1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 10215:2010Anodizing of aluminium and itsalloys Visual determinationof image clarity of anodicoxidation coatings Chartscale method (ISO 10215:2010)BS EN ISO 10215:2010 B
2、RITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO10215:2010. It supersedes BS EN 12373-14:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/32, Anodic oxidation coatings on aluminium.A list of organizations
3、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 66158 7ICS 25.220.20Compliance with a British Standard cannot conf
4、er 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 10215 August 2010 ICS 25.220.20 S
5、upersedes EN 12373-14:2000English Version Anodizing of aluminium and its alloys - Visual determination of image clarity of anodic oxidation coatings - Chart scale method (ISO 10215:2010) Anodisation de laluminium et de ses alliages - Dtermination de la nettet dimage sur couches anodiques - Mthode de
6、s chelles gradues (ISO 10215:2010) Anodisieren von Aluminium und Aluminiumlegierungen - Visuelle Bestimmung der Abbildungsschrfe von anodisch erzeugten Oxidschichten - Messgittermethode (ISO 10215:2010) This European Standard was approved by CEN on 14 August 2010. CEN members are bound to comply wit
7、h 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 lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Ce
8、ntre 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 responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the offic
9、ial versions. 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, Slov
10、akia, Slovenia, 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
11、 for CEN national Members. Ref. No. EN ISO 10215:2010: EEN ISO 10215:2010 (E) 3 Foreword This document (EN ISO 10215:2010) has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys“ in collaboration with Technical Committee CEN/TC 132 “Aluminium and aluminium alloys” the secr
12、etariat 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 February 2011, and conflicting national standards shall be withdrawn at the latest by February 2011. Attention is
13、 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 supersedes EN 12373-14:2000. According to the CEN/CENELEC Internal Regulations, the
14、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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
15、nds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 10215:2010 has been approved by CEN as a EN ISO 10215:2010 without any modification. BS EN ISO 10215:2010BS EN ISO 10215:2010ISO 10215:2010(E) ISO 2010 Al
16、l rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle2 5 Apparatus.2 6 Test piece .4 7 Procedure.5 7.1 General .5 7.2 Determination of image clearness C .5 7.3 Determination of image distortion I.5 7.4 Determination of h
17、aze value Hn.5 8 Expression of results6 9 Test report6 Bibliography7 BS EN ISO 10215:2010ISO 10215:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparin
18、g International Standards is normally carried out through ISO 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 liai
19、son with ISO, also take part in the work. ISO collaborates closely 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 t
20、echnical committees is to prepare International Standards. Draft 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 d
21、rawn 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 patent rights. ISO 10215 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 2, Organic
22、and anodic oxidation coatings on aluminium. This second edition cancels and replaces the first edition (ISO 10215:1992), which has been technically revised. BS EN ISO 10215:2010ISO 10215:2010(E) ISO 2010 All rights reserved vIntroduction Estimation of the image clarity of anodic oxidation coatings o
23、n aluminium and its alloys is normally carried out visually by observing the clearness of an image on the surface. However, the image can be observed at various angles and can be confused with the gloss level of a surface; and while the degree of image clarity is mainly influenced by the clearness o
24、f the coating, it is also affected by image distortion caused by surface irregularities and the haziness of the coating layer. Standardized methods of determining image clarity are therefore required. This International Standard specifies the use of a chart scale based on optical combs, together wit
25、h a lightness scale to rank image clarity, and has been found to give good correlation with visual evaluation. A related International Standard (ISO 10216)specifies an instrumental method of measuring image clarity, also by using optical combs. The instrumental method provides a more accurate measur
26、ement of image clarity and should be used in cases of dispute. BS EN ISO 10215:2010BS EN ISO 10215:2010INTERNATIONAL STANDARD ISO 10215:2010(E) ISO 2010 All rights reserved 1Anodizing of aluminium and its alloys Visual determination of image clarity of anodic oxidation coatings Chart scale method 1
27、Scope This International Standard specifies a visual method for determining the image clarity of anodic oxidation coatings on aluminium and aluminium alloys, using a chart scale and a lightness scale, which are defined. The method can be applied only to flat surfaces that can reflect the image of th
28、e chart scale pattern. 2 Normative 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. ISO
29、/TR 8125:1984, Anodizing of aluminium and its alloys Determination of colour and colour difference of coloured anodic coatings 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 image clarity Cvability of the surface of an anodic oxidation coati
30、ng to produce a clear image of an object reflected in the surface NOTE In the method described in this International Standard, image clarity is represented by a symbol Cvand is expressed as a numerical unit which is calculated by taking into account the image clearness, the image distortion and the
