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1、BRITISH STANDARD BS EN ISO 2808:2007 BS 3900-C5:2007 Paints and varnishes Determination of film thickness The European Standard EN ISO 2808:2007 has the status of a British Standard ICS 87.040 ? -,-,- BS EN ISO 2808:2007 This British Standard was published under the authority of the Standards Policy
2、 and Strategy Committee on 30 March 2007 BSI 2007 ISBN 978 0 580 50319 1 National foreword This British Standard was published by BSI. It is the UK implementation of EN ISO 2808:2007. It supersedes BS EN ISO 2808:2001 which is withdrawn. The UK participation in its preparation was entrusted to Techn
3、ical Committee STI/10, Test methods for paints. A list of organizations represented on STI/10 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Bri
4、tish Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2808 February 2007 ICS 87.040Supersedes EN ISO 2808:1999 English Version Paints and varnishes - Determination of film thickn
5、ess (ISO 2808:2007) Peintures et vernis - Dtermination de lpaisseur du feuil (ISO 2808:2007) Beschichtungsstoffe - Bestimmung der Schichtdicke (ISO 2808:2007) This European Standard was approved by CEN on 16 December 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
6、ch 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 Centre or to any CEN member. This European S
7、tandard 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 official versions. CEN members are the national
8、 standards bodies of Austria, Belgium, Bulgaria, Cyprus, 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 Unit
9、ed Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2808:20
10、07: E Foreword This document (EN ISO 2808:2007) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes“, the secretariat of which is held by DIN. This European Standard shall be given the status of a nation
11、al standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. This document supersedes EN ISO 2808:1999. According to the CEN/CENELEC Internal Regulations, the national stan
12、dards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P
13、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 2808:2007 has been approved by CEN as EN ISO 2808:2007 without any modifications. EN ISO 2808:2007 Reference number ISO 2808:2007(E) INTERNATIONAL STANDARD ISO 2808 Fourth edition
14、2007-02-01 Paints and varnishes Determination of film thickness Peintures et vernis Dtermination de lpaisseur du feuil EN ISO 2808:2007 ii -,-,- iii Contents Page Foreword. v Introduction. vi 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Determination of wet-film thickness. 3 4.
15、1 General. 3 4.2 Mechanical methods. 3 4.2.1 Principle. 3 4.2.2 Field of application. 3 4.2.3 General. 3 4.2.4 Method 1A Comb gauge 4 4.2.5 Method 1B Wheel gauge 5 4.2.6 Method 1C Dial gauge 6 4.3 Gravimetric method 7 4.3.1 Principle. 7 4.3.2 Field of application. 7 4.3.3 General. 7 4.3.4 Method 2 B
16、y difference in mass. 7 4.4 Photothermal method. 8 4.4.1 Principle. 8 4.4.2 Field of application. 8 4.4.3 General. 9 4.4.4 Method 3 Determination using thermal properties. 9 5 Determination of dry-film thickness . 9 5.1 General. 9 5.2 Mechanical methods. 9 5.2.1 Principle. 9 5.2.2 Field of applicati
17、on. 10 5.2.3 General. 10 5.2.4 Method 4A By difference in thickness. 11 5.2.5 Method 4B Depth gauging. 13 5.2.6 Method 4C Surface profile scanning 15 5.3 Gravimetric method 16 5.3.1 Principle. 16 5.3.2 Field of application. 16 5.3.3 General. 16 5.3.4 Method 5 By difference in mass. 16 5.4 Optical me
18、thods 17 5.4.1 Principle. 17 5.4.2 Field of application. 18 5.4.3 General. 18 5.4.4 Method 6A Cross-sectioning 19 5.4.5 Method 6B Wedge cut 20 5.5 Magnetic methods 20 5.5.1 General. 20 5.5.2 Principle. 20 5.5.3 Field of application. 20 5.5.4 General. 21 EN ISO 2808:2007 -,-,- iv 5.5.5 Method 7A Magn
19、etic pull-off gauge21 5.5.6 Method 7B Magnetic-flux gauge .22 5.5.7 Method 7C Magnetic-induction gauge .22 5.5.8 Method 7D Eddy-current gauge23 5.6 Radiological method.24 5.6.1 Principle.24 5.6.2 Field of application .24 5.6.3 General.24 5.6.4 Method 8 Beta backscatter method25 5.7 Photothermal meth
20、od.25 5.7.1 Principle.25 5.7.2 Field of application .26 5.7.3 General.26 5.7.4 Method 9 Determination using thermal properties.27 5.8 Acoustic method.27 5.8.1 Principle.27 5.8.2 Field of application .27 5.8.3 General.27 5.8.4 Method 10 Ultrasonic thickness gauge28 6 Determination of thickness of unc
21、ured powder layers.28 6.1 General.28 6.2 Gravimetric method 29 6.2.1 Principle.29 6.2.2 Field of application .29 6.2.3 General.29 6.2.4 Method 11 By difference in mass .29 6.3 Magnetic methods.29 6.3.1 Principle.29 6.3.2 Field of application .29 6.3.3 General.30 6.3.4 Method 12A Magnetic-induction g
22、auge .30 6.3.5 Method 12B Eddy-current gauge31 6.4 Photothermal method.31 6.4.1 Principle.31 6.4.2 Field of application .31 6.4.3 General.31 6.4.4 Method 13 Determination using thermal properties.31 7 Measurement of film thickness on rough surfaces.32 7.1 General.32 7.2 Apparatus and materials33 7.3
23、 Procedure.33 7.3.1 Verification.33 7.3.2 Measurement.33 7.3.3 Number of readings 33 8 Test report33 Annex A (informative) Overview of methods.35 Bibliography .38 EN ISO 2808:2007 v Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodi
24、es (ISO member bodies). The work 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
25、, governmental and non-governmental, 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 IS
26、O/IEC Directives, Part 2. The 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
27、member bodies casting a vote. 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 2808 was prepared by Technical Committee ISO/TC 35, Paints and varn
28、ishes, Subcommittee SC 9, General test methods for paints and varnishes. This fourth edition cancels and replaces the third edition (ISO 2808:1997), which has been technically revised. The main changes are as follows: a) The structure of the standard has been changed into four main clauses: 1) deter
