EN ISO 2360-2003 en Non-conductive coatings on non-magnetic electrically conductive basis materials - Measurement of coating thickness - Amplitude-sensitive eddy current method《非磁性.pdf

1、BRITISH STANDARD BS EN ISO 2360:2003 Incorporating Corrigendum No. 1 Non-conductive coatings on non-magnetic electrically conductive basis materials Measurement of coating thickness Amplitude-sensitive eddy current method The European Standard EN ISO 2360:2003 has the status of a British Standard IC

2、S 25.220.20 BS EN ISO 2360:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 9 December 2003 BSI 22 January 2004 ISBN 0 580 43048 0 National foreword This British Standard is the official English language version of EN ISO 2360:2003. It is

3、 identical with ISO 2360:2003. It supersedes BS EN ISO 2360:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee STI/37, Methods of test for metallic and related inorganic coatings including corrosion tests, which has the responsibility to: A list of

4、organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Co

5、rrespondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. 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 does n

6、ot of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developm

7、ents and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when t

8、he document was last issued. Amendments issued since publication Amd. No. Date Comments 14983 Corrigendum No. 1 22 January 2004 Corrected EN ISO foreword EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO2360 November2003 ICS25.220.20 SupersedesENISO2360:1995 Englishversion Nonconductivecoatingson

9、nonmagneticelectrically conductivebasismaterialsMeasurementofcoatingthickness Amplitudesensitiveeddycurrentmethod(ISO2360:2003) Revtementsnonconducteurssurmatriauxdebasenon magntiquesconducteursdellectricitMesuragede lpaisseurderevtementMthodeparcourantsde Foucaultsensibleauxvariationsdamplitude(ISO

10、 2360:2003) Nichtleitendeberzgeaufnichtmagnetischen metallischenGrundwerkstoffenMessenderSchichtdicke Wirbelstromverfahren(ISO2360:2003) ThisEuropeanStandardwasapprovedbyCENon27October2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope

11、an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagema

12、debytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,N

13、etherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnati

14、onalMembers. Ref.No.ENISO2360:2003ECORRECTED20031217 Foreword Thisdocument(ENISO2360:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC107 “Metallicandotherinorganiccoatings“incollaborationwithTechnicalCommitteeCEN/TC262 “Metallicandotherinorganiccoatings“,thesecretariatofwhichisheldbyBSI. ThisEuropeanS

15、tandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyMay2004,andconflictingnationalstandards shallbewithdrawnatthelatestbyMay2004. ThisdocumentsupersedesENISO2360:1995. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorgan

16、izationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofI

17、SO2360:2003hasbeenapprovedbyCENasENISO2360:2003withoutany modifications. ENISO2360:2003 Reference number ISO 2360:2003(E)NINRETOITALAN ADNATSDR OSI 2063 Thtide driino -300251-11 Non-conductive coatings on non-magnetic electrically conductive basis materials Measurement of coating thickness Amplitude

18、-sensitive eddy current method Revtements non conducteurs sur matriaux de base non magntiques conducteurs de llectricit Mesurage de lpaisseur de revtement Mthode par courants de Foucault sensible aux variations damplitude Referecne unbmer OSI :0632)E(3002 OSI 3002INTERNATIONAL STANDARD ISO 2360 Thir

19、d edition 2003-11-15 noN-ocdnitcuve itaocsgn no nonam-gnele citllacirtcey conducitve lairetam sisab s erusaeMemnt fo itaockciht gnness Amilptude-isnesitve eddy ucerrtn emthdo veRmetstne nc noocudnetrus sur rtamixua de sabe non gamtnuqies ccudnoetrus ed llcertciM tiesuraapl ed egsisrue ed revemet tn

20、Mtdohp ear cruostna de Fcuoautl ssneibel xua variitasno admptiledu ENISO2360:2003IS:0632 O3002(E) ii ENISO2360:2003IS:0632 O3002(E) iiiContents Page Foreword iv 1 Scope 1 2 Principle. 1 3 Apparatus. 1 4 Sampling 1 5 Factors affecting measurement uncertainty 2 5.1 Coating thickness. 2 5.2 Electrical

21、properties of the basis materials 2 5.3 Basis metal thickness. 2 5.4 Edge effects. 2 5.5 Surface curvature 2 5.6 Surface roughness 3 5.7 Lift-off effect 3 5.8 Probe pressure 3 5.9 Probe tilt. 3 5.10 Temperature effects 3 5.11 Intermediate coatings. 3 6 Procedure. 4 6.1 Calibration of instruments . 4

22、 6.2 Determination 5 7 Expression of results 5 8 Measurement uncertainty. 6 9 Test report 6 Annex A (informative) Eddy current generation in a metallic conductor . 7 Annex B (normative) Test for edge effect 10 Bibliography . 11 ENISO2360:2003IS:0632 O3002(E) iv Foreword ISO (the International Organi

23、zation for Standardization) is a worldwide federation of national standards bodies (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 establishe

24、d 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

25、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 Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Pub

26、lication 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 of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent

27、 rights. ISO 2360 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 2, Test methods. This third edition cancels and replaces the second edition (ISO 2360:1982), which has been technically revised. ENISO2360:2003INTENRATIONAL TSANDADR IS:0632 O3002