31、haze value (see Clause 8). 3.2 image clearness C limit of visual resolution of fine details of a chart scale when reflected by a surface, given by the grade number on the chart scale NOTE Image clearness relies heavily on the roughness of the surface being measured, and the lower the roughness the c
32、learer or sharper the image becomes, i.e. the nearer the surface becomes to a perfect mirror, the clearer the image becomes. 3.3 image distortion I degree of distortion of an image caused by the waviness of a surface, given by the grade number on the chart scale BS EN ISO 10215:2010ISO 10215:2010(E)
33、 2 ISO 2010 All rights reservedNOTE Image distortion depends on the evenness of the surface being measured. The distortion occurs because part of the incident light is reflected in a direction different from that of the bulk of the light due to an uneven surface. Even if the surface is mirror-finish
34、ed, it will present a distorted image if waviness is present. 3.4 haze value Hndegree of opacity of the coating on a surface, expressed as a lightness unit NOTE Haze represents the opacity or transparency of the coating layer. Poor transparency causes absorption and scattering of normally reflected
35、light, thus reducing the clarity of the image. 4 Principle The image clarity of an anodic oxidation coating is determined by visual estimation of three properties of the coating layer: image clearness, image distortion and haze. These properties are determined by evaluating the image of a chart scal
36、e on the test pieces. 5 Apparatus 5.1 Chart scale, as shown in Figure 1, comprising a translucent plastic film or glass on which a pattern of optical combs is arranged using black and white lines with a range of specified widths (Grades 1 to 11). The light transmittance of the dark lines should be v
37、irtually zero. The widths of the black lines, and the spaces between two adjoining black lines, for each grade, are the same and the lines are perfectly parallel. The lines for Grade 1 are the widest and those for Grade 11 are the narrowest. The widths of the lines for each grade are given in Table
38、1. NOTE The widths of lines for Grades 1 to 7 form an arithmetical progression. The grades above Grade 7 are used for estimating comparatively high image clarity and Grades 7, 9 and 11 form a geometrical progression. Grade 8 is the median of Grades 7 and 9, and Grade 10 is the median of Grades 9 and
39、 11. 1 2 3 4 5 6 7 8 9 10 11Figure 1 Chart scale Table 1 Width of lines for each grade of the chart scale Grade 1 2 3 4 5 6 7 8 9 10 11 Width, mm 2,0 1,75 1,5 1,25 1,0 0,75 0,5 0,375 0,25 0,188 0,125 BS EN ISO 10215:2010ISO 10215:2010(E) ISO 2010 All rights reserved 35.2 Observation box, as shown in
40、 Figures 2 and 3, which accommodates the chart scales used. It has a window in which the scale (Grades 1 to 11) may be set, and an observation window on the other side. The window for the test pieces is at the base of the box. Dimensions in millimetres, unless otherwise indicated 4528628647024012345
41、6745a91181026Key 1 lamp box 2 chart scale 3 source of white light 4 air vent 5 lens 39,5 mm, focus 50 mm 2 mm 6 diffuser 7 power switch 8 observation window 9 test piece 10 lightness scale 11 power source aAir. Figure 2 Diagram of a typical observation box BS EN ISO 10215:2010ISO 10215:2010(E) 4 ISO
42、 2010 All rights reservedDimensions in millimetres 124347024015065Key 1 lamp box 2 chart scale 3 lightness scale 4 test piece 5 observation window 6 power switch Figure 3 Appearance of typical observation box 5.3 Lightness scale, a neutral scale which has 18 lightness chips ranging from Hn= 9,5 to H
43、n= 1,0, with a pitch of 0,5; the value of each chip is assigned according to Table 2 of ISO/TR 8125:1984. NOTE Manufacturers often use symbol V instead of Hnonlightness chips. 6 Test piece The test piece shall be visually flat and should be greater than 90 mm long by 65 mm wide. BS EN ISO 10215:2010
44、ISO 10215:2010(E) ISO 2010 All rights reserved 57 Procedure 7.1 General Image clearness, C, and image distortion, I, are determined using the chart scale (5.1) and the haze value, Hn, is determined using the lightness scale (5.3). Image clarity, Cv, is calculated from these values. 7.2 Determination
45、 of image clearness C Place the chart scale on the observation box (5.2) and put the box on the test piece. Illuminate the chart scale and observe the range of white and black lines reflected by the test piece, as illustrated in Figure 2. Establish the highest grade number for which a clear image ca
46、n be distinguished in the longitudinal and transverse directions. EXAMPLE For a test piece having high image clearness (mirror-like), the boundary of a black and a white line for Grade 11 can be clearly distinguished and the image clearness of the test piece is Grade 11. If it cannot be distinguishe
47、d clearly, observe the group of lines for the next lower grade in turn. If it can be distinguished for Grade 9, but not for Grade 10, the image clearness of the sample is Grade 9. 7.3 Determination of image distortion I After estimating the image clearness, observe the distortion in the width of the
48、 black lines and the rate the grade for longitudinal and transverse directions in a similar way to 7.2. When the line is distorted and the width of a thin portion is about half the normal width of a black line for a certain grade (see Figure 4), assign the next lower grade to this test piece. EXAMPL
49、E If the line of Grade 5 with a width of 1 mm (see Table 1) is distorted and the width of the thin portion is about half (0,5 mm) as illustrated in Figure 4, assign Grade 4, as image distortion, which is one grade lower than Grade 5. Dimensions in millimetres 0,51Figure 4 Example of distortion of image Line of Grade 5 7.4 Determination of haze value HnPlace the lightness scale in the sample position in the observation box and compare the black lines for Grade 1 with it t
