1、March 2014 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).ICS
2、87.040!%,g3“2096816www.din.deDDIN EN ISO 16474-2Paints and varnishes Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps (ISO 16474-2:2013);English version EN ISO 16474-2:2013,English translation of DIN EN ISO 16474-2:2014-03Beschichtungsstoffe Knstliches Bestrahlen oder Bewitter
3、n in Gerten Teil 2: Xenonbogenlampen (ISO 16474-2:2013);Englische Fassung EN ISO 16474-2:2013,Englische bersetzung von DIN EN ISO 16474-2:2014-03Peintures et vernis Mthodes dexposition des sources lumineuses de laboratoire Partie 2: Lampes arc au xnon (ISO 16474-2:2013);Version anglaise EN ISO 16474
4、-2:2013,Traduction anglaise de DIN EN ISO 16474-2:2014-03Together with DIN EN ISO16474-1:2014-03,supersedesDIN EN ISO 11341:2004-12www.beuth.deDocument comprises 23 pagesIn case of doubt, the German-language original shall be considered authoritative.02.14 DIN EN ISO 16474-2:2014-03 2 National forew
5、ord This document (EN ISO 16474-2:2013) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss B
6、eschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. DIN EN ISO 16474 consists of the following parts, under the general title Paints and varnishes Methods of e
7、xposure to laboratory light sources: Part 1: General guidance Part 2: Xenon-arc lamps Part 3: Fluorescent UV lamps The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 4618 DIN EN ISO 4618 ISO 4892-2 DIN EN ISO 4892-2 ISO 16474-1 DIN EN ISO
8、16474-1 Amendments This standard differs from DIN EN ISO 11341:2004-12 as follows: a) general guidance on artificial weathering has been transferred to DIN EN ISO 16474-1; b) specifications concerning xenon-arc lamps have been transferred to DIN EN ISO 16474-2. Previous editions DIN 53231: 1972-09,
9、1991-04 DIN EN ISO 11341: 1998-02, 2004-12 A comma is used as the decimal marker. DIN EN ISO 16474-2:2014-03 3 National Annex NA (informative) Bibliography DIN EN ISO 4618, Paints and varnishes Terms and definitions DIN EN ISO 4892-2, Plastics Methods of exposure to laboratory light sources Part 2:
10、Xenon-arc lamps DIN EN ISO 16474-1, Paints and varnishes Methods of exposure to laboratory light sources Part 1: General guidance DIN EN ISO 16474-2:2014-03 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16474-2 November 2013 ICS 87.040 Supersedes EN ISO
11、11341:2004English Version Paints and varnishes - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 16474-2:2013) Peintures et vernis - Mthodes dexposition des sources lumineuses de laboratoire - Partie 2: Lampes arc au xnon (ISO 16474-2:2013) Beschichtungsstoffe - Knstli
12、ches Bestrahlen oder Bewittern in Gerten - Teil 2: Xenonbogenlampen(ISO 16474-2:2013) This European Standard was approved by CEN on 26 October 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status o
13、f 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German
14、). 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,
15、Cyprus, 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 and United
16、 Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS
17、O 16474-2:2013 EContents PageForeword .3Introduction 41 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 65 Apparatus . 75.1 Laboratory light source . 75.2 Test chamber 85.3 Radiometer . 95.4 Black-standard/black-panel thermometer . 95.5 Wetting and humidity-control equipment
18、95.6 Specimen holders . 95.7 Apparatus to assess changes in properties . 106 Test specimens. 107 Exposure conditions 107.1 Radiation . 107.2 Temperature . 107.3 Relative humidity of chamber air 117.4 Spray cycle . 127.5 Cycles with dark periods . 127.6 Sets of exposure conditions 138 Procedure 138.1
19、 General 138.2 Mounting the test specimens . 138.3 Exposure 138.4 Duration of test 148.5 Measurement of radiant exposure 148.6 Determination of changes in properties after exposure 149 Test report 14Annex A (informative) Filtered xenon-arc radiation Spectral power distribution 15Annex B (normative)
20、Additional exposure cycles 17Bibliography .19DIN EN ISO 16474-2:2014-03 EN ISO 16474-2:2013 (E) 2 DIN EN ISO 16474-2:2014-03 EN ISO 16474-2:2013 (E) 3Foreword This document (EN ISO 16474-2:2013) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical
21、 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 2014, and conflicting national standards shall be withdraw
22、n at the latest by May 2014. 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 11341:2004. According to
23、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, Greece,
24、 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 16474-2:2013 has been approved by CEN as EN ISO 16474-2:2013 with
25、out any modification. IntroductionCoatings of paints, varnishes and similar materials (subsequently referred to simply as coatings) are exposed to laboratory light sources, in order to simulate in the laboratory the ageing processes which occur during natural weathering or during exposure tests unde
26、r glass cover.DIN EN ISO 16474-2:2014-03 EN ISO 16474-2:2013 (E) 4 1 ScopeThis part of ISO 16474 specifies methods for exposing specimens to xenon-arc light in the presence of moisture to reproduce the weathering effects that occur when materials are exposed in actual end-use environments to dayligh
27、t or to daylight filtered through window glass.The specimens are exposed to filtered xenon-arc light under controlled conditions (temperature, humidity and/or wetting). Various types of xenon-arc lamps and various filter combinations may be used to meet all the requirements for testing different mat
28、erials.Specimen preparation and evaluation of the results are covered in other International Standards for specific materials.General guidance is given in ISO 16474-1.NOTE Xenon-arc exposures for plastics are described in ISO 4892-2.2 Normative referencesThe following documents, in whole or in part,
