[Product Description]

Principle: Chromium free passivation agent is a new type of chromium free conversion film treatment agent, replacing the traditional chromium containing film process. It is based on organic polymers and zirconium titanium salts to generate a nanoscale resin ceramic film on the metal surface. It does not contain heavy metals, phosphates, and organic volatile components, and almost does not produce sediment during the film forming process. It is mainly used for processing metal parts such as zinc plating, aluminum zinc plating, and aluminum materials. It helps to improve the adhesion between the metal and the coating, enhancing the corrosion resistance of the coating.

[Performance characteristics]

1. Green and environmentally friendly, phosphate free, heavy metal free, small amount of chemical treatment, no sediment cleaning, simple wastewater treatment

2. Outstanding benefits, room temperature (no need for heating), short reaction time (30-90S), and lower construction cost of new lines

3. Excellent performance, strong coating adhesion, excellent reprocessing performance, high-pressure water boiling for 2 hours, 100 grid adhesion level 0, resistance to rapid impact deformation test, no peeling, bending test, no peeling

[Product Usage]

chemical

Chromium free passivation agent ZH-312

Slot allocation:

Slotting concentration: 0.5-2%, slotting pH range: 2.5-4.0, slotting conductivity range: 400-1500uS/cm

Before adding a large amount of ZH-312, the pH value of the distribution tank water was measured between 6-7, and the conductivity was below 300uS/cm.

Control points:

PH value: 2.5-4.5 Concentration: 0.5-2% Time: 30-120 S Temperature: Room temperature

Membrane weight

The total membrane weight of the conversion membrane is 30-130 mg/m2; The zirconium content in the membrane layer is 15-65 mg/m2

[Reference process]

Pre degreasing → main degreasing → water washing → water washing → chromium free passivation → water washing → water washing → drying