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1、BRITISH STANDARD BS EN ISO 2361:1995 Incorporating Amendment No. 1 Electrodeposited nickel coatings on magnetic and non-magnetic substrates Measurement of coating thickness Magnetic method The European Standard EN ISO 2361:1994 has the status of a British Standard Licensed Copy: sheffieldun sheffiel
2、dun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2361:1995 This British Standard, having been prepared under the direction of the Surface Coatings (other than Paints) Standards Committee, was published under the authority of the Board of BSI and comes into effect on
3、31 January 1984 BSI 03-2000 First published February 1977 First revision January 1984 The following BSI references relate to the work on this standard: Committee reference SRC/14 Draft for comment 80/55127 DC ISBN 0 580 13659 0 Committees responsible for this British Standard The preparation of this
4、 British Standard was entrusted by the Surface Coatings (other than Paints) Standards Committee (SRC/-) to Technical Committee SRC/14 upon which the following bodies were represented: Aluminium Federation Association of Manufacturers of Domestic Electrical Appliances Association of Metal Sprayers Br
5、itish Anodising Association British Industrial Fasteners Federation British Jewellers Association British Telecommunications City of London Polytechnic Department of Trade and Industry (National Physical Laboratory) Institute of Metal Finishing Institution of Corrosion Science and Technology Metal F
6、inishing Association Ministry of Defence NDT Trade Association Society of Motor Manufacturers and Traders Limited Coopted member Amendments issued since publication Amd. No.Date of issueComments 8484July 1995Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18
7、 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2361:1995 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope and field of application3 2References3 3Principle3 4Factors affecting the measuring accuracy3 5Calibration of instruments4
8、 6Procedure5 7Accuracy requirement6 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2361:1995 ii BSI 03-2000 National foreword This revised Part of BS 5411 has been prepared under the direc
9、tion of the Surface Coatings (other than Paints) Standards Committee. It is identical with the 1982 edition of ISO 2361 “Electrodeposited nickel coatings on magnetic and non-magnetic substrates Measurement of coating thickness Magnetic method”, which was prepared with the active participation and ap
10、proval of the United Kingdom, by Subcommittee 2, Methods of inspection and co-ordination of test methods, of Technical Committee 107, Metallic and other non-organic coatings, of the International Organization for Standardization (ISO). This Part of BS 5411 supersedes BS 5411-9:1977 which is now with
11、drawn. In 1994 the European Committee for Standardization (CEN) accepted ISO 2361:1982 as European Standard EN ISO 2361:1994. As a consequence of implementing the European Standard this British Standard is renumbered as BS EN ISO 2361:1995 and any reference to BS 5411-9 should read as a reference to
12、 BS EN ISO 2361:1995. This edition of BS 5411-9 differs from the previous edition in the following principal respects. a) Advice on the positioning of the instrument probe has been expanded. b) The relaxation, under certain conditions, of the accuracy requirements of the method is no longer permitte
13、d. c) The warning that strong magnetic fields can seriously interfere with the operation of instruments is now confined to those instruments which employ a stationary magnetic field. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as
14、a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the b
15、aseline as the decimal marker. Where the words “International Standard” appear, referring to this standard, they should be read as “Part of this British Standard”. The Technical Committee has reviewed the provisions of ISO 2177 to which reference is made in 5.2.1 and has decided that it is acceptabl
16、e for use in conjunction with this standard. A British Standard related to ISO 2177 is BS 5411 “Methods of test for metallic and related coatings” Part 4 “Coulometric method for the measurement of coating thickness”. Cross-references International StandardCorresponding British Standard BS 5411 Metho
17、ds of test for metallic and related coatings ISO 1463:1982Part 5:1984 Measurement of local thickness of metal and oxide coatings by the microscopical examination of cross-sections (Identical) ISO 2064:1980Part 1:1980 Definitions and conventions concerning the measurement of thickness (Identical) Lic
18、ensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2361:1995 BSI 03-2000iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicati
19、on. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN ISO title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (
20、see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sat N
21、ov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2361 January 1995 ICS 25.220.40 Descriptors: Nickel coatings, dimensional measurements, thickness English version Electrodeposited nickel coatings on magnetic and non-magnetic substrate
22、s Measurement of coating thickness Magnetic method (ISO 2361:1982) Revtements lectrolytiques de nickel sur mtal de base magntique et non magntique Mesurage de lpaisseur Mthode magntique (ISO 2361:1982) Electrolytischerzeugte Nickelschichten auf magnetischen und nichtmagnetischen Grundmetallen Messen
23、 der Schichtdicke Magnetverfahren (ISO 2361:1982) This European Standard was approved by CEN on 1994-10-03. 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 alterat
24、ion. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions. (English, French, German). A version in any other language made by transla
25、tion under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
26、 Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN ISO 2361
27、:1995 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2361:1995 BSI 03-2000 2 Foreword This European Standard has been taken over by the Technical Committee CEN/TC 262, Protection of metallic materials against corrosion, from the wo
28、rk of ISO/TC 107, Metallic and other inorganic coatings, of the International Organization for Standardization (ISO). This document was submitted to the formal vote and was adopted by CEN as a European Standard. This European Standard shall be given the status of a national standard, either by publi