29、 are 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 4618, Paints and varnishes Terms and definitionsI
30、SO 9370, Plastics Instrumental determination of radiant exposure in weathering tests General guidance and basic test methodISO 16474-1, Paints and varnishes Methods of exposure to laboratory light sources Part 1: General guidance3 Terms and definitionsFor the purposes of this document, the terms and
31、 definitions given in ISO 4618 and the following apply.3.1radiant exposureHamount of radiant energy to which a test panel has been exposedNote 1 to entry: Radiant exposure is given by the equation HEt=d .DIN EN ISO 16474-2:2014-03 EN ISO 16474-2:2013 (E) 5 whereH is the radiant exposure, in joules p
32、er square metre;E is the irradiance, in watts per square metre;t is the exposure time, in seconds.Note 2 to entry: If the irradiance E is constant throughout the whole exposure time, the radiant exposure H is given simply by the product of E and t.4 Principle4.1 A xenon arc, fitted with suitable fil
33、ters and properly maintained, is used to simulate the spectral power distribution of daylight in the ultraviolet (UV) and visible regions of the spectrum.4.2 Specimens are exposed to various levels of irradiance (radiant exposure), heat, relative humidity and water (see 4.4) under controlled environ
34、mental conditions.4.3 The exposure conditions may be varied by selection ofa) the light filter(s);b) the irradiance level;c) the temperature during light exposure;d) the relative humidity of the chamber air during light and dark exposures, when test conditions requiring control of humidity are used;
35、e) the type of wetting (see 4.4);f) the water temperature and wetting cycle;g) the timing of the light/dark cycle.4.4 Wetting is usually produced by spraying the test specimens with demineralized/deionized water, by immersion in water or by condensation of water vapour onto the surfaces of the speci
36、mens.4.5 The procedure shall include measurements of the irradiance and radiant exposure in the plane of the specimens.4.6 It is recommended that a similar material of known performance (a control) be exposed simultaneously with the test specimens to provide a standard for comparative purposes.4.7 I
37、ntercomparison of results obtained from specimens exposed in different equipments should not be made unless an appropriate statistical relationship has been established between the equipments for the particular material to be tested.DIN EN ISO 16474-2:2014-03 EN ISO 16474-2:2013 (E) 6 5 Apparatus5.1
38、 Laboratory light source5.1.1 GeneralThe light source shall comprise one or more quartz-jacketed xenon-arc lamps which emit radiation from below 270 nm in the ultraviolet through the visible spectrum and into the infrared. In order to simulate daylight, filters shall be used to remove short-waveleng
39、th UV radiation (method A, see Table 1). Filters to minimize irradiance at wavelengths shorter than 310 nm shall be used to simulate daylight through window glass (method B, see Table 2). In addition, filters to remove infrared radiation may be used to prevent unrealistic heating of the test specime
40、ns, which can cause thermal degradation not experienced during outdoor exposures.NOTE Solar spectral irradiance for a number of different atmospheric conditions is described in CIE No. 85. The benchmark daylight used in this part of ISO 16474 is that defined in CIE No. 85:1989, Table 4.5.1.2 Spectra
41、l irradiance of xenon-arc lamps with daylight filtersFilters are used to filter xenon-arc emissions in order to simulate daylight (CIE No. 85:1989, Table 42). The minimum and maximum levels of the relative spectral irradiance in the UV wavelength range are given in Table 1 (see also Annex A).Table 1
42、 Relative spectral irradiance of xenon-arc lamps with daylight filter a,b(method A)Spectral passband MinimumcCIE No. 85:1989, Table 4 d,eMaximumc( = wavelength in nm) % % % 290 0,15290 320 2,6 5,4 7,9320 360 28,2 38,2 39,8360 400 54,2 56,4 67,5aThis table gives the irradiance in the given passband,
43、expressed as a percentage of the total irradiance between 290 nm and 400 nm. To determine whether a specific filter or set of filters for a xenon-arc lamp meets the requirements of this table, the spectral irradiance has to be measured from 250 nm to 400 nm. Typically, this is done in 2 nm increment
44、s. The total irradiance in each wavelength passband is then summed and divided by the total irradiance from 290 nm to 400 nm.bThe minimum and maximum limits in this table are based on more than 100 spectral irradiance measurements with water- and air-cooled xenon-arc lamps with daylight filters from
45、 different production lots and of various ages, used in accordance with the recommendations of the manufacturer. As more spectral irradiance data become available, minor changes in the limits are possible. The minimum and maximum limits are at least three sigma from the mean for all the measurements
46、.cThe minimum and maximum columns will not necessarily sum to 100 % because they represent the minima and maxima for the measurement data used. For any individual spectral irradiance, the percentages calculated for the passbands in this table will sum to 100 %. For any individual xenon-arc lamp with
47、 daylight filters, the calculated percentage in each passband shall fall within the minimum and maximum limits given. Exposure results can be expected to differ if obtained using xenon-arc apparatus in which the spectral irradiances differ by as much as that allowed by the tolerances. Contact the manufacturer of the xenon-arc apparatus for specific spectral irradiance data for the xenon-arc lamp and filters used.dThe data from CIE Publication No. 85:1989, Table
