1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 2128:2010Anodizing of aluminium andits alloys Determination ofthickness of anodic oxidationcoatings Non-destructivemeasurement by split-beammicroscope (ISO 2128:2010)BS
2、 EN ISO 2128:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 2128:2010.It supersedes BS EN 12373-3:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/32, Anodic oxidation coatings on aluminium.A list
3、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 65994 2ICS 25.220.20Compliance with a British Sta
4、ndard 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 EN ISO 2128 September 2
5、010 ICS 25.220.20 Supersedes EN 12373-3:1998English Version Anodizing of aluminium and its alloys - Determination of thickness of anodic oxidation coatings - Non-destructive measurement by split-beam microscope (ISO 2128:2010) Anodisation de laluminium et de ses alliages - Dtermination de lpaisseur
6、des couches anodiques - Mthode non destructive par microscope coupe optique (ISO 2128:2010) Anodisieren von Aluminium und Aluminiumlegierungen - Bestimmung der Dicke von anodisch erzeugten Oxidschichten - Zerstrungsfreie Messung mit Lichtschnittmikroskop (ISO 2128:2010) This European Standard was ap
7、proved 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-date lists and bibliographical references concerning such nation
8、al 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 responsibility of a CEN member into its own language and no
9、tified 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
10、embourg, 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 Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All ri
11、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2128:2010: EBS EN ISO 2128:2010EN ISO 2128:2010 (E) 3 Foreword The text of ISO 2128:2010 has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys“ of the Internatio
12、nal Organization for Standardization (ISO) and has been taken over as EN ISO 2128:2010 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 status of a national standard, either by publication of an id
13、entical 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 subject of patent rights. CEN and/or CENELEC shall not be held r
14、esponsible for identifying any or all such patent rights. This document supersedes EN 12373-3:1998. 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, C
15、yprus, 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, Switzerland and the United Kingdom. Endorsement notice The text of ISO
16、 2128:2010 has been approved by CEN as a EN ISO 2128:2010 without any modification. BS EN ISO 2128:2010ISO 2128:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wo
17、rk 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 established has the right to be represented on that committee. International organizations, governmental and non-governm
18、ental, in liaison 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
19、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 voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
20、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 patent rights. ISO 2128 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee S
21、C 2, Organic and anodic oxidation coatings on aluminium. This second edition cancels and replaces the first edition (ISO 2128:1976), which has been technically revised. BS EN ISO 2128:2010BS EN ISO 2128:2010INTERNATIONAL STANDARD ISO 2128:2010(E) ISO 2010 All rights reserved 1Anodizing of aluminium
22、and its alloys Determination of thickness of anodic oxidation coatings Non-destructive measurement by split-beam microscope 1 Scope This International Standard specifies a non-destructive method for determining the thickness of anodic oxidation coatings on aluminium and its alloys using a split-beam
23、 microscope. The method is applicable, in most industrial cases, to anodic oxidation coatings above 10 m, or above 5 m when the surface is smooth. The use of the method specified is limited by the need for the two luminous lines described in Clause 3 to be visible and distinctly separated, i.e. not
24、in the case of opaque or dark-coloured coatings. NOTE Problems can arise as a result of the roughness of the surface. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 thickness of an anodic oxidation coating arithmetic mean of the thicknesses
25、measured at not less than 10 points of an inspection area 2.2 inspection area part of the surface on which the specified properties are required to be measured 3 Principle A parallel, lamellar beam of light (I) in a split-beam microscope is directed obliquely, generally at an angle of incidence of 4
26、5, onto the anodized surface (see Figure 1). BS EN ISO 2128:2010ISO 2128:2010(E) 2 ISO 2010 All rights reservedKey 1 oxidation coating 2 metal Figure 1 Diagram of optical path A part of this beam, R1, is reflected at the outer face of the coating; another part, R2, penetrates the coating and emerges
27、 after reflection at the metal/coating interface and two resulting refractions. Two parallel lines are obtained at the ocular, the distance between these being proportional to the thickness of the oxidation coating and to the magnification. This distance is also dependent on the refractive index of
28、the coating, n, which lies between 1,59 and 1,62, and on the geometry of the apparatus. When the angle of incidence and the optical axis of the objective lens of the measuring apparatus are both at 45, the thickness is given by Formula (1): 221e e n=, or e = 2,04 e, approximately (1) where e is the
29、true thickness; e is the measured apparent thickness. NOTE The use of e = 2e provides adequate accuracy. Some instruments are calibrated in such a way that they give the actual thickness, e, rather than the apparent thickness, e. 4 Apparatus 4.1 Split-beam microscope, specially designed for measurin
30、g the thickness of transparent coatings or surface roughness. The calibration of the microscope shall be checked using an anodized aluminium sample, the anodic oxidation coating thickness of which has been determined by the micrographic section method. 5 Procedure Proceed in accordance with the inst
31、ructions provided with the apparatus. The inspection area should be agreed between the supplier and the customer. BS EN ISO 2128:2010ISO 2128:2010(E) ISO 2010 All rights reserved 3Measure the coating thickness by means of a graticule moved from one line to another by a vernier tube graduated in micr
32、ometres. NOTE In certain types of apparatus, the magnification can be selected so that the reading on the tube corresponds to the true thickness of the coating. 6 Expression of results Calculate the thickness of the coating as the arithmetic mean of measurements carried out on at least 10 points on
33、the surface examined. Exclude from the calibration any anomalous values deviating by more than 10 % from the arithmetic mean, and replace each anomalous value, once only, by the values obtained from two further measurements. Such anomalous values shall not exceed 30 % of the total number of measurem
34、ents. If the repeated measurements give anomalous values, add to the expression of the mean value, ,x the indication of the mean deviation given by Formula (2): _1()nxxn(2) 7 Test report The test report shall include at least the following information: a) a reference to this International Standard;
35、b) the type and identification of the product tested; c) the result of the test (see Clause 6); d) where appropriate, the mean deviation for anomalous values; e) anything unusual noticed during the determination; f) the date of the test. This page deliberately left blankThis page deliberately left b
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