DIN EN ISO 13807-2009 Vitreous and porcelain enamels - Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industry (ISO 13807 199.pdf

《DIN EN ISO 13807-2009 Vitreous and porcelain enamels - Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industry (ISO 13807 199.pdf》由会员分享，可在线阅读，更多相关《DIN EN ISO 13807-2009 Vitreous and porcelain enamels - Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industry (ISO 13807 199.pdf（11页珍藏版）》请在麦多课文档分享上搜索。

1、April 2009DEUTSCHE NORM English price group 7No part of this standard 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!$W,“1520992www.

2、din.deDDIN EN ISO 13807Vitreous and porcelain enamels Determination of crack formation temperature in the thermal shocktesting of enamels for the chemical industry (ISO 13807:1999, includingCor 1:2000)English version of DIN EN ISO 13807:2009-04Emails und Emaillierungen Bestimmung der Rissbildungstem

3、peratur von Chemie-Emails beim Abschreckversuch(ISO 13807:1999, einschlielich Cor 1:2000)Englische Fassung DIN EN ISO 13807:2009-04SupersedesDIN ISO 13807:2001-09www.beuth.deDocument comprises 11 pagesDIN EN ISO 13807:2009-04 2 National foreword This standard has been prepared by Technical Committee

4、 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 responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Stand

5、ards Committee), Technical Committee NA 062-01-63 AA Prfung von Emails und Emaillierungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2746 DIN EN 14430 ISO 2808 DIN EN ISO 2808 ISO 3819 DIN 12331 Clauses 2 and 3 of ISO 13807:1999,

6、and thus of EN ISO 13807:2009, contain an incorrect normative reference to ISO 10141. This document has never been published as a standard. Since the only reference to The Corrigendum to ISO 13807 (ISO 13807:1999/Cor 1:2000) has been incorporated in the text of this document (see subclause 7.1, para

7、graph below Figure 1: Heating of the specimens up to 600 C instead of 800 C). Amendments This standard differs from DIN ISO 13807:2001-09 as follows: a) The standard has been editorially revised. Previous editions DIN 51167: 1985-08, 1994-12 DIN ISO 13807: 2001-09 National Annex NA (informative) Bib

8、liography DIN 12331, Laboratory glassware Beakers DIN EN 14430, Vitreous and porcelain enamels High voltage test DIN EN ISO 2808, Paints and varnishes Determination of film thickness ISO 10141 is in Clause 3 regarding terms and definitions, this error has no impact on the use of this standard. EUROP

9、EAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 13807January 2009ICS 25.220.50English VersionVitreous and porcelain enamels - Determination of crackformation temperature in the thermal shock testing of enamels1:2000)maux vitrifis - Dtermination de la temprature defissuration par choc thermique dmau

10、x pour lindustriechimique (ISO 13807:1999, Cor 1:2000 inclus)Rissbildungstemperatur von Chemie-Emails beim1:2000)This European Standard was approved by CEN on 13 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur

11、opeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English

12、, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cypr

13、us, 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 STANDARDIZATIONCOMIT

14、EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 13807:2009: EEmails und Emaillierungen - Bestimmung derAbschreckversu

15、ch (ISO 13807:1999, einschlielich Corfor the chemical industry (ISO 13807:1999, including CorContents Page 1 2 3 4 5 Scope4 Normative references4 6 7 8 9 EN ISO 13807:2009 (E) 2Terms and definitions .4 Foreword .3 10 Designation 5 Principle .5 Apparatus 5 Specimens .5 Procedure 6 Expression of resul

16、ts 7 Test Report .7 Annex (informative) Explanatory notes .8 Bibliography 9 DIN EN ISO 13807:2009-04 Foreword The text of ISO 13807:1999, including Cor 1:2000 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” of the International Organization for Standardiza

17、tion (ISO) and has been taken over as EN ISO 13807:2009 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 endorse

18、ment, at the latest by July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. 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 a

19、ny or all such patent rights. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hung

20、ary, 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 13807:1999, including Cor 1:2000 has been approved by CEN as a EN ISO 13807:20

