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1、AS 12312000 Australian Standard Aluminium and aluminium alloys Anodic oxidation coatings AS 1231 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 This Australian Standard was prepared by Committee MT/9, Metal Finishing. It was approved on behalf of the Council of Standards Australia on 16 Ju
2、ne 2000 and published on 19 July 2000. The following interests are represented on Committee MT/9: Australasian Institute of Metal Finishing Australian Chamber of Commerce and Industry Australian Industry Group Department of Defence (Australia) Galvanising Association of New Zealand Galvanizers Assoc
3、iation of Australia Institute of Materials Engineering Australasia Powder Coaters Association Royal Australian Chemical Institute Society of Automotive Engineers, Australasia Telstra Corporation Additional interests participating in the preparation of this Standard: Aluminium fabricators Anodisers A
4、ustralian Window Association Technical publishers Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments m
5、ay be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about Standards can be found by visiting the Stand
6、ards Australia web site at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Australian Standard, has a full listing of revisions and amendments published each mon
7、th. We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at .au, or write to the Chief Executive, Standards Australia International Ltd, PO Box 1055, Strathfield, NSW
8、2135. This Standard was issued in draft form for comment as DR 99260. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 12312000 Australian Standard Aluminium and aluminium alloys Anodic oxidation coatings Originated as AS K1501963. AS 19561974 and AS 12311985 revised, amalgamated and rede
9、signated AS 12312000. COPYRIGHT Standards Australia International All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia
10、 International Ltd PO Box 1055, Strathfield, NSW 2135, Australia ISBN 0 7337 3481 2 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 123120002 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee MT/9, Metal Finishing, to supersede AS 1231198
11、5, Aluminium and aluminium alloysAnodised coatings for architectural applications and AS 19561976, Anodic oxidation coatings on aluminium for decorative and automotive applications. These two Standards have been combined because of the similarity of their technical content. During this revision cogn
12、izance was taken of the following International (ISO), British and American Standards: ISO 7599:1983Anodizing of aluminium and its alloysGeneral specifications for anodic oxide coatings on aluminium. BS 1615:1987Anodic oxidation coatings on aluminium and its alloys. 3987:1991Anodic oxidation coating
13、s on wrought aluminium for external architectural applications. ASTM B 580-79Specification for anodic oxide coatings on aluminium This Standard is based primarily on BS 1615 which is considered by Committee MT/9 as the most appropriate and most up-to-date of the four Standards listed. This Standard
14、is the result of a consensus among the representatives on the Joint Committee to produce it as an Australian Standard. The term informative has been used in this Standard to define the application of the appendix to which it applies. An informative appendix is only for information and guidance. Acce
15、ssed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 123120003 CONTENTS Page 1SCOPE4 2REFERENCED DOCUMENTS4 3DEFINITIONS6 4DESIGNATION7 5VISUAL INSPECTION AFTER ANODISING 7 6SAMPLING8 7THICKNESS OF COATING 8 8SEALING .9 9ABRASION RESISTANCE9 10CORROSION RESISTANCE.10 11LIGHT FASTNESS AND RESISTAN
16、CE TO HEAT.10 12LIGHT REFLECTION PROPERTIES10 13INFRA-RED REFLECTANCE.11 14ELECTRICAL BREAKDOWN POTENTIAL11 APPENDICES APURCHASING GUIDELINES 12 BGUIDANCE ON THE CHOICE OF ALUMINIUM GRADE14 CMAINTENANCE OF ANODISED ALUMINIUM15 DHANDLING AND TEMPORARY PROTECTION DURING TRANSPORTATION AND INSTALLATION
17、16 EGUIDANCE ON SURFACE TEXTURE.17 FGUIDANCE ON COLOUR .18 GGUIDANCE ON VISUAL INSPECTION AFTER ANODISING19 HGUIDANCE ON THE CHOICE OF COATING THICKNESS GRADES .20 IATMOSPHERIC ENVIRONMENTS22 JGUIDANCE ON ABRASION RESISTANCE.25 KGUIDANCE ON LIGHT FASTNESS TESTING.26 LGUIDANCE ON LIGHT REFLECTION PRO
18、PERTIES.27 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 12312000 Standards A.au 4 STANDARDS AUSTRALIA Australian Standard Aluminium and aluminium alloys Anodic oxidation coatings 1 SCOPE This Standard specifies requirements for anodic oxidation coatings on aluminium and its alloys for
