Coating Specifications by Substrate

zinc plated parts

Aluminum Substrate

Coating/ProcessDescription
Chem. Film (Iridite)Chem. Film or Iridite is primarily used for mild corrosion protection with low electrical resistance and also improves paint adhesion on aluminum and aluminum alloys. ASTM B 449
Black Polyurethane E-CoatBlack Polyurethane E-Coat is applied with an electrical current in an immersion process that results in a very uniform coating, even on complex parts. The thickness (0.2 to 1.0 mil) is lower than liquid paints or powder coat, making it ideal for parts with close tolerances and threaded parts. Corrosion resistance is good, chip resistance is excellent, and the black finish is quite decorative.
Electroless NickelElectroless nickel is a hard coating that provides corrosion protection, wear resistance, electrical conductivity, and consistent thickness. ASTM B 733
Electroless Nickel/TinElectroless Nickel/Tin is a bright tin-plating over a nickel coating that provides corrosion protection, electrical conductivity. Excellent for electronics where solder-ability and RF control are needed.
Electrolytic Nickel/TinElectrolytic Nickel/Tin provides corrosion protection and electrical conductivity. Excellent for electronic fasteners and contacts where solder-ability is required.
Magni 560 (Dip Spin)Magni 560 combines an electroplated zinc and chromate underlayer with an aluminum-rich epoxy topcoat. The zinc layer provides sacrificial protection of the substrate, and the topcoat creates a highly corrosion-resistant barrier. Salt spray protection over 1000 hours is normal, with up to 3000 hours measured on some parts. A friction modifier provides low torque for fastener applications. The color is flat silver/gray. The cost is about twice that of zinc.
Special EtchSpecial etch is a chemical etching process that cleans and brightens most aluminum parts.

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Brass/Copper Substrate

Coating/ProcessDescription
Electroless NickelElectroless nickel is a hard coating that provides corrosion protection, wear resistance, electrical conductivity, and consistent thickness. ASTM B 733
Electroless Nickel/TinElectroless Nickel/Tin is a bright tin-plating over a nickel coating that provides corrosion protection, electrical conductivity. Excellent for electronics where solder-ability is needed.
Electrolytic NickelElectrolytic nickel is a hard coating that provides corrosion protection, wear resistance, electrical conductivity, and bright finish. ASTM B 689
Electrolytic Nickel/TinElectrolytic Nickel/Tin provides corrosion protection and electrical conductivity. Excellent for electronic fasteners and contacts where solder-ability is required.
Electrodeposited TinElectrodeposited Tin provides corrosion protection and electrical conductivity. Excellent for electronic fasteners and contacts where solder-ability is required. ASTM B 545

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Stainless Steel Substrate

Coating/ProcessDescription
PassivatePassivate is a process that removes iron and foreign metals from the surface of stainless steel to help prevent oxidation and rust from forming on the surface.

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Steel/Steel Alloy Substrate

Coating/ProcessDescription
Black Polyurethane E-CoatBlack Polyurethane E-Coat is applied with an electrical current in an immersion process that results in a very uniform coating, even on complex parts. The thickness (0.2 to 1.0 mil) is lower than liquid paints or powder coat, making it ideal for parts with close tolerances and threaded parts. Corrosion resistance is good, chip resistance is excellent, and the black finish is quite decorative.
Clean and OilClean and oil is used to clean mill scale and dirt from steel parts and is followed by a dry-to-touch oil to protect from corrosion.
Copper Over NickelElectrodeposited Copper over Nickel produces an attractive finish that is highly conductive, solderable, and corrosion-resistant.
Electroless NickelElectroless nickel is a hard coating that provides corrosion protection, wear resistance, and consistent thickness. ASTM B 733
Electrolytic NickelElectrolytic nickel is a hard coating that provides corrosion protection, wear resistance, and bright finish. ASTM B 689
Electrodeposited TinElectrodeposited Tin provides corrosion protection and electrical conductivity. Excellent for electronic fasteners and contacts where solder-ability is required. ASTM B 545
Magni 560 (Dip Spin)Magni 560 combines an electroplated zinc and chromate underlayer with an aluminum-rich epoxy topcoat. The zinc layer provides sacrificial protection of the substrate, and the topcoat creates a highly corrosion-resistant barrier. Salt spray protection over 1000 hours is normal, with up to 3000 hours measured on some parts. A friction modifier provides low torque for fastener applications. The color is flat silver/gray. The cost is about twice that of zinc.
Zinc PlateZinc plating is a widely used coating that provides sacrificial corrosion protection for steel parts. This coating is applied using either barrel or rack methods (Clear, yellow). ASTM B 633

Other ASTM Specifications

Also see, Coating Specifications by Substrate, and our full list of Capabilities.

Zinc

B-633

Nickel

B-733 & B-689

Tin

B-545

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