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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12373-11:2001 The E
2、uropean Standard EN 12373-11:2000 has the status of a British Standard ICS 25.220.20; 77.120.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Aluminium and aluminium alloys Anodizing Part 11: Measurement of specular reflectance and specular gloss of anodic oxidation coatings
3、 at angles of 208, 458, 608, and 858 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of th
4、e Standards Committee and comes into effect on 15 February 2001 BSI 02-2001 ISBN 0 580 36827 0 BS EN 12373-11:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12373-11:2000. It supersedes BS 6161-12:1
5、987 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee STI/32, Anodic oxidation coatings on aluminium, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretatio
6、n, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which imple
7、ment international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport t
8、o include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover,
9、 the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORM
10、E EUROPENNE EUROPISCHE NORM EN 12373-11 August 2000 ICS 25.220.20; 77.120.10 English version Aluminium and aluminium alloys Anodizing Part 11: Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20, 45, 60 or 85 Aluminium et alliages daluminium Anodisatio
11、n Partie 11: Mesurage des caractristiques de rflectance et de brillant spculaires des couches anodiques angles fixes de 20, 45, 60 ou 85 Aluminium und Aluminiumlegierungen Anodisieren Teil 11: Messung des gerichteten Reflexionsgrades und des Spiegelglanzes von anodisch erzeugten Oxidschichten bei Wi
12、nkeln von 20, 45, 60 oder 85 This European Standard was approved by CEN on 27 July 2000. 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 lis
13、ts and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 respo
14、nsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Net
15、herlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means res
16、erved worldwide for CEN national Members. Ref. No. EN 12373-11:2000 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12373-11:2000 BSI 02-2001 Contents Page Foreword 3 Introduction 4 1Scope 4 2Terms and definitions 4 3Principle 5
17、4Apparatus 5 5Optical standards 11 6Preparation and calibration of apparatus 12 7Measurement of specular reflectance and specular gloss 12 8Expression of results 16 9Test report 16 Annex A (normative) Specular reflectance and specular gloss of black glass 17 Bibliography 18 Licensed Copy: sheffieldu
18、n sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12373-11:2000 BSI 02-2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 132, Aluminium and aluminium alloys, the secretariat of which is held by AFNOR. This European Standard
19、 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2001, and conflicting national standards shall be withdrawn at the latest by February 2001. It is based upon ISO 7668:1986. In this standard, annex A is normativ
20、e. EN 12373, Aluminium and aluminium alloys Anodizing, comprises the following parts: Part 1:Method for specifying decorative and protective anodic oxidation coatings on aluminium. Part 2:Determination of mass per unit area (surface density) of anodic oxidation coatings Gravimetric method Part 3:Det
21、ermination of thickness of anodic oxidation coatings Non-destructive measurement by split beam microscope Part 4:Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test with prior acid treatment Part 5:Assessment of quality of sealed anodic oxidation coatin
22、gs by measurement of admittance Part 6:Assessment of quality of sealed anodic oxidation coatings by measurement of the loss in mass after immersion in phosphoric acid/chromic acid solution without prior acid treatment Part 7:Assessment of quality of sealed anodic oxidation coatings by measurement of
23、 the loss in mass after immersion in phosphoric acid/chromic acid solution with prior acid treatment Part 8:Determination of the comparative fastness to ultra-violet light and heat of coloured anodic oxidation coatings Part 9:Measurement of wear resistance and wear index of anodic oxidation coatings
24、 using an abrasive wheel wear test apparatus Part 10:Measurement of mean specific abrasion resistance of anodic oxidation coatings using an abrasive jet test apparatus Part 11:Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20, 45, 60 or 85 Part 12:Me
25、asurement of reflectance characteristics of aluminium surfaces using integrating-sphere instruments Part 13:Measurement of reflectivity characteristics of aluminium surfaces using a goniophotometer or an abridged goniophotometer Part 14:Visual determination of image clarity of anodic oxidation coati
26、ngs Chart scale method Part 15:Assessment of resistance of anodic oxidation coadugs to cracking by deformation Part 16:Check for continuity of thin anodic oxidation coatings Copper sulfate test Part 17:Determination of electric breakdown potential Part 18:Rating system for the evaluation of pitting
27、corrosion Chart method Part 19:Rating system for the evaluation of pitting corrosion Grid method According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark
28、, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12373-11:2000 BSI 02-2001 In
29、troduction Specular reflectance and specular gloss are not unique physical properties of a surface. They vary with the angle of measurement, and with the aperture dimensions that define the incident and the reflected beams, such that measurements of these properties are not independent of the appara
