1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 28340:2013Combined coatings on aluminium General specifications for combined coatings of electrophoretic organic coatings and anodic oxidation coatings on aluminiumBS ISO
2、28340:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 28340:2013. The UK participation in its preparation was entrusted to TechnicalCommittee STI/32, Anodic oxidation coatings on aluminium. A list of organizations represented on this committee can be obtai
3、ned on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 75501 9 ICS 25.220.20 Compliance
4、with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 28340:2013 ISO 2013Combined coatings on a
5、luminium General specifications for combined coatings of electrophoretic organic coatings and anodic oxidation coatings on aluminiumRevtements combins sur aluminium Spcifications gnrales pour les revtements combins appliqus sur laluminium composs dun revtement organique obtenu par lectrophorse appli
6、qu sur un revtement obtenu par anodisationINTERNATIONAL STANDARDISO28340First edition2013-02-15Reference numberISO 28340:2013(E)BS ISO 28340:2013ISO 28340:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publi
7、cation may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the count
8、ry of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 28340:2013ISO 28340:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative referenc
9、es 13 Terms and definitions . 24 Classes . 25 Quality . 35.1 General . 35.2 Appearance 35.3 Colour 35.4 Gloss . 35.5 Thickness of anodic oxidation coating . 35.6 Corrosion resistance 35.7 Resistance to accelerated weathering . 45.8 Resistance to cyclic corrosion/UV light . 45.9 Outdoor exposure . 45
10、.10 Hardness of the organic coating . 45.11 Adhesion of the organic coating . 45.12 Solvent resistance of the organic coating . 45.13 Chemical resistance 45.14 Abrasion resistance . 56 Test specimen 56.1 Sampling procedure . 56.2 Size of the test specimen 56.3 Cleanliness of the test specimen 57 Tes
11、t 57.1 General condition . 57.2 Test methods . 58 Expression of results .129 Test report 12Annex A (informative) Recommended characteristics and performance 13Annex B (normative) Rating number charts for evaluation of the corrosion rate 15Annex C (normative) Rating number charts for evaluation of th
12、e alkali resistance test16Bibliography .17BS ISO 28340:2013ISO 28340:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO t
13、echnical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates clos
14、ely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft
15、International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document
16、 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 28340 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 2, Organic and anodic oxidation coatings on aluminium.iv ISO 2013 All rights r
17、eservedBS ISO 28340:2013INTERNATIONAL STANDARD ISO 28340:2013(E)Combined coatings on aluminium General specifications for combined coatings of electrophoretic organic coatings and anodic oxidation coatings on aluminium1 ScopeThis International Standard gives specifications for the combined coatings
18、of electrophoretic organic coatings and anodic oxidation coatings on aluminium used for architecture.It specifies the characteristic properties of combined coatings on aluminium, outlines the test methods for checking these characteristic properties and specifies their required performance.2 Normati
19、ve referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) app
20、lies.ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical methodISO 2360, Non-conductive coatings on non-magnetic electrically conductive basis materials Measurement of coating thickness Amplitude-sensitive eddy-current methodISO 2409, Paints and varnishes Cross-cut t
21、estISO 2810, Paints and varnishes Natural weathering of coatings Exposure and assessmentISO 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20 degrees, 60 degrees and 85 degreesISO 2859-10, Sampling procedures for inspection by attributes Part 10: Introducti
22、on to the ISO 2859 series of standards for sampling for inspection by attributesISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation systemISO
23、 4892-4, Plastics Methods of exposure to laboratory light sources Part 4: Open-flame carbon-arc lampsISO 7599, Anodizing of aluminium and its alloys General specifications for anodic oxidation coatings on aluminiumISO 7668, Anodizing of aluminium and its alloys Measurement of specular reflectance an
24、d specular gloss of anodic oxidation coatings at angles of 20 degrees, 45 degrees, 60 degrees or 85 degreesISO 8251, Anodizing of aluminium and its alloys Measurement of abrasion resistance of anodic oxidation coatingsISO 8993, Anodizing of aluminium and its alloys Rating system for the evaluation o
25、f pitting corrosion Chart methodISO 9227, Corrosion tests in artificial atmospheres Salt spray testsISO 11341, Paints and varnishes Artificial weathering and exposure to artificial radiation Exposure to filtered xenon-arc radiation ISO 2013 All rights reserved 1BS ISO 28340:2013ISO 28340:2013(E)ISO
26、11507, Paints and varnishes Exposure of coatings to artificial weathering Exposure to fluorescent UV lamps and waterISO 15184, Paints and varnishes Determination of film hardness by pencil testAAMA 612-02, Voluntary specification, performance requirements, and test procedures for combined coatings o
27、f anodic oxide and transparent organic coatings on architectural aluminum3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1combined coatingssuperimposed electrophoretic organic coating and anodic oxidation coating on aluminium3.2significant surfac
28、epart of the article covered or to be covered by the coatings, and for which the coatings are essential for service and/or appearance3.3standard samplelimit samplesample which defines the criteria for acceptable appearanceNote 1 to entry: This may be agreed between the surface processor and the cust
29、omer.4 ClassesThe combined coatings are classified by corrosion resistance, which is specified in 5.6, resistance to accelerated weathering specified in 5.7, and resistance to cyclic corrosion/UV light specified in 5.8.Performance requirements are given in Table 1.To test the corrosion resistance, t
30、he acetic acid salt spray (AASS) test (method A) or copper-accelerated acetic acid salt spray (CASS) test (method B) shall be carried out.To test the resistance to accelerated weathering, the xenon-arc lamp exposure test (method A) or the open-flame carbon-arc lamp exposure test (method B) shall be
31、carried out.To test the resistance to cyclic corrosion/UV light, the AASS test (method A) shall be carried out or the CASS test (method B) after the ultraviolet (UV) lamp exposure test specified in 5.8. The selection of the test method should be agreed between the surface processor and the customer.