21、09 without any modification. EN ISO 13807:2009 (E) 3DIN EN ISO 13807:2009-04 1 ScopeThis International Standard specifies a test method for the determination of the crack formation temperature ofenamels for the chemical industry by subjecting enamelled steel specimens to thermal shock using cold wat

22、er.The value of the crack formation temperature measured according to this test method is not valid for the finishedcomponent (see annex A). It is a parameter of vitreous and porcelain enamels for comparing the relative quality ofdifferent enamel formulations.2 Normative referencesThe following norm

23、ative documents contain provisions which, through reference in this text, constitute provisions ofthis International Standard. For dated references, subsequent amendments to, or revisions of, any of thesepublications do not apply. However, parties to agreements based on this International Standard a

24、re encouraged toinvestigate the possibility of applying the most recent editions of the normative documents indicated below. Forundated references, the latest edition of the normative document referred to applies. Members of ISO and IECmaintain registers of currently valid International Standards.IS

25、O 2746, Vitreous and porcelain enamels Enamelled articles for service under highly corrosive conditions High voltage test.ISO 2808, Paints and varnishes Determination of film thickness.IS0 3819, Laboratory glassware Beakers.3 Terms and definitionsFor purposes of this International Standard, the term

26、s and definitions given in as well as thefollowing apply.3.1crack formation temperaturethermal shock temperature at which the first damage to the enamel occurs in the form of cracks and/or chipping3.2thermal shock temperaturetemperature of the specimen immediately before quenching with cold waterISO

27、 10141, Vitreous and porcelain enamels Vocabulary .the ISO 10141N1)N1)National footnote: See National foreword. EN ISO 13807:2009 (E) 4DIN EN ISO 13807:2009-04 N1)4 DesignationThe test method for the determination of the crack formation temperature of enamels for the chemical industry bythe thermal

28、shock test described in this Intemational Standard is designated as follows:Test ISO 138075PrincipleThe specimen is heated to the thermal shock temperature in a drying oven. After reaching the thermal shocktemperature, the enamelled surface is covered by water at a temperature between 10 C and 30 C.

29、 Then thespecimen is dried and visually examined for damage. To make cracks visible, the entire enamel surface is sprayedwith electrostatically charged talcum powder. If no damage to the enamel is found after the first thermal shock test,the test shall be repeated at a thermal shock temperature 10 C

30、 higher than in the previous test.6 Apparatus6.1 Drying oven, capable of maintaining temperatures of at least 300 C.6.2 Low-form beaker, having a capacity of 2 000 ml meeting the requirements of ISO 3819.6.3 Spray gun, equipped with a hard-rubber nozzle for electrostatically charging the talcum powd

31、er.7 Specimens7.1 Shape and preparation of specimensSpecimens shall be square sheet metal plates with a thickness of at least 10 mm and an edge length of 150 mmthat have been enamelled on one side.Alternatively, specimens as shown in Figure 1 made of 10MnTi3 low-alloyed enamelling structural steel m

32、ay beused. The steel shall have the following nominal composition (% mass fraction):Gbe carbon, u 0,12 %;Gbe manganese, 0,40 % to 1,00 %;Gbe titanium 0,10 % to 0,16 %;Gbe phosphorus u 0,035 %;Gbe sulphur, u 0,030 %.During the enamelling process, these specimens shall be held in the horizontal positi

33、on by means of a rod insertedin the 5 mm hole. The ground coat shall cover the entire surface. The cover coat may be applied only to the top andconvex surface (radius 8 mm).NOTE Besides the determination of crack formation temperature, enamelled specimens shown in Figure 1 may also beused for corros

34、ion tests in closed systems according to ISO 13806.EN ISO 13807:2009 (E) 5DIN EN ISO 13807:2009-04 Dimensions in millimetresRoughness values in micrometresFigure 1 Steel specimen for determination of the crack formation temperature of enamelsby thermal shockPrepare the specimens by the same enamelli

