BS EN ISO 7759-2010 Anodizing of aluminium and its alloys Measurement of reflectance characteristics of aluminium surfaces using a goniophotometer or an abridged goniophotometer《铝及.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 7759:2010Anodizing of aluminium andits alloys Measurementof reflectance characteristicsof aluminium surfaces usinga goniophotometer or anabridged goniophotometer(ISO 77

2、59:2010)BS EN ISO 7759:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 7759:2010.It supersedes BS EN 12373-13:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/32, Anodic oxidation coatings on alumin

3、ium.A list of organizations represented 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 65997 3ICS 25.220.20; 77.120.10Complia

4、nce with a British Standard cannot confer 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 E

5、N ISO 7759 September 2010 ICS 25.220.20 Supersedes EN 12373-13:2000English Version Anodizing of aluminium and its alloys - Measurement of reflectance characteristics of aluminium surfaces using a goniophotometer or an abridged goniophotometer (ISO 7759:2010) Anodisation de laluminium et de ses allia

6、ges - Mesurage des caractristiques de rflectivit des surfaces daluminium laide dun goniophotomtre normal ou simplifi (ISO 7759:2010) Anodisieren von Aluminium und Aluminiumlegierungen - Messung der Reflexionseigenschaften von Aluminiumoberflchen mit einem Goniophotometer oder mit einem vereinfachten

7、 Goniophotometer (ISO 7759:2010)This European Standard was approved by CEN on 31 August 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-dat

8、e lists 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 th

9、e responsibility 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, Gre

10、ece, 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 Managem

11、ent 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 7759:2010: EBS EN ISO 7759:2010EN ISO 7759:2010 (E) 3 Foreword The text of ISO 7759:2010 has been prepared by Technical Committe

12、e ISO/TC 79 “Light metals and their alloys“ of the International Organization for Standardization (ISO) and has been taken over as EN ISO 7759:2010 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

13、status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2011, and conflicting 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 sub

14、ject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12373-13:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement

15、this European Standard: 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, Slovenia, Spain, Sweden, Switzerl

16、and and the United Kingdom. Endorsement notice The text of ISO 7759:2010 has been approved by CEN as a EN ISO 7759:2010 without any modification. BS EN ISO 7759:2010ISO 7759:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and

17、definitions .1 4 Principle1 5 Apparatus.2 6 Preparation and calibration of apparatus .5 6.1 General conditions 5 6.2 Geometric conditions5 6.3 Spectral conditions .6 6.4 Calibration6 7 Procedure.6 8 Expression of results6 8.1 General .6 8.2 Specular reflectance Rs.6 8.3 Distinctness of reflected ima

18、ge Ri.6 8.4 Narrow-angle haze Hn.6 8.5 Wide-angle haze Hw.6 8.6 Diffuseness Rd.7 8.7 Directionality Dh.7 9 Test report7 Annex A (informative) Precision and accuracy of goniophotometers 8 Bibliography9 BS EN ISO 7759:2010ISO 7759:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International

19、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 technical committees. Each member body interested in a subject for which a technical committee has been esta

20、blished 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 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardiza

21、tion. 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 International Standards adopted by the technical committees are circulated to the member bodies for votin

22、g. 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 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such

23、patent rights. ISO 7759 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 2, Organic and anodic oxidation coatings on aluminium. This second edition cancels and replaces the first edition (ISO 7759:1983), which has been technically revised. BS EN ISO 7759:

24、2010ISO 7759:2010(E) ISO 2010 All rights reserved vIntroduction The visual appearance of metallic finishes is important commercially on metals for automotive, architectural, and other uses where these metals undergo special finishing processes to produce the desired appearance. For end-products whic

25、h use such finished metals, it is important that parts placed together have the same appearance. Specular reflectance is one of the properties measured, but additional measurements are usually required to identify adequately the appearance of any metal surface. In the method described in this Intern

26、ational Standard, several important aspects of surface appearance are identified and can be measured. Those surfaces having identical sets of numbers will normally have the same reflectance characteristics and the same appearance (see References 1, 2 and 3). BS EN ISO 7759:2010BS EN ISO 7759:2010INT

27、ERNATIONAL STANDARD ISO 7759:2010(E) ISO 2010 All rights reserved 1Anodizing of aluminium and its alloys Measurement of reflectance characteristics of aluminium surfaces using a goniophotometer or an abridged goniophotometer 1 Scope This International Standard specifies a method for the measurement

28、of the reflectance characteristics of high-gloss anodized aluminium surfaces. The method described is also suitable for the measurement of the reflectance characteristics of other high-gloss metal surfaces. The method is not suitable for diffuse-finish metal surfaces and does not measure colour. 2 N

29、ormative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. CIE 38:1977, Radiometric and

30、Photometric Characteristics of Materials and their Measurement 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 goniophotometer instrument in which specimens can be illuminated at selected angles of incidence and in which the light reflected i

31、n different directions can be measured 3.2 abridged goniophotometer goniophotometer having a fixed angle of incidence and specific fixed direction(s) at which light reflected from the specimen is measured NOTE The instrument described in this International Standard uses an angle of incidence of 30 a

32、nd directions for measurement of reflected light of 30, 30 0,3, 30 2, 30 5, and 45, although some suitable instruments can be measured only on one side of the 30 angle. 4 Principle 4.1 The visual appearance of an anodized aluminium surface is characterised by means of six different properties (see 4

