Powder Coating Services
ZAK owns a 525-meter automated coating line, can do quality powder coating for your part after fabricated, we ensure the consistent color, verified adhesion, and meet the salt spray resistance requirement for your products.
Powder coating is ZAK’s core in-house surface finishing capability and the reason your fabricated or stamped parts can ship finished without leaving our Foshan facility. Unlike outsourced coating that adds transit time, handling risk, and a second vendor to manage, our integrated powder coating line sits within the same 66,000 m² campus as our stamping presses, laser cutters, and welding stations. Your parts move directly from fabrication to coating, same quality system, same team, same accountability, save your time and cost.
525 Meters of Automated Coating Capacity
A continuous-loop powder coating line, from chemical pre-treatment through curing.
→ rinse
The System
Gema Switzerland electrostatic spray guns deliver uniform powder coverage across flat panels, formed brackets, and deep-drawn enclosures. Manual touch-up stations follow the automated spray zone — operators target edges, recesses, and corners that automated guns can miss, ensuring complete coverage on complex geometries.
Capacity & Throughput
The line runs 1,050 hooks per cycle at adjustable speeds of 3.0–6.0 m/min, with hook spacing of 0.5 meters. That translates to 15,000 m² of coated surface per day and 4.68 million m² annually — enough throughput to handle your prototype runs and your high-volume production on the same system.
Maximum part size: 2,200 × 1,500 × 600mm — large enough for full-size HVAC panels, electrical enclosure bodies, and industrial equipment housings.
Integrated Pre-Treatment for Reliable Adhesion
Pre-treatment quality determines whether your coating holds up in the field or fails prematurely.
Our multi-stage chemical pre-treatment is built into the first zone of the 525-meter line.
Parts pass through degreasing, phosphating, and deionized water rinse stages before they reach the spray booth. By the time your parts are coated, the substrate is chemically clean, conversion-coated for adhesion, and free of contaminants that cause peeling, blistering, or premature corrosion.
Because pre-treatment and coating happen on the same continuous line, there’s no handling between stages — no fingerprints, no recontamination, no storage delay.
Powder Coating Performance Specifications
Here is our performance data and finish options for your reference and drawing specifications.
| Specification | Value |
|---|---|
| Coating Thickness | 60–120 μm (adjustable per application) |
| Salt Spray Resistance | Up to 1,000 hours (ASTM B117) |
| Color Accuracy | ΔE < 1.0 |
| Max Part Size | 2,200 × 1,500 × 600mm |
| Daily Capacity | 15,000 m² |
| Annual Capacity | 4.68 million m² |
| Substrate Compatibility | Carbon steel, stainless steel, aluminum, galvanized steel |
Coating Types & Finishes
Color Matching: We coat to any RAL, Pantone, or custom color specification. Color matching verified to ΔE < 1.0 with Konica Minolta CR-400 spectrophotometer. No catalog needed — specify your RAL code or provide a physical sample.
How We Control Coating Quality
Our QC team inspect every production batch with strict quality standard under ISO 9001 and IATF 16949, ensure the quality meet your requirements.
Color Consistency
Spectrophotometer verifies color against your approved standard
Film Thickness
Confirms coverage at multiple points per part per drawing spec
Surface Finish
Validates gloss units against your specification
Adhesion
ASTM D3359 confirms coating-to-substrate bond strength
Corrosion Resistance
ASTM B117 salt spray testing on production samples
Your quality team receives actual measurement data with every shipment — not just a certificate of conformance, but instrument readings tied to your specific order.
Powder Coated Parts We've Delivered
Below are some parts we finished recently for your reference.
Industries We Powder Coat For
Proven production programs across demanding industry verticals.
Electrical & Industrial
Switchgear enclosures, transformer housings, control boxes, cable trays.
Automotive & Mobility
Structural brackets, seat frames, underbody components, corrosion resistance and salt spray performance.
Consumer Products
Appliance panels, grill components, furniture frames, finish quality and UV stability.
HVAC & Refrigeration
Outdoor units, condenser panels, ductwork, coated for weather resistance and color retention.
Design Tips for Powder-Coated Parts
Smart design choices improve coating adhesion, finish quality, and cost efficiency.
Avoid Sharp Edges
Powder thins at sharp edges, reducing protection. Specify a minimum 0.5mm edge radius for reliable coverage.
Design Hanging Points
Every part needs a hook point on the line. Include a hole, tab, or feature that accepts a hook without affecting fit.
Include Drain Holes
Pre-treatment chemicals need to flow off. Closed sections without drain holes trap liquid and cause curing defects.
Specify Masking Areas
Threads, mating surfaces, and electrical contacts need to stay uncoated. Call them out on your drawing.
Powder Coating FAQs
Common questions from procurement managers and design engineers evaluating our powder coating.
What is the maximum part size you can powder coat?
Our line accommodates parts up to 2,200 × 1,500 × 600mm, it is large enough for full-size HVAC panels, electrical enclosure bodies, and industrial equipment housings. If your part exceeds this envelope, contact our engineering team to discuss alternatives.
What salt spray resistance can your powder coating achieve?
Our salt spray resistance can be up to 1,000 hours per your requirements, depending on substrate material, pre-treatment, and powder chemistry. We validate with in-house salt spray testing on production samples and provide documentation with your shipment.
Can you match a specific RAL or Pantone color?
Yes. Specify your RAL code, Pantone reference, or provide a physical sample. We verify every production batch to ΔE < 1.0 using a Konica Minolta CR-400 spectrophotometer — so part 10,000 matches part 1.
What pre-treatment process do you use?
We use multi-stage chemical pre-treatment integrated into the coating line: degreasing, phosphating, and deionized water rinse. No handling between stages, no recontamination risk.
Do you offer finishes beyond standard smooth gloss?
Yes, we can do gloss, semi-gloss, matte, satin, textured, wrinkle, and metallic finishes in polyester, epoxy, hybrid, and polyurethane chemistries. Your specification drives the selection.
Can you powder coat parts fabricated by another supplier?
Our line is primarily integrated with our own fabrication and stamping operations for best quality and lead times. For standalone coating inquiries, contact our team to discuss requirements and volumes.
How do you ensure color consistency across large production runs?
At ZAK, we do instrument-verified QC on every batch: spectrophotometer for color, thickness gauge for film build, gloss meter for finish. Your quality team receives actual measurement data, not just a certificate of conformance.
What is the typical lead time for powder-coated parts?
Because coating happens in-house, it typically adds 1–2 days to your fabrication lead time rather than the 5–7 days of outsourced coating. Contact us with your drawing for an accurate timeline.
Related Capabilities
Surface Finishing
Full range of finishing options including plating, anodizing, and polishing.
Get Your Parts Coated Right
Whether you need a prototype run or 100,000 production parts, our engineering team will recommend the right powder chemistry, finish, and color for your application.