromate coats Cr+6, green chromate coats Cr+3. Coating weight can vary according to application time and coating type. Drying temperature must not pass over 65 º C for yellow chromate and 85 º C for green and transparent chromate coatings. It is importat to provide clean, grease free surface before chromate application. If hot degreasing bath is prepared, caustic bath and following nitric acid bath can be used for pickling. On the other hand, acidic degreasing baths have pickling ability with itselves. Chromating and paint adhesion will be much better on pickled and degreased aluminium surface.

CORODG-27 DEGREASING + DERUSTING used whenever parts contains heavy grease, oil & rust. This chemical also removes certain part of carbon. Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. . Color : Yellow Concentration : One part of chemical is diluted with three parts of water. Dilution depends by the amount of oil present. The chemical is used cold. Point : Concentrated of 25 % - 33 ºth Solution gives 20 ml to 22 ml. Point. Bath Design : Tank is made up of 10mm thick. M.S. tank with F.R.P. Vinyl coat of F.R.P. Lining works will be the most suitable or sustainable design of tank. Packing : 40 Kgs. In PVC container. Yield Frequency : 250 - 300 Sq. Ft. per liter.