19、 general applications and for external architectural applications. This Standard is not applicable to (a)non-porous anodic oxidation coatings of the barrier-layer type; (b)coatings produced by chromic acid anodising; (c)hard anodic oxidation coatings that are used mainly for engineering purposes and
20、 that have abrasion and wear resistance as their primary characteristics; and (d)anodic oxidation coatings intended merely to prepare a substrate for subsequent application of organic coatings or the electrodeposition of metals. NOTES: 1The coatings covered by this Standard consist mainly of alumini
21、um oxide and are produced by an electrolytic oxidation process during which the aluminium acts as the anode. 2Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are given in Appendix A. 3Although not specified, the quality and composition of alu
22、minium or aluminium alloys should be suitable for anodising. (See Appendix B). 4Information on maintenance of coatings is given in Appendix C. 5Advice on handling and temporary protection of anodised products during transportation and installation is given in Appendix D. Details of wrought aluminium
23、 and aluminium-alloy product types are given in the following Standards: (i)Sheet and plate AS/NZS 1734. (ii)Drawn wire, rod, bar and strip . AS/NZS 1865. (iii)Extruded rod, bar, solid and hollow shapes. AS/NZS 1866. (iv)Drawn tubes AS/NZS 1867. 2 REFERENCED DOCUMENTS The following documents are ref
24、erred to in this Standard: AS 1199Sampling procedures and tables for inspection by attributes 1399Guide to AS 1199Sampling procedures and tables for inspection by attributes 1874Aluminium and aluminium alloysIngots and castings 2331Methods of test for metallic and related coatings 2331.3.3Method 3.3
25、: Corrosion and related property testsCopper accelerated acetic acid salt spray (CASS) test Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 12312000 .au Standards Australia 5 AS/NZS 1734Aluminium and aluminium alloysFlat sheet, coiled sheet and plate 1865Aluminium and aluminium alloysDra
26、wn wire, rod, bar and strip 1866Aluminium and aluminium alloysExtruded rod, bar, solid and hollow shapes 1867Aluminium and aluminium alloysDrawn tubes BS 3745Method for the evaluation of results of accelerated corrosion tests on metallic coatings 3987Specification for anodic oxidation coatings on wr
27、ought aluminium for external architectural applications 6161Methods of test for anodic oxidation coatings on aluminium and its alloys 6161.4Part 4:Assessment of sealing quality by measurement of the loss of mass after immersion in acid solution 6161.7Part 7:Accelerated determination of light fastnes
28、s of coloured anodic oxidation coatings using artificial light 6161.11Part 11:Measurement of total reflectance using a photoelectric reflectometer 6161.12Part 12:Measurement of specular reflectance and specular gloss at angles of 20, 45, 60 or 85 6161.13Part 13:Visual determination of image clarity.
29、 Chart scale method 6161.14Part 14:Determination of infra-red reflectance 6161.15Part 15:Determination of electrical breakdown potential 6161.18Part 18:Determination of surface abrasion resistance BS EN 12373Aluminium and aluminium alloysAnodizing 12373-2Part 2:Determination of mass per unit area (s
30、urface density) of anodic oxidation coatingsGravimetric method 12373-3Part 3:Determination of thickness of anodic oxidation coatingsNon- destructive measurement by split-beam microscope 12373-4Part 4:Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test w
31、ith prior acid treatment 12373-5Part 5:Assessment of quality of sealed anodic oxidation coatings by measurement of admittance 12373-6Part 6:Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution without pr
32、ior acid treatment 12373-7Part 7:Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution with prior acid treatment 12373-8Part 8:Determination of the comparative fastness to ultra-violet light and heat of c
33、oloured anodic oxidation coatings 12373-9Part 9:Measurement of wear resistance and wear index of anodic oxidation coatings using an abrasive wheel wear test apparatus 12373-10Part 10: Measurement of mean specific abrasion resistance of anodic oxidation coatings using an abrasive jet test apparatus I
34、SO 1463Metallic and oxide coatingsMeasurement of coating thicknessMicroscopical method 2360Non-conductive coatings on non-magnetic basis metalsMeasurement of coating thicknessEddy current method 9223Corrosion of metals and alloysCorrosivity of atmospheresClassification Accessed by UNIVERSITY OF SOUT
