Professional Zinc Alloy Surface Finishing Solutions
Tratamiento Posterior para Recubrimiento en Soporte
Post-treatment for rack plating
1.Boosts corrosion resistance of plating layer 2.Enhances surface decorative effect 3.Removes plating residual impurities 4.Improves plating physical & chemical properties 5.Ensures plating adhesion and overall stability
1. Process Flow Chart
2. Process Video
3. Process Details
1. Post-processing Automatic Waterline
Post-processing Automatic Waterline (double-hanger, with 9 tanks + hanging & unhanging Hanging → Cleaning Tank → Electrolytic Protection Tank → Electrolytic Protection Tank →2 times Cleaning Tank → Ultrasonic Water Removal Tank → 3 times Cleaning Tank → Unhanging
2-1. Electrophoresis Tank
1.Function of photoelectrophoresis tank: Form uniform compact transparent coating on workpieces, improve corrosion/scratch/weather resistance, enhance surface gloss & texture, protect base plating/electrophoresis layer.2.Either Electrophoresis Tank or Clear Protective Coating Spraying
2-1-1. Recycling Tank
Pre-rinsing in recovery tank.
2.1-2. Three times Cleaning Tank
Remove residual liquid on the workpiece surface.
2-2. Spray transparent protective paint
1.Functions of clear protective coating spraying: Enhance protection and gloss of the coated surface. 2.Either Electrophoresis Tank or Clear Protective Coating Spraying
3. Oven
4. Quality inspection
5. Packaging
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Workshop Planning Data
Post-treatment for rack plating — Data Zinc Alloy Finishing Managers Need
Post-treatment dries, passivates, lacquers and bakes plated zinc alloy parts to lock in the finish, boost salt-spray hours and protect surfaces during transport and assembly.
300 m²Workshop Area
12 peopleTeam Size
110 kWInstalled Power
800k-1.6M pcs/dayDaily Output (10 h)
Quality Inspection & Control
| Check item | Method | Acceptance standard |
|---|---|---|
| Passivation quality | Visual + salt spray | Colorless/blue/yellow passivation per spec |
| Lacquer coverage | UV inspection | 100% coverage, no bare spots |
| Bake cure | MEK rub test / oven log | No softening; cure at 120-160 °C per data sheet |
| Adhesion after bake | Cross-cut | ISO 2409 rating 0-1 |
| Color shift | Colorimeter | ΔE ≤ 1.0 after lacquer vs before |
| Salt spray retention | NSS chamber | Meets or exceeds un-lacquered hours |
Workshop Layout & Floor Area
| Zone | Area |
|---|---|
| Passivation & rinse line | 80 m² |
| Lacquering / dipping line | 70 m² |
| Baking ovens | 50 m² |
| Sorting & packaging | 50 m² |
| QA & chemical store | 25 m² |
| Utility & lockers | 25 m² |
| Total workshop | 300 m² |
Manpower & Shift Plan
| Role | Headcount |
|---|---|
| Line operators | 7 |
| QC inspectors | 2 |
| Chemical technician | 1 |
| Supervisor | 1 |
| Maintenance | 1 |
| Total (2 shifts × 10 h) | 12 |
Power & Utility Demand
| Equipment | Demand |
|---|---|
| Passivation tank heating | 20 kW |
| Dip / spray lacquer booth | 12 kW |
| Baking ovens (2) | 45 kW |
| Pumps / dosing | 9 kW |
| Exhaust | 8 kW |
| Sorting conveyor + lighting | 16 kW |
| Installed total | 110 kW |
| Typical running load | ≈ 88 kW |
Production Flow Chart
Receive Plated PartsBatch from plating line
PassivationChromate / trivalent seal
Rinse & DryDI rinse, hot-air dry
Lacquer / DipImmersion or spray lacquer
Bake / CureTunnel or batch oven
Sort / Inspect / PackAQL sampling, export packing
Daily Capacity — 10-Hour Operating Day
| Parameter | Value |
|---|---|
| Cycle time | 15-30 min |
| Load per batch | 100-200 kg |
| Batches per 10 h day | 18-24 |
| Daily output | 800,000-1,600,000 pcs |
| Monthly output (26 days) | 20-41 million pcs |
Output Value Estimate
| Parameter | Value |
|---|---|
| Processing fee per piece | USD 0.002-0.006 |
| Daily output value (10 h) | USD 2,000-6,000 |
| Monthly output value | USD 52,000-156,000 |
| Annual output value | USD 620,000-1,870,000 |
Related Products — Complete Post-treatment for rack plating Solution
Machines, chemicals and consumables selected from the real QLQ product range for this process. Every product page is live and ready to quote.
Anti-rust Powde
Equipment & Spare Part
Coloring Powder
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QLQ-L55 Lacquer (for slider)
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QLQ-L20A Lacquer A (for metal zipper)
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QLQ-L20B Lacquer B (for metal zipper)
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QLQ-L40A Lacquer A (for metal zipper)
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QLQ-L40B Lacquer B (for metal zipper)
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