1、July 2010 Translation by DIN-Sprachendienst.English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25
2、.220.50!$iJ“1703927www.din.deDDIN EN 15771Vitreous and porcelain enamels Determination of surface scratch hardness according to the Mohs scaleEnglish translation of DIN EN 15771:2010-07Emails und Emaillierungen Bestimmung der Ritzhrte nach MohsEnglische bersetzung von DIN EN 15771:2010-07Dterminatio
3、n de la duret superficielle suivant lchelle de MohsTraduction anglaise de DIN EN 15771:2010-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 7 pagesvitrifis maux 07.10 DIN EN 15771:2010-07 2 A comma is used as the decimal marker. Natio
4、nal foreword This standard has been prepared by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical
5、 Committee NA 062-01-63 AA Prfung von Emails und Emaillierungen. EUROPEAN 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
6、la duret superficielle 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 Europe
7、an 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 Standard exists in three official versions (English
8、, 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 standards bodies of Austria, Belgium, Bulgaria, C
9、roatia, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDA
10、RDIZATION COMIT 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: EEN 15771:2010 (E) 2 Contents Page Forewo
11、rd 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 5DIN EN 15771:2010-07 EN 15771:2010 (E) 3 Foreword This document (EN 15771:2010) has been prepared by Technical Committee CEN/TC 262
12、“Metallic 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 withdr
13、awn 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
14、, the 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, Ne
15、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15771:2010-07 EN 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 enamel
16、s. 2 Normative 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
17、porcelain 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
18、 minerals 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 Refer
19、ence minerals 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 DIN EN 15771:2010-07 EN 15771:2010 (E) 5 6 Test spec
20、imen The test 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 ref
21、erence mineral, 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
22、test specimen 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 c
23、ase of a test 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 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. DIN EN 15771:2010-07
