ASTM 标准材料标准,表面处理标准

    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 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 550 (Dip spin) Magni 550 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.     Back to Top BRASS / COPPER 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     Back to Top STAINLESS STEEL 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.     Back to Top STEEL & STEEL ALLOYS 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. 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, 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 550(Dip spin) Magni 550 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, black, or olive drab). ASTM B 633 Zinc Cobalt Plus Zinc cobalt plus is zinc plating that incorporates small amounts of cobalt metals into the plating. A clear hex free chromate is applied which is then sealed. This provides excellent corrosion protection. This is a barrel plating process and is available in “clear” or “bright” only. Meets European ELV standards. ASTM B 840     Back to Top ASTM B-449 SPECIFICATIONSFOR 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)     Back to Top ASTM B-545 SPECIFICATIONSFOR 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       Back to Top ASTM B-580 SPECIFICATIONSFOR ANODIZING OF ALUMINUM TYPE CLASS MIN. THICKNESS       Type B Architectural Class 1 .0007 Type C Architectural Class 2 .0004 Type D Automotive Exterior .0003 Type E Interior Moderate Abrasion .0002 Type F Interior Limited Abrasion .0001       Back to Top ASTM B-633 SPECIFICATIONSFOR 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 Colored Chromate (Yellow, Black, Olive Drab) .00019 Type III Fe/Zn 8 SC 2 Clear/Colorless Chromate .00031 Type II Fe/Zn 8 SC 2 Colored Chromate (Yellow, Black, Olive Drab) .00031 Rack Plate Only Type III Fe/Zn 12 SC 3 Clear/Colorless Chromate .00047 Type II Fe/Zn 12 SC 3 Colored Chromate (Yellow, Black, Olive Drab) .00047         Back to Top 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       Back to Top 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       Back to Top ASTM B-840 SPECIFICATIONS FOR ZINC-COBALT PLATING(For use on brass, copper, steel substrates) CLASS TYPE GRADE COLOR MIN. THICKNESS           Class 1 Type A Grade 6 Clear/Colorless Chromate .00023 Class 1 Type B Grade 6 Yellow Chromate .00023 Class 1 Type D Grade 6 Black Chromate .00023 Rack Only Class 1 Type A Grade 12 Clear/Colorless Chromate .00047 Class 1 Type B Grade 12 Yellow Chromate .00047 Class 1 Type D Grade 12 Black Chromate .00047 Class 1 Type A Grade 18 Clear/Colorless Chromate .0007 Class 1 Type B Grade 18 Yellow Chromate .0007 Class 1 Type D Grade 18 Black Chromate .0007