Zinc phosphating chemicals [uniphos-cs] are used for process of room temperature on sheet metal components and offers prolonged protection against corrosion. Coating weight is generally of the order of 150 to 300 mg/ft. These zinc phosphate coatings conform to the requirements of is:3618/is:6005. They are very smooth, micro-crystalline and compact in nature. Has grain refining agents and are pale greenish in colour, with clear viscous liquid, having special grade of 1.30 used at a concentration of 6 to 8 per cent vol/vol. Dipping time of 15 to 30 minute and ta 28 to 32 points, fa 1.5 to 4.0 accelerators to obe used is additive-cp.
