1、March 2016 English price group 8No 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 25.220.50!%N%Y“2430254www.din.deDIN
2、 EN ISO 28764Vitreous and porcelain enamels Production of specimens for testing enamels on sheet steel, sheet aluminium and cast iron (ISO 28764:2015);English version EN ISO 28764:2015,English translation of DIN EN ISO 28764:2016-03Emails und Emaillierungen Herstellung von Proben zur Prfung von Stah
3、lblech-Emails, Aluminium-Emails und Gusseisen-Emails (ISO 28764:2015);Englische Fassung EN ISO 28764:2015,Englische bersetzung von DIN EN ISO 28764:2016-03maux vitrifis Production dprouvettes pour lessai des maux sur la tle dacier, la tle daluminium et la fonte (ISO 28764:2015);Version anglaise EN I
4、SO 28764:2015,Traduction anglaise de DIN EN ISO 28764:2016-03SupersedesDIN EN ISO 28764:2011-06www.beuth.deDocument comprises 11 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.03.16 DIN EN ISO 28764:2016-03 2 A comma is used a
5、s the decimal marker. National foreword This document (EN ISO 28764:2015) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom). The r
6、esponsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-63 AA Prfung von Emails und Emaillierungen. The DIN Standards corresponding to the International Standards referred to in this document a
7、re as follows: DIN ISO 2746 ISO 13805 DIN EN ISO 2746 DIN EN ISO 13805 Amendments This standard differs from DIN EN ISO 28764:2011-06 as follows: a) a warning notice has been included; b) in 5.1.1, the tolerance on the side length of the specimen has been rendered more precise. Previous editions DIN
8、 51164: 1966-10 DIN ISO 2723: 1978-02, 1996-07 DIN ISO 2724: 1978-02 DIN 51172: 1986-10 DIN ISO 13804: 2000-12 DIN EN 15206: 2007-07 DIN EN ISO 28764: 2011-06 National Annex NA (informative) Bibliography DIN EN ISO 2746, Vitreous and porcelain enamels High voltage test DIN EN ISO 13805, Vitreous and
9、 porcelain enamels for aluminium Determination of the adhesion of enamels on aluminium under the action of electrolytic solution (spall test) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28764 November 2015 ICS 25.220.50 Supersedes EN ISO 28764:2011English Version Vitreous and porcelain
10、enamels - Production of specimens for testing enamels on sheet steel, sheet aluminium and cast iron (ISO 28764:2015) maux vitrifis - Production dprouvettes pour lessai des maux sur la tle dacier, la tle daluminium et la fonte (ISO 28764:2015) Emails und Emaillierungen - Herstellung von Proben zur Pr
11、fung von Stahlblech-Emails, Aluminium-Emails und Gusseisen-Emails (ISO 28764:2008) This European Standard was approved by CEN on 24 October 2015. 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
12、 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German).
13、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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyp
14、rus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kin
15、gdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28
16、764:2015 EEuropean foreword .31 Scope . 52 Normative references 53 Designation 54 Specimens from production articles 54.1 Requirements for the articles used . 54.2 Shape and dimensional requirements 64.3 Preparation 65 Specially produced specimens . 65.1 Shape, dimension and substrate requirements 6
17、5.1.1 General 65.1.2 Steel substrate 65.1.3 Cast iron substrate . 65.1.4 Aluminium substrate 75.1.5 Other substrates . 75.2 Enamelling of specimens 75.2.1 General 75.2.2 Steel enamelling . 75.2.3 Cast iron enamelling . 85.2.4 Aluminium enamelling . 85.2.5 Enamelling of other substrates . 85.3 Surfac
18、es of enamelled specimens . 8Bibliography 9Contents PageDIN EN ISO 28764:2016-03 EN ISO 28764:2015 (E)2Foreword 5European foreword This document (EN ISO 28764:2015) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“ in collaboration with Technical Committee C
19、EN/TC 262 “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 May 2016, and conflicting national standards shall be wit
20、hdrawn at the latest by May 2016. 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. This document supersedes EN ISO 28764:2011. Accordin
21、g to the CEN-CENELEC Internal Regulations, 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, Former Yugoslav Republic of Macedonia, France, Germany, Gr
22、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 28764:2015 has been approved by CEN as EN ISO 28764:2015 wit
23、hout any modification. DIN EN ISO 28764:2016-03 EN ISO 28764:2015 (E)3 ForewordISO (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 through ISO techni
24、cal 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 collaborates closely w
25、ith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed
26、 for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
27、hts. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in thi
28、s document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to
29、 Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 107, Metallic and other inorganic coatings.This second edition cancels and replaces the first edition (ISO 28764:2008), of which it constitutes a minor revision.DIN EN ISO 28
30、764:2016-03 EN ISO 28764:2015 (E)4 WARNING This International Standard calls for the use of substances and/or procedures that may be injurious to health if adequate safety measures are not taken. This International Standard does not address any health hazards, safety or environmental matters associa
