1、BSI Standards PublicationBS EN ISO 16474-3:2013Paints and varnishes Methods of exposure tolaboratory light sourcesPart 3: Fluorescent UV lamps (ISO16474-3:2013)Incorporating corrigendum October 2015BS EN ISO 16474-3:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation
2、 of EN ISO 16474-3:2013. Together with BS EN ISO 16474-1:2013 it supersedes BS EN ISO 11507:2007, which is withdrawn.This publication incorporates CEN correction notice 18 December 2013, which corrects the supersession information.The UK participation in its preparation was entrusted to Technical Co
3、mmittee STI/10, Test methods for paints.A list of organizations represented 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. The British Standards
4、Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 91713 4 ICS 87.040 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2014.Amendm
5、ents/corrigenda issued since publicationDate Text affected31 October 2015 Implementation of ISO corrected text 1 November2014: Subclauses 7.4 and 7.6 updatedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16474-3 November 2013 ICS 87.040 English Version Paints and varnishes - Methods of exp
6、osure to laboratory light sources - Part 3: Fluorescent UV lamps (ISO 16474-3:2013) Peintures et vernis - Mthodes dexposition des sources lumineuses de laboratoire - Partie 3: Lampes fluorescentes UV (ISO 16474-3:2013) Beschichtungsstoffe - Knstliches Bestrahlen oder Bewittern in Gerten - Teil 3: UV
7、-Fluoreszenzlampen (ISO 16474-3:2013) 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 of a national standard without any alteration. Up
8、-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). A version in any other language made by trans
9、lation 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, Cyprus, Czech Republic, Denmark, Estonia, Finlan
10、d, 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 Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
11、 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 ISO 16474-3:2013 EEN ISO 16474-3:2013 (E) 3 Forewo
12、rd This document (EN ISO 16474-3:2013) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ 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 standar
13、d, either by publication of an identical text or by endorsement, at the latest by May 2014, and conflicting national standards shall be withdrawn 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/o
14、r CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11507:2007. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria
15、, Belgium, Bulgaria, Croatia, 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,
16、Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16474-3:2013 has been approved by CEN as EN ISO 16474-3:2013 without any modification. BS EN ISO 16474-3:2013ISO 16474-3:2013(E)Contents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definiti
17、ons . 14 Principle 25 Apparatus . 35.1 Laboratory light source . 35.2 Test chamber 65.3 Radiometer . 65.4 Black-standard/black-panel thermometer . 65.5 Wetting and humidity . 75.6 Specimen holders . 75.7 Apparatus to assess changes in properties 76 Test specimens (panels) . 76.1 General . 76.2 Prepa
18、ration and coating 86.3 Drying and conditioning . 86.4 Thickness of coating . 86.5 Number of test panels . 87 Test conditions . 87.1 Radiation 87.2 Temperature 87.3 Relative humidity of chamber air . 97.4 Condensation and spray cycles . 97.5 Complex cycles with dark periods . 97.6 Sets of exposure c
19、onditions . 98 Procedure and mounting of the test specimens .108.1 General 108.2 Exposure 108.3 Measurement of radiant exposure 118.4 Determination of changes in properties after exposure 119 Test report 11Annex A (informative) Spectral distribution of radiation for typical fluorescent UV lamps 12Bi
20、bliography .16 ISO 2013 All rights reserved iiiBS EN ISO 16474-3:2013ISO 16474-3:2013(E)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 t
21、hrough ISO technical 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 colla
22、borates closely with 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 approva
23、l criteria needed 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 subj
24、ect of patent rights. 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
25、 name used in this 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 Tech
26、nical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.This first edition of ISO 16474-3, together with ISO 16474-1 cance
27、ls and replaces ISO 11507:2007, which has been technically revised. ISO 16474 consists of the following parts, under the general title Paints and varnishes Methods of exposure to laboratory light sources: Part 1: General guidance Part 2: Xenon-arc lamps Part 3: Fluorescent UV lamps Part 4: Open-flam
28、e carbon-arc lampsThis corrected version of ISO 16474-3:2013 incorporates the following corrections. In 7.4, “method B” has been replaced by “method A, cycle No. 2”. In 7.6, “(method A)” has been replaced by “(method A, cycle No. 1)” and “(method B)” has been replaced by “(method A, cycle No. 2)”.iv
