Surface Finishing Services
Anodizing, sandblasting, plating, powder coating, passivation and black oxide for CNC machined parts — processed through our qualified partner network, then managed and inspected by Xinwinf before parts ship.
One Contact for Machining, Finishing and Inspection
Surface treatment is a specialist chemistry process, so we don’t run it in-house — we machine the parts and send them to a qualified partner network we have worked with over years. Xinwinf manages the schedule, follows each batch through, and brings every lot back for incoming inspection before packing.
- Qualified partner network — each finish goes to a specialist line, managed and inspected by Xinwinf
- One schedule — finishing is sequenced into the lead time you are quoted
- Incoming inspection on return — color, coating coverage and dimensions checked on our bench
- One contact — you don’t chase separate vendors for machining and finishing
Finishes We Regularly Coordinate
Color, coating type and finish notes can be specified on your drawing. Need something not listed? Ask — most common metal finishes are available through the partner network.
Anodizing
Hard, corrosion-resistant oxide layer on aluminum parts — black, silver and other colors for cosmetic housings and functional surfaces.
Sandblasting
Uniform matte texture on aluminum, steel and stainless parts, often combined with anodizing for appearance-grade components.
Plating — Nickel / Zinc / Chrome
Nickel, zinc and chrome plating on steel, stainless and brass parts for corrosion protection and wear-resistant surfaces.
Powder Coating
A tough colored polymer film for brackets, frames and outdoor parts, with good impact and weather resistance.
Passivation
Removes free iron from stainless steel after machining, restoring the material’s natural corrosion resistance.
Black Oxide
A thin black conversion coating on steel and copper parts — minimal dimensional change and an anti-glare surface.
Salt-Spray Testing and Incoming Inspection
Every finished batch comes back to our inspection bench before it ships. We check what the coating adds, what it changes, and whether it matches your drawing.
- Salt-spray tester in-house — corrosion performance verified on plated and coated parts when your spec requires
- 100% visual inspection — color, texture and coating coverage checked on every part
- Dimensions re-checked after finishing — coating thickness is accounted for against the drawing
- Failed lots go back — parts that don’t pass are returned to the partner, not shipped
Machined, Finished and Ready to Ship
Need a Specific Finish on Your Parts?
Note the finish and color on your drawing — or tell us the environment the part lives in. We’ll recommend the coating, quote it with machining, and inspect it before shipping.