1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 3211:2010Anodizing of aluminium andits alloys Assessment ofresistance of anodic oxidationcoatings to cracking bydeformation (ISO 3211:2010)BS EN ISO 3211:2010 BRITISH S
2、TANDARDNational forewordThis British Standard is the UK implementation of EN ISO 3211:2010.It supersedes BS EN 12373-15:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/32, Anodic oxidation coatings on aluminium.A list of organizations represent
3、ed on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 65993 5ICS 25.220.20; 77.120.10Compliance with a British Standard cannot co
4、nfer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2010.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3211 September 2010 ICS 25.220.
5、20 Supersedes EN 12373-15:2000English Version Anodizing of aluminium and its alloys - Assessment of resistance of anodic oxidation coatings to cracking by deformation (ISO 3211:2010) Anodisation de laluminium et de ses alliages - valuation de la rsistance des couches anodiques la formation de crique
6、s par dformation (ISO 3211:2010) Anodisieren von Aluminium und Aluminiumlegierungen - Prfung der Bestndigkeit von anodisch erzeugten Oxidschichten gegen Rissbildung bei Verformung (ISO 3211:2010) This European Standard was approved by CEN on 31 August 2010. CEN members are bound to comply with the C
7、EN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or
8、 to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official ver
9、sions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, S
10、lovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CE
11、N national Members. Ref. No. EN ISO 3211:2010: EBS EN ISO 3211:2010EN ISO 3211:2010 (E) 3 Foreword The text of ISO 3211:2010 has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys“ of the International Organization for Standardization (ISO) and has been taken over as EN IS
12、O 3211:2010 by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2011, and conflictin
13、g national standards shall be withdrawn at the latest by March 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document sup
14、ersedes EN 12373-15:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
15、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 3211:2010 has been approved by CEN as a EN ISO 3211:2010 without any modi
16、fication. BS EN ISO 3211:2010ISO 3211:2010(E) ISO 2010 All rights reserved iiiForeword ISO (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 IS
17、O technical 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 c
18、losely 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. D
19、raft 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 do
20、cument may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3211 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 2, Organic and anodic oxidation coatings on aluminium. This third editio
21、n cancels and replaces the second edition (ISO 3211:1977), which has been technically revised. BS EN ISO 3211:2010BS EN ISO 3211:2010INTERNATIONAL STANDARD ISO 3211:2010(E) ISO 2010 All rights reserved 1Anodizing of aluminium and its alloys Assessment of resistance of anodic oxidation coatings to cr
22、acking by deformation 1 Scope This International Standard specifies an empirical method for assessing the resistance of anodic oxidation coatings to cracking by deformation. The method is applicable particularly to sheet material with anodic oxidation coatings of thickness less than 5 m, and is usef
23、ul for development purposes. NOTE If the test piece is thick, even more than 5 m of coating can be measured (see Clause 6). 2 Principle A test piece is bent along a spiral, graduated with a radius of curvature index, using a simple instrument. The radius of curvature corresponding to the region wher
24、e the first cracks in the oxide layer appear is determined and the percentage elongation of the test piece corresponding to this radius is calculated. 3 Apparatus 3.1 Measuring instrument, as shown in Figure 1, which includes the following elements. 3.1.1 Steel former, mounted on a suitable base, in
25、 the shape of a spiral, graduated in deformation indexes, E, from 1 to 18. These indexes, E, correspond to radii of curvature, R, as shown in Table 1, and are derived from Equation (1): R = 21 E (1) where R is the radius of curvature, in centimetres; E is the deformation index corresponding to the r
26、egion where the first cracks appear. 3.1.2 Two screws, for clamping the ends of the test piece. BS EN ISO 3211:2010ISO 3211:2010(E) 2 ISO 2010 All rights reservedTable 1 Relationship between radius of curvature R and deformation index E Deformation index E Radius of curvature R cm Deformation index
27、E Radius of curvature R cm 1 20 10 11 2 19 11 10 3 18 12 9 4 17 13 8 5 16 14 7 6 15 15 6 7 14 16 5 8 13 17 4 9 12 18 3 4 Procedure 4.1 Test piece Cut a strip of anodized aluminium having approximately the following dimensions: length: 25 cm; width: 2 cm; maximum thickness: 0,5 cm. 4.2 Determination
28、Clamp one end of the test piece with the clamping screw 3 with the significant surface outwards. Bend the test piece progressively over the spiral, in such a way that the test piece remains in contact with the spiral, and clamp the other end with the second screw 5. Beginning from clamping screw 3,
29、examine the anodic oxidation coating and mark the region where the first cracks appear. lf the cracks are difficult to detect, they can be rendered visible using the procedure described in ISO 2085 by removing the bent test piece and immersing it in copper sulfate solution for 5 min, then rinsing an
30、d drying it. The test piece is then replaced on the apparatus and the deformation index corresponding to the region where the first cracks appear is marked. 5 Expression of results Express the elongation, A, of the anodized metal as a percentage using Equation (2): 1002dAR d=+(2) BS EN ISO 3211:2010
31、ISO 3211:2010(E) ISO 2010 All rights reserved 3where d is the thickness, in centimetres, of the test piece; R is the radius of curvature, in centimetres, given by Equation (1). 6 Test report The test report shall include at least the following information: a) a reference to this International Standa
32、rd; b) the type and identification of the product tested; c) the result of the test (see Clause 5); d) the thickness of the test piece, the anodic coating thickness and the index, E, in the case of a thick test piece with an anodic coating greater than 5 m; e) anything unusual noticed during the det
33、ermination; f) any operations not included in the procedure described in this International Standard, or considered to be optional; g) the date of the test. BS EN ISO 3211:2010ISO 3211:2010(E) 4 ISO 2010 All rights reservedKey 1 steel spiral 4 rubber pad 2 wooden base 5 clamping screw 3 clamping scr
34、ew, removable Figure 1 Deformation index measuring instrument (scale 1: 1,7) BS EN ISO 3211:2010ISO 3211:2010(E) ISO 2010 All rights reserved 5Bibliography 1 ISO 2085, Anodizing of aluminium and its alloys Check for continuity of thin anodic oxidation coatings Copper sulfate test This page deliberat
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