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

1、December 2010 Translation by DIN-Sprachendienst.English price group 11No 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).I

2、CS 25.220.20!$lg“1735968www.din.deDDIN EN ISO 7759Anodizing of aluminium and its alloys Measurement of reflectance characteristics of aluminium surfaces usinga goniophotometer or an abridged goniophotometer (ISO 7759:2010)English translation of DIN EN ISO 7759:2010-12Anodisieren von Aluminium und Al

3、uminiumlegierungen Messung der Reflexionseigenschaften von Aluminiumoberflchen mit einemGoniophotometer oder mit einem vereinfachten Goniophotometer (ISO 7759:2010)Englische bersetzung von DIN EN ISO 7759:2010-12Anodisation de laluminium et de ses alliages Mesurage des caractristiques de rflectivit

4、des surfaces daluminium laide dungoniophotomtre normal ou simplifi (ISO 7759:2010)Traduction anglaise de DIN EN ISO 7759:2010-12SupersedesDIN EN 12373-13:2000-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1712.10 DIN EN ISO 775

5、9:2010-12 2 A comma is used as 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

6、 Technical Committee CEN/TC 132 “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 Committ

7、ee NA 066-01-09 AA Anodisch oxidiertes Aluminium. Amendments This standard differs from DIN EN 12373-13:2000-12 as follows: a) the standard has been taken over as DIN EN ISO 7759:2010-12 (the main title has been adapted), see National Annex NA; b) the standard has been editorially revised. Previous

8、editions DIN EN 12373- 3: 1 2000-12DIN EN ISO 7759:2010-12 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

9、EN 12373 DIN EN ISO Part 1 7599 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 Determination of thickness of anodic oxidatio

10、n coatings Non-destructive 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 Par

11、t 6 Part 7 3210 Assessment 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 Determination of the comparative fastness to ultra-violet light a

12、nd heat of coloured anodic 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

13、 or 85 degrees Part 12 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 cha

14、nged Part 14 10215 Visual 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

15、 Determination of electric 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 21286581DIN EN ISO 7759:2010-12 4 This page is intention

16、ally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 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 goniophotom

17、eter (ISO 7759:2010) Anodisation de laluminium et de ses alliages - 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 Aluminiumobe

18、rflchen mit einem Goniophotometer oder mit einem vereinfachten 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 s

19、tatus 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 to any CEN member. This European Standard exists in three official versions (English, French, German)

20、. 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 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, C

21、zech Republic, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT E

22、UROPEN 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 CEN national Members. Ref. No. EN ISO 7759:2010: EContents EN ISO 7759:2010 (E) DIN EN ISO 7759:2010-12

23、2 Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle5 5 Apparatus .6 6 Preparation and calibration of apparatus .9 6.1 General conditions 9 6.2 Geometric conditions9 6.3 Spectral conditions10 6.4 Calibration 10 7 Procedure .10 8 Expression of res

24、ults 10 8.1 General10 8.2 Specular reflectance Rs.10 8.3 Distinctness of reflected image Ri10 8.4 Narrow-angle haze Hn10 8.5 Wide-angle haze Hw.10 8.6 Diffuseness Rd11 8.7 Directionality Dh.11 9 Test report 11 Annex A (informative) Precision and accuracy of goniophotometers.12 Bibliography 13 Forewo

25、rd The text of ISO 7759:2010 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 ISO 7759:2010 by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys” the secretariat of

26、 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 conflicting national standards shall be withdrawn at the latest by March 2011. Attention is drawn to the po

27、ssibility 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 supersedes EN 12373-13:2000. According to the CEN/CENELEC Internal Regulations, the national standar

28、ds 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol

29、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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. “ DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 3 Introduction The visual appearance of

30、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 which use such finished metals, it is important that parts placed together have the same appe

31、arance. 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 International Standard, several important aspects of surface appearance are identified and can

32、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). DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 4 1 Scope This International Standard specifies a method for the measurement of the r

33、eflectance 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 Normative

34、 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 Photomet

35、ric 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 in differ

36、ent 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 and direc

37、tions 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 4.2 to 4.

38、7) of the reflected light coming from a narrow-source beam incident on the surface at an angle of 30. DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 5 4.2 Specular reflectance, Rs, is measured at 30 to the specimen normal using narrow source and receiver field angles (0,50 wide, maximum in the plane o

39、f 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 determined from reflectance mea

40、surements 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 determined from a reflectance me

41、asurement 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 surface texture and the secon

42、d 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 voltage regulation of the

43、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 Parameter Source-slit mirr

44、or 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 and 35,0 0,4 45,0 0,4 Width

45、(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 DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 6 Key 1 test piece 2 neutral density filter (for high-spe

46、cularity 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 typical abridged goniophotometer: general geometry o

47、f measurement (angles not to scale) DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 7 aSectional drawing from Figure 1. bCentre of reflected beam. Figure 2 Optical diagram of a typical abridged goniometer: arrangement of receiver windows (not to scale) 5.2 Rotatable clamp, of the type shown in Figure 3

48、, for flattening and positioning the specimen during measurement. DIN EN ISO 7759:2010-12 EN ISO 7759:2010 (E) 8 Figure 3 Rotatable clamp suitable for flattening the test piece and positioning it during measurement 5.3 Reflectance standards 5.3.1 Three calibrated reflectance standards shall be avail

49、able. 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 shall 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 re