33、.2 to 4.7) of the reflected light coming from a narrow-source beam incident on the surface at an angle of 30. BS EN ISO 7759:2010ISO 7759:2010(E) 2 ISO 2010 All rights reserved4.2 Specular reflectance, Rs, is measured at 30 to the specimen normal using narrow source and receiver field angles (0,50 w

34、ide, maximum in the plane of the angle of reflection). 4.3 Distinctness of reflected image, Ri, is determined from the slightly off-specular reflectance (R30 0,3) measured at 29,7 and 30,3, the instrument integrating the light received from both of these apertures. 4.4 Narrow-angle haze, Hn, is dete

35、rmined from reflectance measurements taken at angles of 28 or 32 or both, i.e. at 2 away from the specular beam (R30 2). 4.5 Wide-angle haze, Hw, is determined from reflectance measurements taken at angles of 25 or 35 or both, i.e. 5 away from the specular beam (R30 5). 4.6 Diffuseness, Rd, is deter

36、mined from a reflectance measurement taken at an angle of 45, i.e.15 away from the specular beam (R45). 4.7 Directionality, Dh, of the surface, derived from the ratio of two measurements of the narrow-angle haze, Hn, the first taken when the incident light is perpendicular to the direction of the su

37、rface texture and the second when the incident light is parallel to the surface texture, i.e. the rolling, extrusion or machining direction. 5 Apparatus 5.1 Goniophotometer or abridged goniophotometer, see Figures 1 and 2, capable of achieving the specific beam and field angles given in Table 1. The

38、 voltage regulation of the instrument shall be set to 0,01 %. NOTE Details of the precision and accuracy of goniophotometers are given in Annex A. Table 1 Dimensions of the mirror image of the source-slit, and of the receiver windows measured in the same plane (see Figures 1 and 2) Values in degrees

39、 Parameter Source-slit mirror image Specular receiver windowDistinctness-of-image receiver window Haze receiver windows Diffuseness receiver window Angle of centre of window (measured from perpendicular to specimen surface) 30,0 0,4 30,0 0,4 30,30 0,04 and 29,70 0,04 28,0 0,4 and 32,0 0,4 25,0 0,4 a

40、nd 35,0 0,4 45,0 0,4 Width (in the plane of the angle of reflection) 0,44 0,01 0,40 0,01 0, 14 0,01 0,4 0,1 0,5 0,1 2,0 0,2 Length (across the plane of the angle of reflection) 5,0 1,0 3,0 1,0 3,0 1,0 3,0 1,0 3,0 1,0 3,0 1,0 BS EN ISO 7759:2010ISO 7759:2010(E) ISO 2010 All rights reserved 3Key 1 tes

41、t piece 2 neutral density filter (for high-specularity materials) 3 source object lens 4 source slit 5 condenser lens 6 lamp aSource-arm centre-line adjustment for maximum peak (optional). bReceiver-window array centre-line adjustment for maximum peak (optional). Figure 1 Optical diagram of a typica

42、l abridged goniophotometer: general geometry of measurement (angles not to scale) BS EN ISO 7759:2010ISO 7759:2010(E) 4 ISO 2010 All rights reservedaSectional drawing from Figure 1. bCentre of reflected beam. Figure 2 Optical diagram of a typical abridged goniometer: arrangement of receiver windows

43、(not to scale) 5.2 Rotatable clamp, of the type shown in Figure 3, for flattening and positioning the specimen during measurement. BS EN ISO 7759:2010ISO 7759:2010(E) ISO 2010 All rights reserved 5Figure 3 Rotatable clamp suitable for flattening the test piece and positioning it during measurement 5

44、.3 Reflectance standards 5.3.1 Three calibrated reflectance standards shall be available. a) Aluminium evaporated onto plate glass and covered with a protective coating of silicon monoxide, and calibrated for specular reflectance and distinctness of the reflected image. The specular reflectance shal

45、l be 85 % 10 %. b) Chromium evaporated onto plate glass and covered with a protective coating of silicon monoxide and calibrated for specular reflectance and distinctness of the reflected image. The specular reflectance shall be 62 % 10 %. c) Reflecting plate with a white diffuse surface from which

46、reflected light has a substantially constant luminance over the angular range of the instrument. Where the distinctness of the reflected image is being measured, standards intermediate in reflectance and made from anodized aluminium may be useful. 5.3.2 It is essential that standards are kept clean

47、and free from scratches, as well as from contact with contaminating materials. Follow the cleaning method specified by the instrument manufacturer and check standards at regular intervals against reference standards held in reserve. 6 Preparation and calibration of apparatus 6.1 General conditions U

48、se the instrument (see 5.1) in a clean dry area free from draughts. Switch the instrument on at least 30 min before use. 6.2 Geometric conditions The direction of incidence shall be 30. The directions of view shall be opposite to the directions of incidence at angles of 30, 30 0,3, 30 2, 30 5 and 45

49、. The angular dimensions of the mirror reflected image of the source-slit in the plane of measurement, and the angular dimensions of the receiver windows in this plane of measurement, shall be as shown in Table 1. BS EN ISO 7759:2010ISO 7759:2010(E) 6 ISO 2010 All rights reserved6.3 Spectral conditions The measurement shall be made using a source of visible light with appropriate filters, such that the spectral p