Protochem Industries Pvt Ltd. Offers Zinc Phosphating Metal Treatment Chemicals. Protochem Industries Pvt Ltd. Is an ISO 9001 accredited company. Zinc Phosphating Metal Treatment Chemicals is used for light, medium and heavy zinc phosphate coating. Zinc Phosphating Metal Treatment Chemicals is trication type of chemicals. This chemical protects various metallic surfaces from corrosion due to exposure to air, moisture, excessive heat and extreme weather conditions. The surface coating products save various metallic products from rusting and decaying and help in improving their lifetime & durability.