Standard (As-Cast)
Zinc and aluminum zinc parts can be left as-cast and retain reasonable corrosion resistance. Aluminum parts must be coated to achieve corrosion resistance. Cast parts are typically broken away from the casting sprue, leaving rough marks at the gate locations. Most castings will also have visible marks left by the ejector pins. The surface finish for as-cast zinc alloys is commonly 16-64 microinch Ra.
Bead Blasted
The part surface is left with a smooth, matte appearance.
Anodized
Aluminum is typically anodized. Type II anodizing creates a corrosion-resistant oxide finish. Although suppliers can anodize parts in different colors, the surface of a die cast part does not facilitate a cosmetic finish with anodizing. Type III is a thicker finish and creates a wear-resistant layer in addition to the corrosion resistance seen with Type II. Anodized coatings are not electrically conductive.
Powder Coating
All die cast parts can be powder coated. This is a process where powdered paint is electrostatically sprayed onto a part, then baked in an oven. Powder coating creates a strong, wear- and corrosion-resistant layer that is more durable than standard wet painting methods. A wide variety of colors are available to create the desired aesthetic.
Wet Painting
All die cast parts can be wet painted in a wide variety of paint formulations and colors.
Plating
Die cast parts can be plated with electroless nickel, nickel, brass, tin, chrome, chromate, Teflon, silver and gold.
Chemical Film
Suppliers can apply a chromate conversion coat to protect aluminum from corrosion and improve the adhesion of paints and primers. Chemical film conversion coatings are electrically conductive.
Media Tumbled
Die cast materials are subjected to vibratory media tumbling to remove sharp edged and smooth surfaces.
Custom
Don’t see the finish you need? Submit an RFQ and we will look into a finishing process for you.
