Zinc-based Phosphating Agent

Winsir Zinc-Based Phosphating Agent WSB-2 is designed for galvanized sheet and zinc alloy sheet. It works at room temperature or with heating. This zinc-based phosphating agent forms a uniform film with very low sludge. It offers excellent adhesion, deformation resistance, and corrosion resistance. It is suitable for both spray and immersion pre-treatment before painting. It works well with powder coating, baking paint, and spray painting. Operation is easy and bath control is simple. This zinc-based phosphating agent is ideal for automotive and appliance industries where galvanized parts are common.

Winsir Zinc-Based Phosphating Agent WSB-2 comes as a complete system. The products include a phosphating opener, an opening additive, a phosphating agent, and an adjuster. The opening ratio is 8% to 12% phosphating opener with 0.5% opening additive. The phosphating agent is used for addition. The adjuster controls bath parameters. Treatment temperature is room temperature or heated. Treatment time is 4 to 8 minutes for immersion and 2 to 5 minutes for spray. Salt spray performance is excellent for both bare and coated panels. Total acidity for immersion is 18 to 30. Total acidity for spray is 16 to 25. Free acidity for immersion is 1.5 to 2.5. Free acidity for spray is 1.0 to 2.0.

Winsir Zinc-Based Phosphating Agent WSB-2 follows a standard process. The flow is degrease → water rinse → water rinse → surface conditioning → phosphating → water rinse → drying. Before phosphating, remove all oil and dirt from the metal surface. Use overflow rinsing for best results. Good surface conditioning refines crystals and accelerates film formation. For bath preparation, fill 2/3 with water. Add 60 to 100 L of phosphating opener per 1000 L and mix well. Reduce free acid to the working range. Add 5 L of opening additive. Fill to working level and mix well.