SAE J 399-1976 Anodized Aluminum Automotive Parts.pdf

1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro

2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (412) 772-8512 FAX: (412) 776-0243TO PLACE A DOCUMENT

3、 ORDER; (412) 776-4970 FAX: (412) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1985 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001INFORMATIONREPORTSubmitted for recognition as an American National Stand

4、ardJ399REAF.FEB85Issued 1969-06Reaffirmed 1985-02Superseding J399 APR76ANODIZED ALUMINUM AUTOMOTIVE PARTS1. ScopeAutomotive parts can be fabricated from either coiled sheet, flat sheet or extruded shapes. Alloyselection is governed by finish requirements, forming characteristics, and mechanical prop

5、erties.Bright anodizing alloys 5657 and 52521 sheet provide a high luster and are preferred for trim which can beformed from an intermediate temper, such as H25. Bright anodizing alloy 5457 is used for parts which requirehigh elongation and a fully annealed (“0“) temper. Alloy 6463 is a medium stren

6、gth bright anodizing extrusionalloy; Alloy X7016 is a high strength bright anodizing extrusion alloy primarily suited for bumper applications.To satisfy anti-glare requirements for certain trim applications, sheet alloy 5205 and extrusion alloy 6063 arecapable of providing the desired low-gloss anod

7、ized finish.Bright anodizing alloys require control of the chemical composition of the alloy to enhance response tochemical brightening and to result in the formation of anodic coatings that are essentially transparent.Additionally, aluminum producers employ fabricating practices to minimize other m

8、etallurgical factors thatadversely affect response to bright anodizing procedures. For non-heat-treatable alloys, a highly fragmentedgrain structure is preferred. Fully annealed, recrystallized grain structures are not optimum for brightanodizing. Where high elongations are required with intermediat

9、e tempers, fabricating practices are selectedto minimize grain recrystallization.Another factor to be considered for trim application is the type of mill surface finish that is required. When themetal working treatments do not mar the mill produced surface appreciably, the smooth, bright rolled,“aut

10、omotive trim“ surface is desirable since it often eliminates the need for expensive mechanical buffingoperations. Where trim fabricating procedures might be expected to damage a bright-rolled surface, duller millfinishes can be used and parts are buffed after forming. Bright rolled mill surfaces occ

11、asionally are protectedwith a removable tape or water soluble film.Selection of anodic coating required to protect aluminum parts is influenced by the required corrosionperformance and appearance characteristics. Generally, anodic coatings 0.00030.0005 in (0.00760.0127mm) thick are used for exterior

12、 trim application. Thinner anodic coatings 0.00010.0003 in (0.00250.0076mm) are sufficient for interior trim components. Anodic coatings can be dyed to impart color, painted, or inlaidwith vinyl or other plastics for aesthetic and/or functional purposes.1. Details of alloy numbers shown are publishe

13、d in Aluminum Association Standards.SAE J399 Reaffirmed FEB85-2-The Aluminum Associations “Designation System for Finishes“ is a recommended guide to assist in specifyinganodic coatings for automotive trim.The American Society for Testing and Materials (ASTM) offers several test methods which are co

14、mmonly usedas the basis for many user specifications. These are:ASTM B110Dielectric Strength of Anodically coated AluminumASTM B457Measuring Impedance of Anodic Coatings of AluminumASTM B244Measuring Thickness of Anodic Coatings on Aluminum with Eddy Current InstrumentsASTM B136Resistance of Anodica

15、lly Coated Aluminum to Staining by DyesASTM B137Weight of Coating on Anodically Coated AluminumASTM B368Copper-Accelerated Acetic Acid Salt Spray (Fog) Testing (CASS Test)ASTM B538Fact (Ford Anodized Aluminum Corrosion Test) TestingASTM B580Guide to the Specification of Anodic Oxide Coatings on Alum

16、inumASTM 429Measurement and Calculation of Reflecting Characteristics of Metallic Surfaces UsingIntegrating Sphere InstrumentsASTM E430Measurement of Gloss of High Gloss Metal Surfaces Using Abridged Goniophotometer orGoniophotometer2. References2.1 Applicable PublicationsThe following publications

17、form a part of this specification to the extent specifiedherein.2.1.1 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959ASTM B110Dielectric Strength of Anodically coated AluminumASTM B457Measuring Impedance of Anodic Coatings of AluminumASTM B244Measuring T

18、hickness of Anodic Coatings on Aluminum with Eddy Current InstrumentsASTM B136Resistance of Anodically Coated Aluminum to Staining by DyesASTM B137Weight of Coating on Anodically Coated AluminumASTM B368Copper-Accelerated Acetic Acid Salt Spray (Fog) Testing (CASS Test)ASTM B538Fact (Ford Anodized A

19、luminum Corrosion Test) TestingASTM B580Guide to the Specification of Anodic Oxide Coatings on AluminumASTM 429Measurement and Calculation of Reflecting Characteristics of Metallic Surfaces UsingIntegrating Sphere InstrumentsASTM E430Measurement of Gloss of High Gloss Metal Surfaces Using Abridged G

20、oniophotometeror GoniophotometerPREPARED BY THE SAE AUTOMOTIVE BRIGHT TRIM COMMITTEESAE J399 Reaffirmed FEB85RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationAutomotive parts can be fabricated from either coiled sheet, flat sheet or extruded shapes. Alloy

21、selection is governed by finish requirements, forming characteristics, and mechanical properties.Reference SectionThe Aluminum Associations “Designation System for Finishes“ASTM B110Dielectric Strength of Anodically coated AluminumASTM B136Resistance of Anodically Coated Aluminum to Staining by Dyes

22、ASTM B137Weight of Coating on Anodically Coated AluminumASTM B244Measuring Thickness of Anodic Coatings on Aluminum with Eddy Current InstrumentsASTM B368Copper-Accelerated Acetic Acid Salt Spray (Fog) Testing (CASS Test)ASTM B429Measurement and Calculation of Reflecting Characteristics of Metallic

23、Surfaces UsingIntegrating Sphere InstrumentsASTM B457Measuring Impedance of Anodic Coatings of AluminumASTM B538Fact (Ford Anodized Aluminum Corrosion Test) TestingASTM B580Guide to the Specification of Anodic Oxide Coatings on AluminumASTM E430Measurement of Gloss of High Gloss Metal Surfaces Using Abridged Goniophotometer orGoniophotometerDeveloped by the SAE Automotive Bright Trim Committee