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Technical Specifications Page Heading

ALUMINUM BRASS / COPPER STAINLESS STEEL STEEL / STEEL ALLOYS

ALUMINUM SUBSTRATE
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-Coat
Black 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 an ideal finish for parts with close tolerances and threaded parts. Corrosion resistance is good, chip resistance is excellent, and the black finish is quite decorative.
Electroless Nickel
Electroless nickel is a hard coating that provides corrosion protection, wear resistance, electrical conductivity, and consistent thickness. ASTM B 733
Electroless Nickel/Tin
Electroless 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/Tin
Electrolytic 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 Etch
Special etch is a chemical etching process that cleans and brightens most aluminum parts.

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BRASS / COPPER SUBSTRATE
Electroless Nickel
Electroless nickel is a hard coating that provides corrosion protection; wear resistance, electrical conductivity, and consistent thickness. ASTM B 733
Electroless Nickel/Tin
Electroless 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 Nickel
Electrolytic nickel is a hard coating that provides corrosion protection; wear resistance, electrical conductivity, and bright finish. ASTM B 689
Electrolytic Nickel/Tin
Electrolytic Nickel/Tin provides corrosion protection and electrical conductivity.   Excellent for electronic fasteners and contacts where solder-ability is required.
Electrodeposited Tin
Electrodeposited 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
Passivate Passivate 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
Black Polyurethane
E-Coat
Black 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 an ideal finish 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 Oil
Clean 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 Nickel

Electrodeposited Copper over Nickel produces an attractive finish that is highly conductive, solderable and corrosion resistant.

Electroless Nickel

Electroless nickel is a hard coating that provides corrosion protection, wear resistance, and consistent thickness. ASTM B 733

Electrolytic Nickel

Electrolytic nickel is a hard coating that provides corrosion protection; wear resistance, and bright finish. ASTM B 689

Electrodeposited Tin

Electrodeposited 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 Plate

Zinc 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

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Technical Specifications Page Heading

ASTM B-449 SPECIFICATIONS
FOR CHROMATES ON ALUMINUM

CLASS COLOR

Class 1

Yellow to Brown

Class 2

Colorless to Yellow

Class 3 Colorless
Class 4 Light Green to Green (NOT AVAILABLE)

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ASTM B-545 SPECIFICATIONS
FOR ELECTRODEPOSITED TIN

(For use on aluminum, copper, brass, steel substrates)

CLASS SERVICE CONDITIONS MIN. THICKNESS

Class A

Mild

.0001

Class B

Mild

.0002
Class C Moderate .0003
Class D Severe .0005
Class E Very Severe

.0012 (NOT AVAILABLE)

Class F Similar to Class A .00005

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ASTM B-580 SPECIFICATIONS
FOR ANODIZING OF ALUMINUM

TYPE CLASS MIN. THICKNESS
Type B Architectural Class 1 .0007(NOT AVAILABLE)
Type C Architectural Class 2 .0004
Type D Automotive Exterior .0003
Type E Interior Moderate Abrasion .0002
Type F Interior Limited Abrasion .0001

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ASTM B-633 SPECIFICATIONS
FOR ZINC PLATING
(For use on brass, copper, steel substrates)

TYPE CLASS COLOR MIN. THICKNESS
Type III Fe/Zn 5 SC 1 Clear/Colorless Chromate .00019
Type II Fe/Zn 5 SC 1 Yellow Chromate .00019
Type III Fe/Zn 8 SC 2 Clear/Colorless Chromate .00031
Type II Fe/Zn 8 SC 2 Yellow Chromate .00031
Rack Plate Only
Type III Fe/Zn 12 SC 3 Clear/Colorless Chromate .00047
Type II Fe/Zn 12 SC 3 Yellow Chromate .00047

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ASTM B-689 SPECIFICATIONS FOR ELECTROLYTIC NICKEL (BARREL)
(For use on aluminum, brass, copper, and steel substrates)

TYPE CLASS MIN. THICKNESS
Type 2 Class 5 .00019

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ASTM B-733 SPECIFICATIONS FOR ELECTROLESS NICKEL
(All Type 4 Mid Phos 4-9%;
for aluminum, brass,
copper & steel substrates)

CLASS SERVICE MIN. THICKNESS

Class 1 & 3 SC-0

Minimum

.00004

Class 1 & 3 SC-1 Light .0002
Class 1 & 3 SC-2 Mild .0005
Class 1 & 3 SC-3 Moderate .001

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