28、(E)1Non-conductive coatings on non-magnetic electrically conductive basis materials Measurement of coating thickness Amplitude-sensitive eddy current method 1 Scope This International Standard describes a method for non-destructive measurements of the thickness of non- conductive coatings on non-mag

29、netic, electrically conductive (generally metallic) basis materials, using amplitude-sensitive eddy current instruments. NOTE This method can also be used to measure non-magnetic metallic coatings on non-conductive basis materials. The method is particularly applicable to measurements of the thickne

30、ss of most oxide coatings produced by anodizing, but is not applicable to all conversion coatings, some of which are too thin to be measured by this method (see Clause 6). Although theoretically, the method can be used for measurements of the thickness of coatings on magnetic basis materials, its us

31、e for this application is not recommended. In such cases, the magnetic method specified in ISO 2178 should be used. 2 Principle An eddy current probe (or integrated probe/instrument) is placed on the surface of the coating(s) to be measured, and the thickness is read from the instruments readout. 3

32、Apparatus 3.1 Probe, containing an eddy current generator and detector linked to a system capable of measuring and displaying the changes in amplitude, normally as a direct readout of coating thickness. The system may also be able to measure phase changes. NOTE 1 The probe and measuring system/displ

33、ay may be integrated into a single instrument. NOTE 2 Factors affecting measurement accuracy are discussed in Clause 5. 4 Sampling Sampling depends on the specific application and coating to be tested. The area, location and number of test specimens shall be agreed between interested parties and sha

34、ll be included in the test report (see Clause 9). ENISO2360:2003IS:0632 O3002(E) 2 5 Factors affecting measurement uncertainty 5.1 Coating thickness A measurement uncertainty is inherent in the method. For thin coatings, this measurement uncertainty (in absolute terms) is constant, independent of th

35、e coating thickness and, for a single measurement, is at least 0,5 m. For coatings thicker than 25 m, the uncertainty becomes relative to the thickness and is approximately a constant fraction of that thickness. For measuring coating thicknesses of 5 m or less, the average of several measurements sh

36、all be taken. It may not be possible to obtain the measurement uncertainty specified in Clause 8 when measuring coatings of less than 3 m in thickness. 5.2 Electrical properties of the basis materials Measurements using eddy current instruments can be affected by the electrical conductivity of the b

37、asis metal, which is a function of the composition and heat treatment of the material. The influence of electrical conductivity on the measurement varies considerably with the make and type of instrument. 5.3 Basis metal thickness For each instrument there is a critical minimum basis metal thickness

38、 above which measurements are not affected by an increase in thickness. Since this thickness depends on both the eddy current generation frequency of the probe system and the electrical properties of the basis material its value should be determined experimentally, unless otherwise specified by the

39、manufacturer. An explanation of Eddy current generation and the calculation of the required minimum basis material thickness, d min , is given in Annex A. However, in the absence of any other information, the required minimum basis material thickness, d min , can be estimated from the equation: d mi

40、n= 2,5 0where 0is the standard penetration depth of the basis material (see A.1). 5.4 Edge effects Eddy current instruments can be sensitive to abrupt changes in surface contour of test specimen. Therefore measurements made too near to an edge or corner may not be valid unless the instrument has bee

41、n specifically calibrated for such measurements (see 6.2.4 and Annex B). NOTE When compared with the phase-sensitive method of ISO 21968, the amplitude-sensitive eddy current instruments can be substantially more heavily affected by edge effects. 5.5 Surface curvature Measurements are affected by th

42、e curvature of the test specimen. This influence of curvature varies considerably with the make and type of instrument and probe, but always becomes more pronounced as the radius of curvature decreases. Measurements made on curved test specimens might not, therefore, be valid unless the instrument i

43、s specifically calibrated for the surface curvature in question, or a special probe, which compensates for surface influence, is used. ENISO2360:2003IS:0632 O3002(E) 35.6 Surface roughness Measurements are influenced by the surface topography of the basis material and of the coating. Rough surfaces

44、can cause both systematic and random errors. Random errors can be reduced by making multiple measurements, each measurement being made at a different location, and then calculating the average value of that series of measurements. If the basis material is rough, the zero of the instrument shall be c

45、hecked at several locations on a typical sample of the uncoated, rough, basis material. If no typical uncoated basis material is available, the coating of the test specimen shall be stripped, at least over part of its area, with a chemical solution that does not attack the basis material. NOTE When

46、compared with the phase-sensitive method of ISO 21968, the amplitude-sensitive eddy current measurement can be more heavily affected by basis material roughness. 5.7 Lift-off effect If the probe is not placed directly on the coating, the gap between probe and coating (“lift-off”) affects the measure

47、ment of the coating thickness. The measured thickness will be equal to the coating thickness plus the additional “lift-off” gap. Lift-off can be produced unintentionally, e.g., by the presence of foreign particles between the probe and the coating. The probe tip shall be checked frequently for clean

48、liness. 5.8 Probe pressure The pressure with which the probe is applied to the test specimen affects the instrument readings and shall therefore be made constant. This pressure effect is more noticeable when the coatings are soft. Most commercially-available instruments are supplied with constant pressure probes. 5.9 Probe tilt Unless otherwis