1、February 2012 Translation by DIN-Sprachendienst.English price group 12No 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).I
2、CS 87.040!$ya%“1866202www.din.deDDIN EN ISO 7783Paints and varnishes Determination of water-vapour transmission properties Cup method (ISO 7783:2011)English translation of DIN EN ISO 7783:2012-02Beschichtungsstoffe Bestimmung der Wasserdampfdurchlssigkeit Schalenverfahren (ISO 7783:2011)Englische be
3、rsetzung von DIN EN ISO 7783:2012-02Peintures et vernis Dtermination des proprits de transmission de la vapeur deau Mthode de la coupelle (ISO 7783:2011)Traduction anglaise de DIN EN ISO 7783:2012-02SupersedesDIN EN ISO 7783-1:1999-06 andDIN EN ISO 7783-2:1999-04www.beuth.deDocument comprises pagesI
4、n case of doubt, the German-language original shall be considered authoritative.2402.12 DIN EN ISO 7783:2012-02 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee
5、 CEN/TC 139 Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-15 AA Bautenbeschichtungen. The DIN
6、Standards corresponding to the International Standards referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 2808 DIN EN ISO 2808 ISO 3696 DIN ISO 3696 ISO 12572 DIN EN ISO 12572 ISO 15528 DIN EN ISO 15528 Amendments This standard differs from DIN EN ISO 7783-1:1999-06 and DIN EN
7、 ISO 7783-2:1999-04 as follows: a) both standards have been combined; b) the standard has been editorially revised. Previous editions DIN EN ISO 7783-1: 1999-06 DIN EN ISO 7783-2: 1999-04 National Annex NA (informative) Bibliography DIN EN ISO 1513, Paints and varnishes Examination and preparation o
8、f test samples DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 12572, Hygrothermal performance of building materials and products Determination of water vapour transmission properties DIN EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Samp
9、ling DIN ISO 3696, Water for analytical laboratory use Specification and test methods EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7783 November 2011 ICS 87.040 Supersedes EN ISO 7783-1:1999, EN ISO 7783-2:1999English Version Paints and varnishes - Determination of water-vapour transmiss
10、ion properties - Cup method (ISO 7783:2011) Peintures et vernis - Dtermination des proprits de transmission de la vapeur deau - Mthode de la coupelle (ISO 7783:2011) Beschichtungsstoffe - Bestimmung der Wasserdampfdurchlssigkeit - Schalenverfahren (ISO 7783:2011) This European Standard was approved
11、by CEN on 21 November 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 bibliographical references concerning such national st
12、andards 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 responsibility of a CEN member into its own language and
13、 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit
14、huania, 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 Management Centre: Avenue Marnix 17, B-1000 Brussels 2011
15、 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7783:2011: EContents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle 7 5 Apparatus and materials .7 5.1 Substrate for no
16、n-self-supporting coatings .7 5.2 Test cup 7 5.3 Ammonium dihydrogen phosphate (NH4H2PO4) solution for wet-cup method .7 5.4 Desiccant for dry-cup method 7 5.5 Sealing material .8 5.6 Test enclosure 8 5.7 Balance .8 6 Preparation for the test .8 6.1 Sampling of coating material 8 6.2 Preparation of
17、test pieces .8 6.3 Determination of the thickness of the coating .9 6.4 Preparation of the test assemblies . 10 7 Procedure 10 8 Expression of results . 11 8.1 Water-vapour transmission rate, V, of self-supporting coatings . 11 8.2 Water-vapour transmission rate, V, of non-self-supporting coatings .
18、 11 8.3 Water-vapour diffusion-equivalent air layer thickness, sd13 8.4 Water-vapour resistance factor, . 13 9 Precision 14 9.1 Repeatability, (r) 14 9.2 Reproducibility, (R) . 14 10 Test report . 14 Annex A (informative) Derivation of Equation (8) in Subclause 8.3 for the calculation of the water-v
19、apour diffusion-equivalent air layer thickness, sd. 16 Annex B (normative) Use of molten wax for sealing the test assembly . 18 Bibliography . 22 DIN EN ISO 7783:2012-02 EN ISO 7783:2011 (E) 2 Foreword This document (EN ISO 7783:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and va
20、rnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. 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 2012, and conflict
21、ing national standards shall be withdrawn at the latest by May 2012. 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 sup
22、ersedes EN ISO 7783-1:1999, EN ISO 7783-2:1999. 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, Finland, Fr
23、ance, 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 7783:2011 has been approved by CEN as a EN ISO 7783
24、:2011 without any modification. DIN EN ISO 7783:2012-02 EN ISO 7783:2011 (E) 3 IntroductionISO 7783 is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products. It describes a method for determining the water-vapour transmission rate of self-suppor
25、ting and non-self-supporting coatings.The water-vapour transmission rate is not necessarily a linear function of film thickness, temperature or relative-humidity difference. A determination carried out under one set of conditions will not necessarily be comparable with one carried out under other co
26、nditions. Therefore, it is essential that the conditions of test are chosen to be as close as possible to the conditions of use.Water-vapour transmission is of greatest interest under conditions of high humidity. For this reason, the wet-cup method has been adopted as the reference method. By agreem
27、ent, other procedures and conditions, like the dry-cup method, may be used.DIN EN ISO 7783:2012-02 EN ISO 7783:2011 (E) 4 1 ScopeThis International Standard specifies a method for determining the water-vapour transmission properties of coatings of paints, varnishes and related products.It supplement
28、s ISO 12572. As far as possible, the procedure, the definitions and the calculations have been taken over from ISO 12572. It is recommended that ISO 12572 be consulted, if necessary, to obtain a better understanding of the procedure specified in this International Standard.Water-vapour transmission
29、rates of more than 680 g/(m2nulld) (i.e. water-vapour diffusion-equivalent air layer thicknesses, nulld, of less than 0,03 m) will not be accurately quantified by the test method described in this International Standard.2 Normative referencesThe following referenced documents are indispensable for t
30、he 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.ISO 1513, Paints and varnishes Examination and preparation of test samples ISO 2808, Paints and varnishes De
31、termination of film thicknessISO 3233, Paints and varnishes Determination of percentage volume of non-volatile matter by measuring the density of a dried coatingISO 3696, Water for analytical laboratory use Specification and test methodsISO 15528, Paints, varnishes and raw materials for paints and v
32、arnishes Sampling3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1water-vapour transmission ratenullmass of water vapour that is transmitted over a given period through a given surface area of a test piece under specified constant conditions of r
33、elative humidity at each face of the test pieceNOTE 1 It is measured in grams per square metre per day g/(m2nulld).NOTE 2 A water-vapour transmission rate measured at atmospheric pressure, null, can be converted to the equivalent value at standard atmospheric pressure, null0, by multiplying by null/
34、null0. This allows a linear correlation with the water-vapour diffusion-equivalent air layer thickness (nulld) value (see 3.3) by the factor 20,4.NOTE 3 The term “water-vapour transmission” is often incorrectly used for water-vapour transmission rate.DIN EN ISO 7783:2012-02 EN ISO 7783:2011 (E) 5 3.
