DIN EN ISO 6581-2010 Anodizing of aluminium and its alloys - Determination of the comparative fastness to ultraviolet light and heat of coloured anodic oxidation coatings (ISO 6581.pdf

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1、December 2010 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC

2、S 25.220.20!$lUL“1735041www.din.deDDIN EN ISO 6581Anodizing of aluminium and its alloys Determination of the comparative fastness to ultraviolet light and heat ofcoloured anodic oxidation coatings (ISO 6581:2010)English translation of DIN EN ISO 6581:2010-12Anodisieren von Aluminium und Aluminiumleg

3、ierungen Vergleichsbestimmung der Bestndigkeit von gefrbten, anodisch erzeugtenOxidschichten gegen ultraviolettes Licht und Wrme (ISO 6581:2010)Englische bersetzung von DIN EN ISO 6581:2010-12Anodisation de laluminium et de ses alliages Dtermination de la solidit compare la lumire ultraviolette et l

4、a chaleur descouches anodiques colores (ISO 6581:2010)Traduction anglaise de DIN EN ISO 6581:2010-12SupersedesDIN EN 12373-8:1999-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1112.10 DIN EN ISO 6581:2010-12 2 A comma is used a

5、s the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys”, Subcommittee SC 2/WG 16 “Revisions for systematic reviewed TC 79/SC 2 ISO standards” (Secretariat: JISC, Japan) in collaboration with Technical Committee CEN/TC 1

6、32 “Aluminium and aluminium alloys”, Working Group WG 15 “Aluminium anodisation” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Nichteisenmetalle (Nonferrous Metals Standards Committee), Working Committee NA 066-01-09 AA Anodisch o

7、xidiertes Aluminium. Amendments This standard differs from DIN EN 12373-8:1999-02 as follows: a) the standard has been taken over as DIN EN ISO 6581:2010-12 (the main title has been adapted), see National Annex NA; b) the standard has been editorially revised. Previous editions DIN EN 12378-8: 1999-

8、02 DIN EN ISO 6581:2010-12 3 National Annex NA (informative) Correspondence between the previous standards series DIN EN 12373 “Aluminium and aluminium alloys Anodizing” and the corresponding new ISO and DIN EN ISO Standards Table NA.1 Correspondence previous now DIN EN 12373 DIN EN ISO Part 1 7599

9、General specifications for anodic oxidation coatings on aluminium The title has been slightly changed Part 2 2106 Determination of mass per unit area (surface density) of anodic oxidation coatings Gravimetric method Part 3 2128 Determination of thickness of anodic oxidation coatings Non-destructive

10、measurement by split-beam microscope Part 4 2143 Estimation of loss of absorptive power of anodic oxidation coatings after sealing Dye spot test with prior acid treatment Part 5 2931 Assessment of quality of sealed anodic oxidation coatings by measurement of admittance Part 6 Part 7 3210 Assessment

11、of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution The title has been changed: with/without prior acid treatment Part 8 6581 Determination of the comparative fastness to ultra-violet light and heat of coloured an

12、odic oxidation coatings Part 9 Part 10 8251 Measurement of abrasion resistance of anodic oxidation coatings The title has been changed Part 11 7668 Measurement of specular reflectance and specular gloss of anodic oxidation coating at angles of 20 degrees, 45 degrees, 60 degrees or 85 degrees Part 12

13、 6719 Measurement of reflectance characteristics of aluminium surfaces using integrating-sphere instruments Part 13 7759 Measurement of reflectance characteristics of aluminium surface using a goniophotometer or an abridged goniophotometer The German title has been slightly changed Part 14 10215 Vis

14、ual determination of image clarity of anodic oxidation coatings Chart scale method Part 15 3211 Assessment of resistance of anodic oxidation coatings to cracking by deformation Part 16 2085 Check for continuity of thin anodic oxidation coatings Copper sulphate test Part 17 2376 Determination of elec

