BS EN 15771-2010 Vitreous and porcelain enamels - Determination of surface scratch hardness according to the Mohs scale《搪瓷釉和搪瓷 按照莫氏硬度标测定表面划痕硬度》.pdf

1、BS EN 15771:2010ICS 25.220.50NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDVitreous andporcelain enamels Determinationof surface scratchhardness according tothe Mohs scaleThis British Standardwas published under theauthority of the StandardsPolicy and Strategy

2、Committee on 30 June2010 BSI 2010ISBN 978 0 580 61266 4Amendments/corrigenda issued since publicationDate CommentsBS EN 15771:2010National forewordThis British Standard is the UK implementation of EN 15771:2010.The UK participation in its preparation was entrusted to TechnicalCommittee STI/36, Vitre

3、ous enamel coatings.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot con

4、fer immunityfrom legal obligations.BS EN 15771:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15771 March 2010 ICS 25.220.50 English Version Vitreous and porcelain enamels - Determination of surface scratch hardness according to the Mohs scale maux vitrifis - Dtermination de la duret super

5、ficielle suivant lchelle de Mohs Emails und Emaillierungen - Bestimmung der Ritzhrte nach Mohs This European Standard was approved by CEN on 13 February 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th

6、e 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 Standard exists in three official versions (English, French, Germ

7、an). 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 standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus

8、, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMI

9、T EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management 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 15771:2010: EBS EN 15771:2010EN 15771:2010 (E) 2 Contents Page Fore

10、word 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Reference minerals 46 Test specimen 57 Procedure .58 Assessment of result 59 Test report 5BS EN 15771:2010EN 15771:2010 (E) 3 Foreword This document (EN 15771:2010) has been prepared by Technical Committee CEN/TC 262 “Me

11、tallic and other inorganic coatings”, the secretariat of which is held by BSI. 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 September 2010, and conflicting national standards shall be withdrawn

12、 at the latest by September 2010. 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. According to the CEN/CENELEC Internal Regulations, t

13、he 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nethe

14、rlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15771:2010EN 15771:2010 (E) 4 1 Scope This European Standard specifies a method of test for determining the scratch hardness of the surface of vitreous and porcelain enamels. 2 Nor

15、mative 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. EN 15206, Vitreous and porcelai

16、n enamels Production of specimens for testing enamel on sheet steel, sheet aluminium and cast iron 3 Terms and definitions For the purposes of this document, the following term and definition applies. 3.1 Mohs scale hardness scale of minerals, characterising the scratch resistance of various mineral

17、s through the ability of a harder mineral to scratch a softer mineral 4 Principle The scratch hardness on the Mohs scale, of vitreous and porcelain enamels is determined by drawing certain minerals of defined hardness, on the Mohs scale, by hand over their surface. 5 Reference minerals Reference min

18、erals and their Mohs scale hardness are listed in Table 1. Table 1 Reference minerals and their Mohs scale hardness Mineral Mohs scale hardnessTalc 1 Gypsum 2 Calcite 3 Fluorspar 4 Apatite 5 Felspar 6 Quartz 7 Topaz 8 Corundum 9 Diamond 10 BS EN 15771:2010EN 15771:2010 (E) 5 6 Test specimen The test

19、 specimen shall be prepared in accordance with EN 15206. 7 Procedure 7.1 Place the test specimen of the enamel that is under test on a firm support with the vitreous and porcelain enamel coating uppermost. 7.2 By hand, draw across the surface of the test specimen a sharp edge of the reference minera

20、l, starting with fluorspar, applying a uniform effort such that at the end of the test either the edge of the reference mineral or the surface of the test specimen is damaged. Scratch the surface of the test specimen two times with a sharp edge of the reference mineral. 7.3 Examine the test specimen

21、 visually for scratches. 7.4 If there are no scratches, repeat steps given in 7.1 to 7.3 with the reference mineral of the next highest Mohs scale hardness. 8 Assessment of result For each test specimen note the mineral of highest Mohs scale hardness that produces no scratches. In the case of a test

22、 specimen having variable scratch hardness, note the lowest Mohs scale hardness. 9 Test report The test report shall include the following: a) all information necessary for identification of the test specimen; b) reference to this European Standard (EN 15771); c) reference minerals used; d) results

23、of the test as specified in Clause 8, expressed as the Mohs scale hardness for each test specimen; e) any unusual features (anomalies) observed during the test; f) date of the test. BS EN15771:2010BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996

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