30、tus being used. The specular reflectance of most surfaces increases with the angle of measurement and accounts for the use of reflectometers with various angles as, for example, for painted surfaces. The specular reflectance characteristics of anodized aluminium, however, do not always behave in the
31、 normal manner and, because of its property of double reflection, reflected light comes partly from the film surface and partly from the underlying metal. It is advisable to measure the specular reflectance characteristics at 20, 45, 60 and 85 to obtain a complete understanding of the specular refle
32、ctance properties of the anodized surface, and careful thought should be given to which method or methods are most relevant in any particular situation. The specular reflectance of bright-anodized aluminium with a mirror finish is best measured using 45 or 20 geometry. 1 Scope This part of this Euro
33、pean Standard specifies methods for the measurement of specular reflectance and specular gloss of flat samples of anodized aluminium using geometries of 20 (Method A), 45 (Method B), 60 (Method C) and 85 (Method D), and of specular reflectance by an additional 45 method (Method E) employing a narrow
34、 acceptance angle. The methods described are intended mainly for use with clear anodized surfaces. They can be used with colour-anodized aluminium, but only with similar colours. 2 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 2.1 specular reflec
35、tance ratio of the luminous flux, reflected in the specular direction for a specified source and receptor angle, to the luminous flux of the incident light, normally expressed as a percentage 2.2 specular gloss ratio of the luminous flux, reflected from an object in the specular direction for a spec
36、ified source and receptor angle, to the luminous flux reflected from glass with a refractive index of 1,567 in the specular direction NOTE To set the specular gloss scale, polished black glass with a refractive index of 1,567 is assigned the value of 100 for geometries of 20, 45, 60 and 85 (see Tabl
37、e 5). The phenomenon of light reflectance by anodized aluminium is very different to that of black glass and the choice of a black glass standard is arbitrary and made to allow comparison of different qualities of anodized aluminium. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GM
38、T+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12373-11:2000 BSI 02-2001 3 Principle The specular reflectance and specular gloss of anodized aluminium surfaces are measured under defined conditions using, as required, geometries of 20, 45, 60 or 85. 4 Apparatus 4.1 Components The apparatus consi
39、sts of: a) a polychromatic light source and housing with a lens that directs a parallel, or very slightly converging, beam of light onto the surface under test; b) means for locating the specimen surface in the correct position for measurement; c) a receptor housing containing a lens, a receptor ape
40、rture and a photoelectric cell to receive the cone of reflected light; d) a sensitivity control for setting the photocell current to any desired value on the instrument scale or digital indicator. NOTE Since specular reflection is in general spectrally non-selective, the spectral characteristics of
41、the light source and the detector need not be critically controlled for the measurement of normal uncoloured anodized surfaces. Approximate comparisons between surfaces of the same colour can be made, but an accurate measurement will require the combination of light source, photoelectric cell and as
42、sociated colour filters to give a spectral sensitivity, approximating to the CIE photopic luminous efficiency function, weighted for CIE standard illuminant C (see CIE 38:1977). 4.2 Geometric conditions The incident angle 1, which is the angle between the axis of the incident beam and the perpendicu
43、lar to the surface under test, shall have the following values and tolerances: for Method A: 20 ? 0,1; for Method B: 45 ? 0,1; for Method C: 60 ? 0,1; for Method D: 85 ? 0,1; for Method E: 45 ? 0,1 . Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (
44、c) BSI Page 6 EN 12373-11:2000 BSI 02-2001 The axis of the receptor shall, as far as possible, coincide with the mirror image of the axis of the incident beam; the receptor angle 2, which is the angle between the axis of the receptor and the perpendicular to the surface under test, shall for all met
45、hods be such that: ?1 , 0 21 With a flat piece of polished glass or other front-surface mirror in the test panel position, an image of the source shall be formed at the centre of the receptor aperture. The width of the illuminated area of the test panel shall be not less than 10 mm. The angular dime
46、nsions of the receptor apertures shall be measured from the receptor lenses. The dimensions and tolerances of the sources and receptors shall be as indicated in Tables 1 and 2. Figures 1, 2 and 3 give generalized illustrations of the dimensions. Table 1 gives both angles and corresponding dimensions
47、 calculated for lenses of a focal length of 50 mm for Methods A, B, C and D. Table 2 gives the angles and aperture dimensions for Method E. The angles are mandatory and the aperture sizes have been calculated from the corresponding angle ? as 2f(tan ?/2), where f is the focal length of the receptor lens. 4.3 Vignetting There shall be no vignetting of rays