15、tric breakdown potential Part 18 8993 Rating system for the evaluation of pitting corrosion Chart method Part 19 8994 Rating system for the evaluation of pitting corrosion Grid method Anodizing of aluminium and its alloys DIN EN ISO 6581:2010-12 4 This page is intentionally blank EUROPEAN STANDARD N

16、ORME EUROPENNE EUROPISCHE NORM EN ISO 6581 July 2010 ICS 25.220.20 Supersedes EN 12373-8:1998English Version Anodizing of aluminium and its alloys - Determination of the comparative fastness to ultraviolet light and heat of coloured anodic oxidation coatings (ISO 6581:2010) Anodisation de laluminium

17、 et de ses alliages - Dtermination de la solidit compare la lumire ultraviolette et la chaleur des couches anodiques colores (ISO 6581:2010) Anodisieren von Aluminium und Aluminiumlegierungen - Vergleichsbestimmung der Bestndigkeit von gefrbten, anodisch erzeugten Oxidschichten gegen ultraviolettes

18、Licht und Wrme (ISO 6581:2010) This European Standard was approved by CEN on 23 June 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date l

19、ists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or 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 r

20、esponsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece

21、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management

22、 Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6581:2010: EContents EN ISO 6581:2010 (E) DIN EN ISO 6581:2010-12 2 Page Foreword3 Introduction .4 1 Scope 5 2 Principle5 3 Apparat

23、us .5 3.1 General5 3.2 Cabinet5 3.3 Ultraviolet light source6 3.4 Specimen arrangement .6 4 Procedure .6 4.1 General6 4.2 Control specimens.7 4.3 Effect of ozone production .7 5 Expression of results 7 6 Test report 7 Foreword This document (EN ISO 6581:2010) has been prepared by Technical Committee

24、 ISO/TC 79 Light metals and their alloys” in collaboration with 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 endorse

25、ment, at the latest by January 2011, and conflicting national standards shall be withdrawn at the latest by January 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 identif

26、ying any or all such patent rights. This document supersedes EN 12373-8:1998. 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,

27、 Denmark, Estonia, Finland, France, Germany, Greece, 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 6581:2010 has been ap

28、proved by CEN as a EN ISO 6581:2010 without any modification. “EN ISO 6581:2010 (E) DIN EN ISO 6581:2010-12 3 Introduction The test described in this International Standard represents severe exposure to ultraviolet light and, because of its severity, provides a very rapid determination of the compar

29、ative light-fastness of coloured anodic oxidation coatings. It has to be realized, however, that the light emitted by the mercury vapour source used in the test has a discontinuous spectrum and a high content of ultraviolet radiation. Care must therefore be taken in comparing the results of this tes

30、t with the results of exposure to sunlight. Considerable heat is generated by the light source, and the test needs to be carried out in such a way that the temperature of the test pieces during the test does not exceed 100 C. EN ISO 6581:2010 (E) DIN EN ISO 6581:2010-12 4 1 Scope This International

31、Standard specifies a comparative method for the determination of the fastness of coloured anodic oxidation coatings to ultraviolet (UV) light and heat. The method is not suitable for testing coloured anodic oxidation coatings that are heat sensitive. NOTE Dark-coloured test pieces will normally reac

32、h the highest temperatures. 2 Principle Test pieces are exposed to ultraviolet light and the colour changes taking place are observed and compared with standard or control specimens. 3 Apparatus 3.1 General The apparatus consists of a cabinet made from suitable heat-resistant material with a source

33、of ultraviolet light and an arrangement of specimen holders or supports placed at an equal distance from the light source. 3.2 Cabinet The cabinet shall be designed so that all exposed test pieces can be positioned at equal distances from the lamp. NOTE A cylindrical cabinet with the lamp placed ver

34、tically in the centre, or a cabinet of rectangular cross-section with the lamp placed horizontally above a support on which the test pieces are placed, is suitable. Increasing the test temperature increases the rate of fading of the test pieces and their surface temperature in the test cabinet shall

