DIN EN ISO 2128-2010 Anodizing of aluminium and its alloys - Determination of thickness of anodic oxidation coatings - Non-destructive measurement by split-beam microscope (ISO 212.pdf

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1、December 2010 Translation by DIN-Sprachendienst.English price group 7No 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).IC

2、S 25.220.20!$lh“1735969www.din.deDDIN EN ISO 2128Anodizing of aluminium and its alloys Determination of thickness of anodic oxidation coatings Non-destructive measurement by split-beam microscope(ISO 2128:2010)English translation of DIN EN ISO 2128:2010-12Anodisieren von Aluminium und Aluminiumlegie

3、rungen Bestimmung der Dicke von anodisch erzeugten Oxidschichten Zerstrungsfreie Messung mit Lichtschnittmikroskop (ISO 2128:2010)Englische bersetzung von DIN EN ISO 2128:2010-12Anodisation de laluminium et de ses alliages Dtermination de lpaisseur des couches anodiques Mthode non destructive par mi

4、croscope coupe optique (ISO 2128:2010)Traduction anglaise de DIN EN ISO 2128:2010-12SupersedesDIN EN 12373-3:1999-04www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1012.10 DIN EN ISO 2128:2010-12 2 A comma is used as the decimal ma

5、rker. 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 Technical Committee CEN/TC 132 “Aluminium an

6、d 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 Committee NA 066-01-09 AA Anodisch oxidiertes Alumin

7、ium. Amendments This standard differs from DIN EN 12373-3:1999-04 as follows: a) the standard has been taken over as DIN EN ISO 2128:2010-12 (the main title has been adapted), see National Annex NA; b) the standard has been editorially revised. Previous editions DIN 50948: 1969-05, 1980-04 DIN EN 12

8、373-3: 1999-04 DIN EN ISO 2128:2010-12 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 EN 12373 DIN EN ISO

9、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 2128 Determination of thickness of anodic oxidation coatings Non-

10、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 Part 6 Part 7 3210

11、 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 and heat of colo

12、ured 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 or 85 degrees

13、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 changed Part 14 10

14、215 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 Determination

15、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 Anodizingofaluminiumanditsalloys6581DIN EN ISO 2128:2010-12 4 This page is intentionally blank EUROPEAN STAND

16、ARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2128 September 2010 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

17、 laluminium et de ses alliages - Dtermination de lpaisseur 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 Lichtsch

18、nittmikroskop (ISO 2128:2010) 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-date

19、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 the

20、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, Greec

21、e, 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 Managemen

22、t 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 2128:2010: EContents DIN EN ISO 2128:2010-12 EN ISO 2128:2010 (E) 2 Page Foreword3 1 Scope 4 2 Terms and definitions .4 3 Principl

23、e4 4 Apparatus .5 5 Procedure .5 6 Expression of results 6 7 Test report 6 Foreword The text of ISO 2128:2010 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 2128:2010 by T

24、echnical 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 identical text or by endorsement, at the latest by March 2011, and conflicting national stand

25、ards 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 responsible for identifying any or all such patent rights. This document supersedes EN 12373

26、-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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland

27、, 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 2128:2010 has been approved by CEN as a EN ISO 2128:2010 without any modification. “ DIN E

28、N ISO 2128:2010-12 EN ISO 2128:2010 (E) 3 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 microscope. The method is applicable, in most industrial cases, to anodic oxidati

29、on 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 in the case of opaque or dark-coloured coatings. NOTE Problems can arise as a resu

30、lt 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 measured at not less than 10 points of an inspection area 2.2 inspection area part

31、 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 45, onto the anodized surface (see Figure 1). DIN EN ISO 2128:2010-12 EN ISO 2128:2

32、010 (E) 4 Key 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 after reflection at the metal/coating interface and two resulting refractions. Two parallel lines ar

33、e 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 the coating, n, which lies between 1,59 and 1,62, and on the geometry of the apparatus. When the angl

34、e 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 true thickness; e is the measured apparent thickness. NOTE The use of e = 2e provides adequate accura

35、cy. 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 measuring the thickness of transparent coatings or surface roughness. The calibration of the microscope shall

36、 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 instructions provided with the apparatus. The inspection area should be agreed between the supplier and t

37、he customer. DIN EN ISO 2128:2010-12 EN ISO 2128:2010 (E) 5 Measure the coating thickness by means of a graticule moved from one line to another by a vernier tube graduated in micrometres. NOTE In certain types of apparatus, the magnification can be selected so that the reading on the tube correspon

38、ds 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 the surface examined. Exclude from the calibration any anomalous values deviating by more than 10 % from the arithmetic

39、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 measurements. If the repeated measurements give anomalous values, add to the expression of the mean value, ,x the indication of

40、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; 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. DIN EN ISO 2128:2010-12 EN ISO 2128:2010 (E) 6