1、BRITISH STANDARDBS EN ISO 2808:2007 BS 3900-C5:2007Paints and varnishes Determination of film thicknessThe European Standard EN ISO 2808:2007 has the status of a British StandardICS 87.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51
2、g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 2808:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50319 1National forewordThis British Standard was
3、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 It supersedes BS EN ISO 2808:2001 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on STI/10 can be obtained on reques
4、t 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 British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEURO
5、PEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2808February 2007ICS 87.040 Supersedes EN ISO 2808:1999 English VersionPaints and varnishes - Determination of film thickness (ISO2808:2007)Peintures et vernis - Dtermination de lpaisseur du feuil(ISO 2808:2007)Beschichtungsstoffe - Bestimmung der Sc
6、hichtdicke (ISO2808:2007)This European Standard was approved by CEN on 16 December 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists
7、 and bibliographical references concerning such nationalstandards 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 translationunder the responsi
8、bility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland,
9、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart
10、, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 2808:2007: EForeword This document (EN ISO 2808:2007) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Techn
11、ical 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 national standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting national standards shall be
12、withdrawn at the latest by August 2007. This document supersedes EN ISO 2808:1999. 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, Cyprus, Czech Republic, Den
13、mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 2808:2007 has been approved b
14、y CEN as EN ISO 2808:2007 without any modifications. EN ISO 2808:2007Reference numberISO 2808:2007(E)INTERNATIONAL STANDARD ISO2808Fourth edition2007-02-01Paints and varnishes Determination of film thickness Peintures et vernis Dtermination de lpaisseur du feuil EN ISO 2808:2007ii iiiContents Page F
15、oreword. v Introduction . vi 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Determination of wet-film thickness . 3 4.1 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 gaug
16、e 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 By 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 therm
17、al 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 application . 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 G
18、ravimetric 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 methods 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 Magne
19、tic 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 2808:2007iv 5.5.5 Method 7A Magnetic pull-off gauge 21 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 gauge 23 5.6 Radiol
20、ogical 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 method 25 5.7 Photothermal method . 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 Acou
21、stic 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 gauge 28 6 Determination of thickness of uncured 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 Gener
22、al . 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 gauge . 30 6.3.5 Method 12B Eddy-current gauge 31 6.4 Photothermal method . 31 6.4.1 Principle . 31 6.4.2 Field of a
23、pplication . 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 materials 33 7.3 Procedure. 33 7.3.1 Verification. 33 7.3.2 Measurement . 33 7.3.3 Number of readings 33 8 Test repo
24、rt 33 Annex A (informative) Overview of methods. 35 Bibliography . 38 EN ISO 2808:2007vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out t
25、hrough 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 liaison with ISO, also take part in the work. ISO colla
26、borates 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 technical committees is to prepare International Sta
27、ndards. 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 drawn to the possibility that some of the elements o
28、f 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 varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This fourth edition ca
29、ncels 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) determination of wet-film thickness; 2) determination of dry-film thickness; 3) determination of the
30、 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 has been deleted as such instruments are no longer manufactured. EN ISO 2808:2007vi Introduction
31、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 the instrument (an accuracy check performed by the user at regular intervals, typically before each s
32、eries 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 this would mean zeroing it on the uncoated surface, using devices of known thickness such as shims, o
33、r using a coated specimen of known film thickness; d) measurement. EN ISO 2808:20071Paints and varnishes Determination of film thickness 1 Scope This International Standard describes a number of methods that are applicable to the measurement of the thickness of coatings applied to a substrate. Metho
34、ds 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. Otherwise the method is described in detail. An overview on the methods is given in Annex A, in which the field of app
35、lication, existing standards and the precision are specified for the individual methods. This International Standard also defines terms concerning the determination of film thickness. 2 Normative references The following referenced documents are indispensable for the application of this document. Fo
36、r 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 Specifications (GPS) Dimensional measuring equipment Design and metrological characteristics of mechanical dial g
37、auges 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 paints and related products Surface roughness characteristics of blast-cleaned steel substrates Part 1: Specificat
38、ions 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 definitions given in ISO 4618 and the following apply. 3.1 substrate surface to which a coating material is applied
39、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 2808:20072 3.3 film thickness distance between the surface of the film and the surface of the substrate 3.4 wet-film thickness thickne
40、ss 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 thickness of uncured powder layer thickness of a freshly applied coating material in powder form, measured imm
41、ediately 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 serviceability and/or appearance 3.8 test area1)representative part of the relevant surface area within which an agreed numbe
42、r 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 thickness found on the relevant surface area of a particular test specimen 3.11 maximum local film thickness1)highest
43、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 in the test area or the result of a gravimetric determination of the thickness 3.13 calibration controlled and docum
44、ented process of measuring traceable calibration standards and verifying that the results are within the stated accuracy of the measurement instrument NOTE Initial calibration is typically performed by the instrument manufacturer or by a qualified laboratory in a controlled environment using a docum
45、ented 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 the resultant measurement are less than the stated accuracy of the instrument. 1) Measurement of this property is only
46、 required for the extended evaluation of film thickness measurements; see Clause 8 (test report), items k) and l). EN ISO 2808:200733.14 verification accuracy check performed by the user using reference standards 3.15 reference standard specimen of known thickness against which a user can verify the
47、 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 may be used as a thickness standard for a particular job. 3.16 adjustment act of aligning the measurement instruments thi
48、ckness 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 coating or of the shim is known. 3.17 accuracy consistency between a measured value and the true value of the thickness
49、 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 Figures 2 and 3) by another part of the instrument. The wet-film thickness is the height difference between th
