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.

1. ZNP-54 ZINC PHOSPHATING CHEMICAL 2. Generally zinc phosphate conversion coating is used to provide long lasting corrosion protection. Almost all automotive industries use this type of conversion coating. It is suitable for the products come against hard weather conditions. Coating quality is better than iron phosphate coating. It forms 2 - 5 gr/m² coating on the metal surface when used as under paint. Application, set up and control of this process are more difficult than other methods and can be applied by immersion or spray. 3. Organic compounds like nickel and manganese are added to the bath to increase the coating performance. Also activation can be used to form small phosphate crystals on the metal surface before zinc phosphating. 4. Zinc phosphate reaction happens in amorphous shape with gray - black color. 5. pH optimizers are added to accelerate the reaction. Temperature, application time, concentration, pH, total acid and free acid values are the parameters which must be under control. 6. Zinc phosphates, coating range between 7 - 15 gr/m², are used in wire drawing, tube drawing and cold forming industries. Phosphated metal workpieces are prepared to the next stage by application of protective lubricans and soap

Base : Phosphoric Acid Base Chemical.Solubility : Thoroughly soluble in water.Color : Water White.Concentration : One part of chemical is diluted with two to four parts of water DilutionIs depended by the amount of oil present. The chemical is used cold.Point : Concentrated of 25 % bath solution gives 8 to 10 ml.Application : This chemical is used whenever parts contain light grease and OIL.

Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. Color : Water White. Concentration : One part of chemical is diluted with two to four parts of water. Dilution Is depended by the amount of oil present. The chemical is used cold. Point : Concentrated of 25 % bath solution gives 8 to 10 ml. Application : This chemical is used whenever parts contain light grease and OIL.

TMT BAR RUST REMOVER Derusting chemical removes rust & carbon from metal & cleans metal surface. Ensure that oxide scales & rust formation is removed. This chemical used whenever parts contains heavy rust and light oil. Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. Color : Colourless . Concentration : One part of chemical is diluted with three parts of water. Dilution depends by the amount of rust present. The chemical is used cold. Point : Concentrated of 25 % bath Solution gives 20 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.

Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. Color : Water White. Concentration : One part of chemical is diluted with two to four parts of water. Dilution Is depended by the amount of oil present. The chemical is used cold. Point : Concentrated of 25 % bath solution gives 8 to 10 ml. Application : This chemical is used whenever parts contain light grease and OIL.

Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. Color : Water White. Concentration : One part of chemical is diluted with two to four parts of water. Dilution Is depended by the amount of oil present. The chemical is used cold. Point : Concentrated of 25 % bath solution gives 8 to 10 ml. Application : This chemical is used whenever parts contain light grease and OIL. Bath Design : Tank make up5mm thick. M.S. tank with rubber or F.R.P. lining. For Small components PVC tank can be used as free grease floats on the surface. Generally tank design is made with large surface areas consideration. Lifting tackles are preferably used for handling material. A bottom outlet with get valve is provided 6’’ above the bottom outlet so that impurities do not disperse in the total solution. A water inlet is provided at the top.

ZNP-54 ZINC PHOSPHATING CHEMICAL Generally zinc phosphate conversion coating is used to provide long lasting corrosion protection. Almost all automotive industries use this type of conversion coating. It is suitable for the products come against hard weather conditions. Coating quality is better than iron phosphate coating. It forms 2 - 5 gr/m coating on the metal surface when used as under paint. Application, set up and control of this process are more difficult than other methods and can be applied by immersion or spray. Organic compounds like nickel and manganese are added to the bath to increase the coating performance. Also activation can be used to form small phosphate crystals on the metal surface before zinc phosphating. Zinc phosphate reaction happens in amorphous shape with gray - black color. pH optimizers are added to accelerate the reaction. Temperature, application time, concentration, pH, total acid and free acid values are the parameters which must be under control. Zinc phosphates, coating range between 7 - 15 gr/m, are used in wire drawing, tube drawing and cold forming industries. Phosphated metal workpieces are prepared to the next stage by application of protective lubricans and soap

Degreasing Chemical used whenever parts contains heavy grease, oil & light rust. This chemical also removes certain part of carbon. Base : Phosphoric Acid Base Chemical. Solubility : Thoroughly soluble in water. Color : Milky White 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 % bath Solution gives 15 to 17 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 : 35 Kgs. In PVC container. Yield Frequency : 250 - 300 Sq. Ft. per liter.