31、ted with its use. It is the responsibility of the user of this International Standard to establish appropriate health, safety and environmentally acceptable practices and take suitable actions for any national and international regulations. Compliance with this International Standard does not of its
32、elf confer immunity from legal obligations.1 ScopeThis International Standard specifies a method for the production of specimens suitable for testing vitreous and porcelain enamel coatings.It specifies two different specimens: specimens taken from production articles; specially produced specimens.NO
33、TE Only the specially produced specimens can be used when the loss in mass per unit area of the enamel coating is to be determined quantitatively, as specimens cut from enamelled articles can reduce the accuracy of the test method.2 Normative referencesThe following documents, in whole or in part, a
34、re normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2746, Vitreous and porcelain enamels High voltage t
35、est3 DesignationSpecimens prepared in accordance with this International Standard shall have the following designation:Specimen: ISO 28764-(substrate)where a steel substrate is designated by A, a cast iron substrate by B and an aluminium substrate by C.EXAMPLE The designation of a specimen prepared
36、in accordance with this International Standard using a steel substrate is:Specimen ISO 28764-A4 Specimens from production articles4.1 Requirements for the articles usedThe specimens shall be taken from a production article that has been produced using the normal production parameters. Reworked artic
37、les shall not be used as a source of specimens.DIN EN ISO 28764:2016-03 EN ISO 28764:2015 (E)5 4.2 Shape and dimensional requirementsThe specimens shall be circular or square, with a diameter or side length of 105 mm 5 mm.The specimens shall normally be taken only from flat areas of the enamelled ar
38、ticles. For enamelled aluminium specimens, however, on which only the adherence is to be determined using the procedure given in ISO 138051, other shapes may be used.4.3 PreparationBefore cutting specimens off a production article, the enamel shall be removed by grinding along the cutting line on bo
39、th surfaces (i.e. front and back) of the production article down to the base metal. The width of the zone from which the enamel shall be removed shall be the width of the cutting tool plus 2 mm on each side.NOTE Grinding machines operating with corundum or diamond stones are suitable for removing th
40、e enamel.5 Specially produced specimens5.1 Shape, dimension and substrate requirements5.1.1 GeneralThe specimens shall be made from a substrate that can be enamelled and shall be flat, circular or square plates with a diameter or side length of 105 mm +105mm.If a specimen is intended to hang during
41、weighing and/or enamelling, the specimen shall be provided with a hole to enable it to be hung. The hole shall be approximately 2,5 mm in diameter with its centre either 3 mm from the edge of a circular test plate or 3 mm from the corner of a square test plate.5.1.2 Steel substrateThe sheet steel to
42、 which the enamel is applied shall be of an appropriate enamelling quality for the enamelling process used and its thickness shall normally be between 0,3 mm and 3,0 mm.Other thicknesses may be used if agreed between the interested parties; if other thicknesses are used (i.e. thicknesses not within
43、the range 0,3 mm to 3 mm) the thickness shall be clearly reported with every test result obtained.Condition the metal for enamelling using any recognized method, but use the same method, substrate quality and substrate thickness if the specimens are provided for comparison purposes.In the case of fi
44、sh-scale testing, take steel strips a minimum of 100 mm wide from across the whole width of the steel coil.NOTE 1 EN 102092describes the steel quality required when enamelling cold-rolled steel using different processes.NOTE 2 Clause B.2 of EN 10209:20132describes the fish-scale test.5.1.3 Cast iron
45、 substrateThe cast iron to which the enamel is applied shall be of enamelling quality.The specimens may be specially cast plates or plates cut from a cast iron bar with a minimum thickness of 2,5 mm. If the mass of cut specimens is to be determined in order to determine the loss in mass of the ename
46、l coating, and the mass exceeds the carrying capacity of the analytical balance, the thickness may be reduced by machining.DIN EN ISO 28764:2016-03 EN ISO 28764:2015 (E)6 Condition the metal for enamelling using any recognized method, but use the same method, substrate quality and substrate thicknes
47、s if the specimens are provided for comparison purposes.Completely ferritized grey cast iron is suitable. Pre-annealing between 700 C and 850 C for 10 min to 15 min may be used in order to achieve the ferritization.5.1.4 Aluminium substrateThe aluminium to which the enamel is applied shall be of ena
48、melling quality. Aluminium sheet specimens shall have a thickness between 2 mm and 3 mm.Condition the metal for enamelling using any recognized method, but use the same method, substrate quality and substrate thickness if the specimens are provided for comparison purposes.NOTE The following aluminium alloys are suitable for sheet substrates if their Mg content is below a mass fraction of 0,01 %: alloys EN AW-1050A, EN AW-3003 and EN AW-4