29、cation of an identical text or by endorsement, at the latest by July 1995, and conflicting national standards shall be withdrawn at the latest by July 1995. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgiu
30、m, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2361:1995 BSI 03-20003 1
31、Scope and field of application This International Standard specifies the method of using coating thickness instruments of the magnetic type for non-destructive measurements of the thickness of electrodeposited nickel coatings on magnetic or non-magnetic substrates. The method may not be applicable t
32、o autocatalytic (electroless) nickel coatings depending on their chemical composition. For the purposes of this International Standard, two types of nickel coating are distinguished: a) nickel coatings on magnetic substrates (type A coatings); b) nickel coatings on non-magnetic substrates (type B co
33、atings). It should not be assumed that all instruments are applicable to both types of coating. The effective measuring ranges of instruments using the principle of magnetic attraction are up to 50 4m for type A coatings, and up to 25 4m for type B coatings. For instruments using the principle of re
34、luctance, the effective ranges are much greater and measurements up to 1 mm, or more, can be made on both types of coating. 2 References ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical method. ISO 2064, Metallic and other non-organic coatings Definitions and conv
35、entions concerning the measurement of thickness. ISO 2177, Metallic coatings Measurement of coating thickness Coulometric method by anodic dissolution1). 3 Principle Coating thickness instruments of the magnetic type measure either the magnetic attraction between a permanent magnet and the coating/s
36、ubstrate combination, or the reluctance of a magnetic flux path passing through the coating and the substrate. 4 Factors affecting the measuring accuracy2) The following factors may affect the accuracy of measurements of coating thickness. 4.1 Coating thickness The precision of a measurement changes
37、 with coating thickness depending on the instrument design. For thin coatings, the precision is constant, independent of the thickness. For thick coatings, the precision is an approximately constant fraction of the thickness. 4.2 Magnetic properties of the basis metal (type A coatings only) Thicknes
38、s measurements by the magnetic method are affected by variations in the magnetic properties of the basis metal. For practical purposes, magnetic variations in low carbon steels can be considered to be insignificant. 4.3 Basis metal thickness (type A coatings only) For each instrument, there is a cri
39、tical thickness of basis metal above which measurements will not be affected by an increase in thickness. Since it depends on the instrument probe and the nature of the basis metal, its value should be determined experimentally, unless it is specified by the manufacturer. 4.4 Edge effects The method
40、 is sensitive to abrupt changes in surface contour of the test specimen. Therefore, measurements made too near an edge or inside corner will not be valid unless the instrument is specifically calibrated for such measurements. The effect may extend up to about 20 mm from the discontinuity, depending
41、on the instrument. 4.5 Curvature Measurements are affected by the curvature of the test specimen. The influence of curvature varies considerably with the make and type of instrument, but always becomes more pronounced as the radius of curvature decreases. Instruments with two-pole probes may also pr
42、oduce different readings if the poles are aligned in planes parallel or perpendicular to the axis of a cylindrical surface. A similar effect can occur with a single-pole probe if the tip is unevenly worn. 1) At present at the stage of draft. (Revision of ISO 2177:1972.) 2) For the purpose of this In
43、ternational Standard, the measuring uncertainty is defined as that obtained with an instrument correctly calibrated and used. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:21:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2361:1995 4 BSI 03-2000 Measurements made on curved test spe
44、cimens may not, therefore, be valid unless the instrument is specifically calibrated for such measurements. 4.6 Surface roughness If the range of a series of measurements, made within the same reference area (see ISO 2064) on a rough surface, substantially exceeds the inherent repeatability of the i
45、nstrument, the number of measurements required should be increased to at least five. 4.7 Direction of mechanical working of the basis metal (type A coatings only) Measurements made by an instrument having a two-pole probe or an unevenly worn single-pole probe may be influenced by the direction in wh
46、ich the magnetic basis metal has been subjected to mechanical working (such as rolling), the reading changing with the orientation of the probe on the surface. 4.8 Residual magnetism (type A coatings only) Residual magnetism in the basis metal affects measurements made by instruments which employ a
47、stationary magnetic field. Its influence on measurements made by reluctance instruments employing an alternating magnetic field is much smaller (see 6.7). 4.9 Magnetic fields Strong magnetic fields, such as those produced by various types of electrical equipment, can seriously interfere with the ope
48、ration of instruments which employ a stationary magnetic field (see 6.7). 4.10 Foreign particles The probes of the instruments have to make physical contact with the test surface because these instrument are sensitive to foreign material that prevents intimate contact between the probe and the surfa
49、ce of the coating. The probe tip should be checked for cleanliness. 4.11 Magnetic properties of the coating Measurements are affected by variations in the magnetic properties of the coating. These properties depend on the conditions under which the deposit is made, the type and composition of the coating, and its stress conditions. Heat treatment at 400 C for 30 min will equalize the magnetic permeability of dull (sulphur-free or nearly sulphur-free) nickel coatings of the same composition. Bright nickel deposits may or may not hav
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