35、ng process used for the enamelled product, including thepretreatment, type of ground and cover coat, application technique, firing temperature and thickness of the groundcoat. After each firing step, the specimens are removed from the oven and may be cooled in air. However, thespecimens shall be sub

36、mitted to controlled cooling after the last coating or directly after the last firing. Heat the250 C at acoolingrateofu1C/min(seeannexA).The overall thickness of the enamel measured by the method given in ISO 2808 shall be between 0,8 mm and1,4 mm.The finished enamel coating shall be free from defec

37、ts. This shall be checked visually, as well as with the highvoltage test at 12 kV described in ISO 2746.Specimens of other shapes or manufacture may be used, when specified by the purchaser. The use of specimenshaving different shapes or manufacture shall be noted in the test report.7.2 Number of sp

38、ecimensTwo specimens of the same type shall be used for each determination.8 Procedure8.1 Place the two enamelled specimens with the enamelled surface upwards in the drying oven (6.1) heated tothe thermal shock temperature. The thermal shock temperature shall be about 20 C below the expected crackfo

39、rmation temperature. If necessary, determine the crack formation temperature by a preliminary test.8.2 Determine by a preliminary test, the time span necessary for heating the specimens to the thermal shocktemperature. After the specimens have reached the thermal shock temperature, open the drying o

40、ven (6.1) andremove one specimen by means of a fork or other tool, without touching the enamel surface. Hold the specimenhorizontally and cover the centre of it by pouring 2 I of water at a temperature between 10 C and 30 C, pouringthe water at a rate of approximately 100 ml/s. From the moment the d

41、rying oven (6.1) is opened until the cold wateris poured on to the specimen, no more than 3 s shall elapse.uspecimens up to 600 C in an oven, maintain this temperature for at least 20 min, then cool toEN ISO 13807:2009 (E) 6DIN EN ISO 13807:2009-04 8.3 After the first specimen has been removed from

42、the drying oven (6.1), leave the second specimen in theoven until it has again reached the thermal shock temperature, plus an additional 5 min. Then repeat the thermalshock step with the second specimen, by the procedure described in 8.2.8.4 Check the dried specimens visually for damage to the ename

43、l. To make cracks easier to detect, spray theenamel with electrostatically charged talcum powder using the spray gun (6.3). This technique will make even finecracks easy to detect.8.5 If no damage to the enamel is detected on one or both specimens after the thermal shock test, repeat thetest on the

44、same specimens at a thermal shock temperature that is 10 C higher than in the first test.8.6 If the difference in the crack formation temperature as determined by the above procedure is greater than10 C, the test shall be repeated with two new specimens.9 Expression of resultsAverage the crack forma

45、tion temperatures that do not differ by more than 10 C.10 Test reportThe test report shall include the following information:a) the type of enamel tested;b) the designation (see clause 4) of this test method, i.e. Test ISO 13807;c) the thickness of the enamel coating;d) the material code or designat

46、ion of the basis metal;e) if applicable, the shape of the specimen, if specified by the purchaser (see clause 7);f) the description of the damage to the enamel coating;g) the individual values of the crack formation temperatures, in C;h) the arithmetic mean of the crack formation temperature, in C.E

47、N ISO 13807:2009 (E) 7DIN EN ISO 13807:2009-04 Annex A(informative)Explanatory notesIn the case of vitreous enamelling, the two components, enamel and metal, are firmly fused together by means of amechanical and chemical bond. As a result of the different thermal expansion and softening characterist

48、ics ofenamel and metal, temperature-dependent stresses develop in the composite. The components of the compositeare generally designed such that compressive stresses are present in the melted-on enamel coating.In the case of vitreous enamelling, four different types of thermal shock are known:a) col

49、d-shock on the enamel side;b) heat shock on the metal side;c) heat shock on the enamel side;d) cold shock on the metal side.Since cold shock on the enamel side with cold water is the most critical type, this test is specified in thisInternational Standard.The crack formation temperature of enamel as determined by thermal shock testing is a characteristic of thecomposite material. No conclusions should be drawn from the results of this thermal shock test about theresistance to cold of an enamelled product. In practice, the crack for