35、 not be allowed to exceed 100 C during any part of the test. In some cases, this will require the cabinet and test pieces to be cooled by means of a suitable fan. Care shall be taken to avoid over-cooling the lamp itself as this may affect the arc, and the lamp manufacturers advice on this aspect sh

36、ould be followed. WARNING The cabinet shall be totally enclosed or suitably baffled to eliminate any possibility of ultraviolet light escaping, since certain ultraviolet wavelengths can damage the eyes. A micro-switch shall be fitted to the opening part of the cabinet, such that the light source is

37、automatically switched off when the cabinet is opened. Many ultraviolet light sources produce ozone under the conditions of testing (see 3.3) and this can also constitute a health hazard. If ozone is produced by the action of the lamp, it is desirable to have EN ISO 6581:2010 (E) DIN EN ISO 6581:201

38、0-12 5 forced air circulation and it is essential that the air from the cabinet is ducted to a point outside the building. If in doubt, consult the manufacturer. 3.3 Ultraviolet light source The ultraviolet lamp shall be a medium-pressure mercury arc-lamp with a silica envelope, controlled by a suit

39、able transformer and switch. The lamp shall not be glass shielded, as this would eliminate most of the ultraviolet light. The power of the lamp and its arc length shall be such that the approximate intensities shown in Table 1 are recorded at a distance of 190 mm from its centre. Table 1 Approximate

40、 UV light intensities at 190 mm from the centre of the lamp Wavelength nm Intensity W/cm2254 500 to 150 265 800 to 400 297 600 to 400 303 1 000 to 800 313 1 350 to 1 200 365 1 500 to 1 700 405 800 to 1 000 436 1 300 to 1 600 NOTE A convenient arrangement has been found to be a 500 W lamp with an eff

41、ective arc length of 120 mm, placed at a distance of approximately 190 mm from the specimens. Most lamps have a recommended life of about 1 000 h and during use there will be a decrease in output, especially at wavelengths below 313 nm. It is therefore desirable to use an intensity regulator for the

42、 lamp, which will compensate, to some extent, for this decrease. Care should be taken to avoid handling the silica envelope of the lamp as this can cause it to devitrify. Although ozone has little effect on the test results, it is desirable that the lamp used does not produce ozone, as this avoids t

43、he necessity for ducting the air outside. 3.4 Specimen arrangement The apparatus shall be arranged so that specimens can be placed in suitable holders or on a suitable support and are equidistant from the light source. Care shall be taken to ensure that the specimens are not shielded from the light

44、source, by the supporting column for the lamp or by glass. 4 Procedure 4.1 General Expose the specimens to ultraviolet light in the cabinet (see 3.2) until the colour change on either the test piece or the control specimen reaches a predetermined level, as agreed between the customer and the anodize

45、r. EN ISO 6581:2010 (E) DIN EN ISO 6581:2010-12 6 NOTE The time of exposure required depends upon the apparatus used and the coloured anodized finish being assessed. This test is severe by comparison with other light-fastness tests, and most coloured anodized finishes will show significant colour ch

46、anges in exposure times of less than 100 h. In order to facilitate the detection of colour changes, partly mask the exposed surface of the specimens by a material opaque to ultraviolet light. 4.2 Control specimens Because of the severity of the test and the fact that it is intended to be used for co

47、mparative purposes, it is preferable to use standard coloured anodized specimens of known ultraviolet light resistance for control purposes. Expose any control specimens with the test pieces and partly mask these in a similar way. 4.3 Effect of ozone production The presence of ozone has very little

48、effect on the colour change of coloured anodized specimens. However, if a light surface bloom forms on the surface of specimens tested in an ozone-containing atmosphere, remove this with a mild abrasive cleaner before specimen evaluation. 5 Expression of results Record the exposure time required for

49、 the colour change of either the test piece or the control specimen to reach the predetermined level agreed between the customer and the anodizer. 6 Test report The test report shall contain at least the following information: a) a reference to this International Standard; b) the type and identification of the product tested; c) the colour and, where known, the method of production of the test piece; d) the control specimen used; e) details of apparatus used and time(s) of exposure (see Clause 3); f) the colour