Supplier's Category: All Surface Treatment & Finishing: Anodizing, powder coating, and plating
Surface treatment and finishing applies coatings and surface conversions — anodizing, powder coating, plating — to protect a part from corrosion and wear or to give it a specific appearance. It’s typically the last process a metal part goes through before assembly or shipment.
Finishing is almost always the final step, applied after all machining, forming, and welding is complete, since most coatings can’t survive a subsequent cutting or bending operation.
- Anodizing: corrosion resistance and color on aluminum, doesn’t add significant thickness
- Powder coating: durable, thick color coating on a wide range of metals
- Plating: functional properties (conductivity, wear resistance, corrosion protection) or decorative finish
Related terms: anodizing (Type II, Type III hardcoat), powder coating, electroplating, electroless nickel plating, passivation, chromate conversion coating, PVD coating, masking for selective finishing, salt spray testing (corrosion resistance)
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What to check with a finishing supplier
Finish quality depends on pre-treatment cleaning as much as the coating step itself.
Questions to ask
- What pre-treatment and cleaning process do they use before coating
- Can they provide coating thickness measurement and adhesion test results
- Do they support masking for parts needing selective (partial) finishing