32、NOTE Classes and applied environments are given in Table A.1.2 ISO 2013 All rights reservedBS ISO 28340:2013ISO 28340:2013(E)Table 1 Classes of combined coatings on aluminiumCharacteristic prop-ertyCorrosion resist-anceResistance to acceler-ated weatheringResistance to cyclic corrosion/UV lightTest
33、method A B A B A BAASS CASS Xenon-arc lampCarbon-arc lampUV AASS UV CASSTesting time hClass 4 1 500 120 4 000 3 000 240 1 500 240 120Class 3 1 500 120 2 000 1 500 240 1 500 240 120Class 2 1 000 72 1 000 750 240 1 000 240 72Class 1 24 350 250 - - - -Criteria Corrosion: RN 9,5 or moreNo remarkable col
34、our change and chalking Gloss retention: 75 % or moreCorrosion: RN 9,0 or more5 Quality5.1 GeneralThe required quality for the applied products shall be chosen from the performances specified in 5.2 to 5.14 which should be agreed between the surface processor and the customer.5.2 AppearanceThe appea
35、rance shall be examined by the method specified in 7.2.1, and any visual surface defects, such as scratches, unevenness, peeling, which are unacceptable for the application, shall not be permitted. The quality should be agreed between the surface processor and the customer.5.3 ColourThe colour and i
36、ts tolerance level shall be examined by the method specified in 7.2.2, and the quality should be agreed between the surface processor and the customer.5.4 GlossThe specular gloss of the electrophoretic organic coating shall be examined by the method specified in 7.2.3, and the quality should be agre
37、ed between the surface processor and the customer.5.5 Thickness of anodic oxidation coatingThe thickness of anodic oxidation coating shall be measured by the method specified in 7.2.4, and the quality should be agreed between the surface processor and the customer. The average thickness of anodic ox
38、idation coating, as specified in ISO 7599, shall be more than 5 m. Furthermore, the minimum local thickness shall not be less than 80 % (4 m) of the average thicknesses at three or more measurement points.The total thickness of the combined coatings is not specified because specification is based on
39、 performance.5.6 Corrosion resistanceThe corrosion resistance of the combined coatings shall be tested by the AASS test specified in 7.2.5.2 or the CASS test specified in 7.2.5.3 and shall be evaluated by the degradation in appearance and the corrosion rate rating number(RN) for the test specimens.
40、The selection of the test method should be agreed between the surface processor and the customer. The testing time and the quality of the combined coatings shall conform to Table 1. ISO 2013 All rights reserved 3BS ISO 28340:2013ISO 28340:2013(E)5.7 Resistance to accelerated weatheringThe accelerate
41、d weathering resistance shall be tested by the xenon-arc lamp exposure test specified in 7.2.6.2 or the open-flame carbon-arc lamp exposure test specified in 7.2.6.3. The performance shall be evaluated by the visual degradation, such as colour change, chalking, and gloss-retention of the organic coa
42、ting. The testing time and the quality of the combined coatings shall conform to Table 1.5.8 Resistance to cyclic corrosion/UV lightThe resistance to cyclic corrosion/UV light shall be tested by the AASS test specified in 7.2.5.2 or the CASS test specified in 7.2.5.3, after having been tested by UV
43、lamp exposure, as specified in 7.2.7. The performance shall conform to Table 1.5.9 Outdoor exposureIf required by the customer, the resistance to outdoor exposure shall be tested, and the exposure site, the testing time and the required performance should be agreed between the surface processor and
44、the customer. This test shall be carried out by the method specified in 7.2.8, and the deterioration of the test specimens shall be evaluated by the change in appearance, gloss-retention and corrosion rate (RN). A recommended example of the outdoor exposure test and fastness are given in Table A.2.5
45、.10 Hardness of the organic coatingThe surface hardness of the electrophoretic organic coating shall be tested by the method specified in 7.2.9, and shall be evaluated by the degree of pencil hardness to be scratched. The hardness of the electrophoretic organic coating shall be more than 3 H in all
46、classes.5.11 Adhesion of the organic coatingThe adhesion between the anodic oxidation coating and the electrophoretic organic coating shall be tested by the cross-cut test specified in 7.2.10.2 and the cross-cut test after immersion in boiling water specified in 7.2.10.3, and the performance shall b
47、e evaluated by the degree of exfoliation of the electrophoretic organic coating. The required adhesion of the organic coatings of all classes shall conform to Table 2.Table 2 Required adhesion of the organic coatingCross-cut test Cross-cut test after immersion in boiling waterAdhesion Appearance Adh
48、esion25/25 Without wrinkles, cracks and remark-able colour change on the significant surface25/255.12 Solvent resistance of the organic coatingThe solvent resistance of the electrophoretic organic coating shall be evaluated by using the method specified in 7.2.11. The change in hardness of the elect
49、rophoretic organic coating of all classes after the solvent resistance test shall be within 1H without swellings, cracks and peeling on the significant surface.5.13 Chemical resistanceIf required by the customer, the chemical resistance of the combined coatings shall be tested.This test shall be carried out with the alkali resistance test specified in 7.2.12.2 and/or the acid resistance test specified in 7.2.12.3, and evaluated by the appearance and corrosion rate (RN) of the