35、2rate of flow of water vapour through the test piecenullmass of water vapour that is transmitted over a given period through a test piece under specified constant conditions of relative humidity at each face of the test pieceNOTE It is measured in grams per hour.3.3water-vapour diffusion-equivalent
36、air layer thicknessnulldthickness of a static air layer that has, under the same conditions of measurement, the same water-vapour transmission rate as the coating testedNOTE It is measured in metres.3.4water-vapour resistance factornullfactor that indicates how many times greater the water-vapour re
37、sistance of a material is compared with a layer of static air of the same thickness at the same temperature and pressureNOTE 1 It is dimensionless.NOTE 2 The calculation and use of a water-vapour resistance factor is meaningful only if the water-vapour transmission rate of a particular material is a
38、 constant, i.e. independent of the thickness, which, however, is normally not the case for coatings.3.5test piecenullnon-self-supporting coatingsnull supporting substrate with the coating applied to it or nullself-supporting coatingsnull the coating alone3.6wet-cup methodmethod of measuring water-va
39、pour permeability in which the test piece is sealed to the rim of a cup containing a saturated aqueous solution of ammonium dihydrogen phosphateNOTE This is the most convenient manner of carrying out determinations of water-vapour permeability under conditions of high relative humidity (between 93 %
40、 and 50 %).3.7dry-cup methodmethod of measuring water-vapour permeability in which the test piece is sealed to the rim of a cup containing a desiccantNOTE This is the most convenient manner of carrying out determinations of water-vapour permeability under conditions of low relative humidity (between
41、 50 % and 3 %).3.8test assemblyassembly consisting of a test piece sealed to the rim of a test cup containing saturated ammonium dihydrogen phosphate solution in contact with undissolved ammonium dihydrogen phosphate crystals (wet-cup method) or containing desiccant (dry-cup method)3.9test areaarea
42、of the face of the test piece through which the water vapour flows during the testNOTE It is measured in square metres.DIN EN ISO 7783:2012-02 EN ISO 7783:2011 (E) 6 4 PrincipleA test assembly consisting of a self-supporting coating, or a non-self-supporting coating on porous substrate, sealed to th
43、e rim of a cup is placed in a test enclosure kept at a specified temperature (e.g. 23 C) and relative humidity (e.g. 50 %). The relative humidity in the cup is maintained at a constant level either at 93 % by means of a saturated salt solution (wet-cup method) or at 3 % by means of a desiccant (dry-
44、cup method). Because of the difference between the partial pressure of the water vapour inside the test cup and the partial pressure of the water vapour in the test enclosure, water vapour diffuses through the coating under test. By weighing the test assembly at suitable time intervals, the change i
45、n mass of the test assembly is followed. From the change in mass and the test area, the water-vapour transmission rate and the water-vapour diffusion-equivalent air layer thickness are calculated.5 Apparatus and materials5.1 Substrate for non-self-supporting coatingsAny homogenous, porous material w
46、hich has a water-vapour transmission rate above 240 g/(m2nulld) is suitable for use as the substrate for non-self-supporting coatings, for instance polyethylene frits, cellular-concrete discs, glass frits, unglazed ceramic tiles.When using cellular-concrete substrates, the coating shall be applied o
47、n the smooth side.If the coating system under test does not include a primer and it is necessary to use one before applying the coating system under test, do so, but the transmission rate of the primed substrate will have to be determined separately.5.2 Test cupTest cups are made of glass, plastic o
48、r metal. The test cup used shall be resistant to corrosion under the conditions of the test.NOTE For aluminium test cups, a wall thickness of 1 mm has been found to be satisfactory.The exact surface area of the test piece exposed is defined by the design of the cup. The area of the exposed surface shall be at least 50 cm2for non-self-supporting coatings and at least 10 cm2for self-supporting coatings.The cup shall be so designed that an efficient seal is made between it and the test piece, using sealing material (se