35、H AUSTRALIA on 25 Sep 2008 AS 12312000 Standards A.au 6 3 DEFINITIONS For the purpose of this Standard, the definitions below apply. 3.1 Anodised aluminium Aluminium with an anodic oxidation coating, produced by an electrolytic oxidation process, in which the surface of the aluminium is converted to
36、 a coating, generally an oxide, having protective, decorative or functional properties. 3.2 Average coating thickness The mean value of not fewer than five local thickness measurements that are evenly distributed over the significant surface of a single anodised piece, or the value obtained using th
37、e gravimetric method of thickness determination. 3.3 Contact mark Discontinuity in an anodic coating at the point where electrical contact existed during anodising. 3.4 Finishes 3.4.1 Bright anodised aluminium Anodised aluminium with a soft bright to a high specular reflectance as a primary characte
38、ristic. 3.4.2 Clear anodised aluminium Aluminium with a substantially colourless, translucent anodic oxidation coating. NOTE: Clear anodised aluminium is also referred to as natural anodised aluminium; it can have either a matt finish or a bright finish. 3.4.3 Colour anodised aluminium Anodised alum
39、inium coloured either during anodising or by subsequent processing. 3.4.4 Dyed anodised aluminium Aluminium with an anodic oxidation coating coloured by absorption of dyestuffs or pigments into the pore structure. 3.4.5 Electrolytically coloured anodised aluminium Aluminium with an anodic oxidation
40、coating that has been coloured by the electrolytic deposition of a metal or metal oxide in the pore structure. 3.4.6 Integral colour anodised aluminium Aluminium that has been anodised using an appropriate (usually organic acid-based) electrolyte which produces a coloured coating during the anodisin
41、g process itself. 3.4.7 Matt anodised aluminium Anodised aluminium with a low specular reflectance. 3.5 Impregnation A treatment carried out after anodising in order to plug the pores of the anodic oxidation coating, but not involving hydrothermal sealing. 3.6 Local thickness The mean of not fewer t
42、han three thickness measurements, within a small area (10 mm diameter, or less) of the significant surface of a single anodised piece. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 25 Sep 2008 AS 12312000 .au Standards Australia 7 3.7 Sealing A hydrothermal or impregnation treatment carried out after
43、 anodising to reduce porosity and absorptivity of the anodic oxidation coating. 3.8 Significant surface The part of the article covered or to be covered by a coating, which is essential for serviceability and/or appearance. 4 DESIGNATION The designation for anodised coatings shall comprise the numbe
44、r of this Standard, i.e. AS 1231, followed by the thickness grade, comprising the letters AA and a number representing the minimum average thickness, in micrometres. Example of designation: AS 1231 AA25. 5 VISUAL INSPECTION AFTER ANODISING 5.1 General For control purposes at the anodisers works, the
45、 anodised aluminium shall be inspected at a distance commensurate with that at which it will normally be viewed, either when it is sold or when it is used, depending on which is considered by the purchaser to be the more important. NOTE: For further advise on the inspection of anodised aluminium, re
46、fer to Appendix A, Paragraph A2.2. For inspection by comparison with agreed samples that show surface texture and/or colour limits, each sample and the article to be inspected shall be held close together and in the same plane. For external applications, the coating on significant surfaces, when vie
47、wed at a distance of not less than 3 m, shall be continuous and have uniform appearance, finish and colour. NOTES: 1Guidance on surface texture is given in Appendix E. 2Guidance on colour is given in Appendix F. 3Guidance on visual inspection is given in Appendix G. 5.2 Freedom from defects and work
48、manship The anodic coatings shall be continuous, smooth, adherent, uniform in appearance, and shall be free of powdery areas (burns), loose films, stains, discolorations, and discontinuities such as pits, breaks and scratches, or other damage. The size and number of contact marks shall be the minimu
49、m consistent with good practice. The location of contact marks shall be in areas of minimum exposure to service environmental conditions when important to the function of the part. NOTES: 1Defects cannot be completely quantified. Where the presence, size or frequency of defects in the coating is considered to be of concern, appropriate arrangements should be made between the purchaser and the anodise