Zirconium-based Conversion Coating Agent

Winsir Zirconium-Based Conversion Coating Agent WST-TH is a water-based metal surface treatment. It is based on fluorozirconate chemistry and is weakly acidic. At room temperature, this zirconium-based conversion coating agent forms a nano-scale ceramic conversion film on clean metal surfaces. The film has excellent corrosion resistance and coating adhesion. It contains no heavy metals. It has stable performance and strong salt spray resistance. This zirconium-based conversion coating agent is the ideal replacement for phosphating solutions. It is the new generation of high-efficiency pre-treatment chemicals recommended for demanding environmental standards in Europe and America.

Winsir Zirconium-Based Conversion Coating Agent WST-TH is suitable for cold-rolled steel, galvanized steel, aluminum, and aluminum alloys. It works with various industrial coatings. It is especially suitable for powder coating pre-treatment. This zirconium-based conversion coating agent contains no COD or BOD. It has no heavy metals or phosphates. It is environmentally friendly. Waste liquid can be discharged directly. It produces no sludge and no gas during treatment. This minimizes sludge disposal costs and equipment wear. It works at room temperature and saves energy. No surface conditioner or accelerator is needed. Both immersion and spray methods work.

Winsir Zirconium-Based Conversion Coating Agent WST-TH follows a simple process. For cold-rolled and galvanized steel: degrease → water rinse → water rinse → conversion coat → water rinse → water rinse → drying. For hot-rolled steel: degrease → water rinse → acid pickling → water rinse → water rinse → conversion coat → water rinse → water rinse → drying. Treatment time is 1 to 3 minutes. Treatment temperature is room temperature. For bath preparation, clean the tank and add water to 60% capacity. Add 2% to 4% of this zirconium-based conversion coating agent and mix well. Maintain bath pH between 3.8 and 5.4.