Key principles.
Mark on drawing
All finishes hang in tank — designate hanging point in non-cosmetic area.
Anodize / plating add
Anodize Type II 5-25 µm, Type III 25-75 µm. Plating 5-50 µm. Account in tolerance analysis.
For mating features
Internal threads, bearing bores must be masked. Specify on drawing or accept growth.
Internal cavities
Plating solution must drain. Add drain holes in cavities.
Vary by process
Anodize: degrease, etch, deoxidize. Powder coat: pretreatment + curing.
Lot variation
Color varies between lots. For color-critical, qualify color samples first.
FAQ
Aluminum: anodize Type II decorative or Type III hardcoat. Steel: zinc plating cheap, chrome wear, powder coat decorative.
Powder coat cheapest. Anodize Type II middle. Plating varies. PVD premium.
Anodize 3-5 days. Plating 2-3 days. Powder coat 2-4 days. Multi-step finishes longer.
Anodize + dye + sealing standard. Plating + secondary coating possible. Powder coat over phosphate standard.
Touch-up varies. Powder coat hard to spot-repair (visible). Anodize can re-anodize specific areas.
Customer specs honored. Material certs + processing records included with delivery.
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