29、mination of wet-film thickness; 2) determination of dry-film thickness; 3) determination of the thickness of uncured powder layers; and 4) measurement of film thickness on rough surfaces. b) Methods using photothermal, radiological and acoustic techniques have been added. c) The split-beam method ha
30、s been deleted as such instruments are no longer manufactured. EN ISO 2808:2007 -,-,- vi Introduction Measurement of film thickness depends on the following steps: a) calibration of the measurement instrument, typically performed by the manufacturer or by any qualified laboratory; b) verification of
31、 the instrument (an accuracy check performed by the user at regular intervals, typically before each series of measurements); c) subsequent adjustment, if necessary, of the instrument so that the thickness readings it gives match those of a specimen of known thickness. For a dry-film thickness gauge
32、 this would mean zeroing it on the uncoated surface, using devices of known thickness such as shims, or using a coated specimen of known film thickness; d) measurement. EN ISO 2808:2007 -,-,- 1 Paints and varnishes Determination of film thickness 1 Scope This International Standard describes a numbe
33、r of methods that are applicable to the measurement of the thickness of coatings applied to a substrate. Methods for determining wet-film thickness, dry-film thickness and the film thickness of uncured powder layers are described. Reference is made to individual standards where these exist. Otherwis
34、e the method is described in detail. An overview on the methods is given in Annex A, in which the field of application, existing standards and the precision are specified for the individual methods. This International Standard also defines terms concerning the determination of film thickness. 2 Norm
35、ative 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 463, Geometrical Product Spe
36、cifications (GPS) Dimensional measuring equipment Design and metrological characteristics of mechanical dial gauges ISO 3611, Micrometer callipers for external measurement ISO 4618:2006, Paints and varnishes Terms and definitions ISO 8503-1, Preparation of steel substrates before application of pain
37、ts and related products Surface roughness characteristics of blast-cleaned steel substrates Part 1: Specifications and definitions for ISO surface profile comparators for the assessment of abrasive blast-cleaned surfaces 3 Terms and definitions For the purposes of this document, the terms and defini
38、tions given in ISO 4618 and the following apply. 3.1 substrate surface to which a coating material is applied or is to be applied ISO 4618:2006 3.2 coating continuous layer formed from a single or multiple application of a coating material to a substrate ISO 4618:2006 EN ISO 2808:2007 2 3.3 film thi
39、ckness distance between the surface of the film and the surface of the substrate 3.4 wet-film thickness thickness of a freshly applied wet coating material, measured immediately after application 3.5 dry-film thickness thickness of a coating remaining on the surface when the coating has hardened 3.6
40、 thickness of uncured powder layer thickness of a freshly applied coating material in powder form, measured immediately after application and before stoving 3.7 relevant surface area1) part of an article covered or to be covered by the coating and for which the coating is essential for serviceabilit
41、y and/or appearance 3.8 test area1) representative part of the relevant surface area within which an agreed number of single measurements is made as a spot-check 3.9 measurement area1) area over which a single measurement is made 3.10 minimum local film thickness1) lowest value of the local film thi
42、ckness found on the relevant surface area of a particular test specimen 3.11 maximum local film thickness1) highest value of the local film thickness found on the relevant surface area of a particular test specimen 3.12 mean film thickness1) arithmetic mean of all the individual dry-film thicknesses
43、 in the test area or the result of a gravimetric determination of the thickness 3.13 calibration controlled and documented process of measuring traceable calibration standards and verifying that the results are within the stated accuracy of the measurement instrument NOTE Initial calibration is typi
44、cally performed by the instrument manufacturer or by a qualified laboratory in a controlled environment using a documented process. This initial calibration will normally be verified by the user at regular intervals. The standards used in the calibration are such that the combined uncertainties of t
45、he resultant measurement are less than the stated accuracy of the instrument. 1) Measurement of this property is only required for the extended evaluation of film thickness measurements; see Clause 8 (test report), items k) and l). EN ISO 2808:2007 3 3.14 verification accuracy check performed by the
46、 user using reference standards 3.15 reference standard specimen of known thickness against which a user can verify the accuracy of the measurement instrument NOTE Reference standards may be coated thickness standards, or shims. If agreed to by the contracting parties, a part of the test specimen ma
47、y be used as a thickness standard for a particular job. 3.16 adjustment act of aligning the measurement instruments thickness readings to match those of a reference standard NOTE Most electronic measurement instruments can be adjusted on a thickness standard or on a shim, where the thickness of the
48、coating or of the shim is known. 3.17 accuracy consistency between a measured value and the true value of the thickness standard 4 Determination of wet-film thickness 4.1 General Annex A gives an overview of the methods used for the determination of wet-film thickness. 4.2 Mechanical methods 4.2.1 Principle In all mechanical methods the substrate surface is contacted by part of the measurement instrument through the coating, and the surface of the coating is contacted simultaneously (see Figure 1) or subsequently (see Fig