1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 28764:2011Vitreous and porcelain enamels Production of specimens fortesting enamels on sheet steel,sheet aluminium and cast iron(ISO 28764:2008)Copyright European Commi
2、ttee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 28764:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 28764:2011. It is identical to ISO 28764:20
3、08. It supersedes BS 1344-12:1996, BS 1344-13:1975, BS EN 15206:2007, and BS ISO 13804:1999, which are withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e S T I / 3 6 , V i t r e o u s e n a m e l c o a t i n g s .A list of organizations represented
4、 on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 72287 5 ICS 25.220.50 Compliance with a British Standard cannot confer im
5、munity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CEN
6、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28764 March 2011 ICS 25.220.50 Supersedes EN 15206:2007English Version Vitreous and porcelain enamels - Production of specimens for testing enamels on sheet ste
7、el, sheet aluminium and cast iron (ISO 28764:2008) maux vitrifis - Production dprouvettes pour lessai des maux sur la tle dacier, la tle daluminium et la fonte (ISO 28764:2008) Emails und Emaillierungen - Herstellung von Proben zur Prfung von Stahlblech-Emails, Aluminium-Emails und Gusseisen-Emails
8、(ISO 28764:2008) This European Standard was approved by CEN on 3 March 2011. 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 alteration. Up-to-date lists and bibli
9、ographical 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). A version in any other language made by translation under the respons
10、ibility 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gree
11、ce, 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manageme
12、nt Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28764:2011: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction
13、 or networking permitted without license from IHS-,-,-BS EN ISO 28764:2011 EN ISO 28764:2011 (E) 3 Foreword The text of ISO 28764:2008 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” of the International Organization for Standardization (ISO) and has been
14、taken over as EN ISO 28764:2011 by Technical Committee CEN/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 S
15、eptember 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. 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
16、 patent rights. This document supersedes EN 15206:2007. According 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, Fin
17、land, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 28764:2008 has been approved by CEN as a EN
18、 ISO 28764:2011 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 28764:2011ISO 28764:2008(E) ISO 2008 All rights reserved iiiContents Page Fore
19、word iv 1 Scope 1 2 Normative references1 3 Designation 1 4 Specimens from production articles .1 4.1 Requirements for the used articles .1 4.2 Shape and dimension requirements2 4.3 Preparation.2 5 Specially produced specimens2 5.1 Shape, dimension and substrate requirements .2 5.2 Enamelling of spe
20、cimens .3 5.3 Surface of enamelled specimens.4 Bibliography5 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 28764:2011ISO 28764:2008(E) iv ISO 2008 All rights reserved
21、Foreword ISO (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 technical committees. Each member body interested in a subject for which a t
22、echnical 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 with the International Electrotechnical Commission (IEC) on all matters
23、 of electrotechnical standardization. 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 circulate
24、d to the member bodies for voting. Publication 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
25、for identifying any or all such patent rights. ISO 28764 was prepared by the European Committee for Standardization (CEN) (as EN 15206) and was adopted, under a special “fast-track procedure”, by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, in parallel with its approval by
26、the ISO member bodies. It cancels and replaces ISO 2723:1995, ISO 2724:1973 and ISO 13804:1999, which have been technically revised. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,
27、-,-BS EN ISO 28764:2011INTERNATIONAL STANDARD ISO 28764:2008(E) ISO 2008 All rights reserved 1Vitreous and porcelain enamels Production of specimens for testing enamels on sheet steel, sheet aluminium and cast iron 1 Scope This International Standard specifies a method for the production of specimen
28、s suitable for testing vitreous and porcelain enamel coatings. It specifies two different specimens: specimens taken from production articles; specially produced specimens. NOTE Only the specially produced specimens can be used when the loss in mass per unit area of the enamel coating is to be deter
29、mined quantitatively, as specimens cut from enamelled articles can reduce the accuracy of the test method. 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, t
30、he latest edition of the referenced document (including any amendments) applies. EN 14430, Vitreous and porcelain enamels High voltage test 3 Designation Specimens prepared in accordance with this International Standard shall have the following designation: Specimen: ISO 28764-(substrate) where a st
31、eel substrate is designated by A, a cast iron substrate by B and an aluminium substrate by C. EXAMPLE The designation of a specimen prepared in accordance with this International Standard using a steel substrate is: Specimen: ISO 28764-A 4 Specimens from production articles 4.1 Requirements for the
32、articles used The specimens shall be taken from a production article that has been produced using the normal production parameters. Reworked articles shall not be used as a source of specimens. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo re
33、production or networking permitted without license from IHS-,-,-BS EN ISO 28764:2011ISO 28764:2008(E) 2 ISO 2008 All rights reserved4.2 Shape and dimensional requirements The specimens shall be circular or square, with a diameter or side length of 105 mm 5 mm. The specimens shall normally be taken o
34、nly from flat areas of the enamelled articles. 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 Preparation Before cutting specimens off a production article, the enamel shall be removed
35、 by grinding along the cutting line on both 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 d
36、iamond stones are suitable for removing the enamel. 5 Specially produced specimens 5.1 Shape, dimension and substrate requirements 5.1.1 General The 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 5
37、mm. If a specimen is intended to hang during 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
38、plate. 5.1.2 Steel substrate The sheet steel to 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 th
39、icknesses are used (i.e. thicknesses not within 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 p
40、rovided for comparison purposes. In the case of fish-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 1020
41、9:19962describes the fish-scale test. 5.1.3 Cast iron substrate The 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 determi
42、ned in order to determine the loss in mass of the enamel coating, and the mass exceeds the carrying capacity of the analytical balance, the thickness may be reduced by machining. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or n
43、etworking permitted without license from IHS-,-,-BS EN ISO 28764:2011ISO 28764:2008(E) ISO 2008 All rights reserved 3Condition 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 purpose
44、s. 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 substrate The aluminium to which the enamel is applied shall be of enamelling quality. Aluminium sheet specimens shall ha
45、ve 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 the
46、ir Mg content is below a mass fraction of 0,01 %: alloys EN AW-1050A, EN AW-3003 and EN AW-4006 as described in EN 573-33. 5.1.5 Other substrates For vitreous and porcelain enamels used on other substrates, the substrate used and the conditioning parameters shall be agreed between the interested par
47、ties. 5.2 Enamelling of specimens 5.2.1 General The normal processing steps of the enamelling process, i.e. those used in that particular process, shall be followed and no extra steps (such as repair enamelling or extra firing) shall be used for the production of the specimen. Care shall be taken to
48、 ensure that there is a minimum of build-up of enamel around the edges of the specimen. The enamel applied can, therefore, be wiped, using a suitable method, from the edges to a width of 2 mm or 3 mm after drying and before fusing the specimen. Comparative specimens shall be of the same nominal thickness. The maximum difference in thickness between all comparative specimens shall be less than 15 %. In all cases, the thickness of the enamel coating applied to the test specimen shall be that normally used in the enamelling of the production article. 5.2.2 Steel enamelling 5.2.2.1 Applica
