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Sheet metal · Powder coat + plating + passivation

Sheet metal finishing — powder coat, plating, passivation.

Full RAL-range powder coating at 60–120 μm thickness. Chemical passivation for stainless steel. Zinc and nickel plating via partner facilities. Salt-spray testing on request. Most finishing is done in-house; specialty processes (hot-dip galvanize, anodize) handled through qualified local partners.

QUICK SPECS
Powder coat colorsFull RAL, custom Pantone match (+$150)
Coating thickness60–120 μm standard
Powder coat oven capacityParts up to 2m × 1m × 1.5m
Curing temperature180–200 °C
Salt-spray rating1,000+ hours (standard grade)
Lead time+3 days added to fabrication
STATUSIN OPERATION
§ 01 / SURFACE

Surface preparation — the critical step

The durability of any coating depends 80% on substrate preparation. Our finishing line:

01

Alkaline cleaning

Oil, cutting fluid, handling residue removed. 5-minute bath at 60 °C.

02

Rinse

Deionized water rinse, multiple stages for critical applications.

03

Phosphate conversion (carbon steel)

Iron or zinc phosphate crystalline layer promotes coating adhesion. Essential for corrosion performance.

04

Chromate conversion (aluminum)

Trivalent chromate (RoHS-compliant) or anodic prep for aluminum. Improves paint adhesion and corrosion base.

05

Dry

Oven dry before powder application — water droplets cause fisheye defects in powder coat.

§ 02 / FINISH

Finish options we offer

FinishTypical thicknessBest forLead time
Powder coat — smooth60–80 μmIndoor enclosures, appliance parts+3 days
Powder coat — texture80–120 μmOutdoor, industrial, scratch-hiding+3 days
Powder coat — matte / gloss60–100 μmCosmetic parts, consumer products+3 days
Passivation (stainless)n/a (chemical)Post-weld stainless, food-contact+1 day
Zinc plating8–25 μmLow-cost corrosion protection, hardware+5 days
Nickel plating15–50 μmWear resistance, EMI shielding+5 days
Brush / satinn/aStainless cosmetic (kitchen, architectural)+2 days
Hot-dip galvanize40–100 μmHeavy-duty outdoor (structural, fence)+7 days (partner)
§ 03 / FAQ

FAQ

Can I match a specific color like my brand?
Yes — send RAL code, Pantone, or physical sample. RAL matches are standard. Custom Pantone matches add $150 and 3 days to source powder.
Do you do salt-spray testing?
Yes — ASTM B117 salt spray on request. Standard test duration 500–1,000 hours. Report includes photos and time-to-first-corrosion. Small fee covers sample testing.
What about masking threads or datum surfaces?
Common. Holes, threads, mating surfaces masked with silicone plugs or high-temp tape. Specify masked features on drawing. Masking adds $0.50–$2 per feature.
Can I get certificates of compliance?
Yes — powder coat batch records, RoHS compliance letters, and REACH declarations available on request. Standard for aerospace and medical customers.
READY WHEN YOU ARE

Finished parts, one vendor, one invoice.

Fabrication + finishing handled in-house. Send your drawing with finish callout — we quote bare metal + coated prices side by side.

Start a quote →