ASTM标准材料标准,表面处理标准.doc

ALUMINUM BRASS / COPPER STAINLESS STEEL STEEL / STEEL ALLOYS ALUMINUM Anodize Anodize finishes are intended to provide corrosion protection and abrasion resistance for aluminum and aluminum alloys (Clear, Black). ASTM B 580 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 inan immersion process that results ina very uniform coating, even plex parts. The thickness ( to mil) is lower than liquid paints or powder coat, making itan 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 isa hard coating that provides corrosion protection, wear resistance, electrical conductivity, and consistent thickness. ASTM B 733 Electroless Nickel/Tin Electroless nickel/Tin isa 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 whe