29、 ISO 2013 All rights reservedBS EN ISO 16474-3:2013ISO 16474-3:2013(E)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
30、natural weathering or behind window glass. ISO 2013 All rights reserved vBS EN ISO 16474-3:2013Paints and varnishes Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps1 ScopeThis part of ISO 16474 specifies methods for exposing coatings to fluorescent UV lamps, heat and wate
31、r in apparatus designed to reproduce the weathering effects that occur when materials are exposed in actual end-use environments to daylight, or to daylight through window glass.The coatings are exposed to different types of fluorescent UV lamps under controlled environmental conditions (temperature
32、, humidity and/or water). Different types of fluorescent UV lamp may be used to meet all the requirements for testing different materials.Specimen preparation and evaluation of the results are covered in other ISO documents for specific materials.General guidance is given in ISO 16474-1.NOTE Fluores
33、cent UV lamp exposures for plastics are described in ISO 4892-3.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the
34、 latest edition of the referenced document (including any amendments) applies.ISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thicknessISO 4618, Paints and varnishes Terms and definitionsISO 9370, Plastics Instrumental determination of r
35、adiant 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 definitions given in ISO 4618 and the following
36、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=dINTERNATIONAL STANDARD ISO 16474-3:2013(E) ISO 2013 All rights reserved 1BS EN ISO 16474-3:2013ISO 16474-3:2013(E)whereH is the radiant exposure, i
37、n joules per square metre;E is the irradiance, in watts per square metre;t is the exposure time, in secondsNote 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 Fluorescent UV lamps, when p
38、roperly maintained, can be used to simulate the spectral irradiance of daylight in the ultraviolet (UV) region of the spectrum.4.2 Specimens are exposed to various levels of UV radiation, heat and moisture (see 4.4) under controlled environmental conditions.4.3 The exposure conditions may be varied
39、by selection of:a) the type of fluorescent lamp (spectral power distribution);b) the irradiance level;c) the temperature during the UV exposure;d) the relative humidity of the chamber air during the light and dark exposures, when test conditions requiring control of humidity are used;NOTE Commercial
40、 fluorescent UV lamp devices mostly do not provide means of relative humidity control.e) the type of wetting (see 4.4);f) the wetting temperature and cycle;g) the timing of the UV/dark cycle.4.4 Wetting is usually produced by condensation of water vapour onto the exposed specimen surface or by spray
41、ing the test specimens with demineralized/deionized water.4.5 The procedure(s) may include measurement of the irradiance and the radiant exposure in the plane of the specimen.4.6 It is recommended that a similar material of known performance (a control) be exposed simultaneously with the test specim
42、ens to provide a standard for comparative purposes.4.7 Intercomparison of results obtained from specimens exposed in different apparatus or to different types of lamp should not be made unless an appropriate statistical relationship has been established between the different types of equipment for t
43、he material to be tested.2 ISO 2013 All rights reservedBS EN ISO 16474-3:2013ISO 16474-3:2013(E)5 Apparatus5.1 Laboratory light source5.1.1 Fluorescent UV lamps are fluorescent lamps in which radiant emission in the ultraviolet region of the spectrum, i.e. below 400 nm, makes up at least 80 % of the
44、 total light output. There are three types of fluorescent UV lamp used in this part of ISO 16474: Type 1A (UVA-340) fluorescent UV lamp: These lamps have a radiant emission below 300 nm of less than 1 % of the total light output, have an emission peak at 343 nm, and are more commonly identified as U
45、VA-340 for simulation of daylight from 300 nm to 340 nm (see Table 1, column A.1). Figure A.1 is a graph of spectral irradiance from 250 nm to 400 nm of a typical type 1A (UVA-340) fluorescent lamp compared to daylight. Type 1B (UVA-351) fluorescent UV lamp: These lamps have a radiant emission below
46、 310 nm of less than 1 % of the total light output, have a peak emission at 353 nm, and are more commonly identified as UVA-351 for simulation of the UV portion of daylight behind window glass (see Table 2). Figure A.2 is a graph of spectral irradiance from 250 nm to 400 nm of a typical type 1B (UVA
47、-351) fluorescent UV lamp compared to daylight filtered by window glass. Type 2 (UVB-313) fluorescent UV lamp: These lamps are more commonly identified as UVB-313 and have a radiant emission below 300 nm that is more than 10 % of the total output and a peak emission at 313 nm (see Table 3). Figure A
48、.3 is a graph of the spectral irradiance from 250 nm to 400 nm of two typical type 2 (UVB-313) fluorescent lamps compared to daylight. Type 2 (UVB-313) lamps may be used only by agreement between the parties concerned. Such agreement shall be stated in the test report.NOTE 1 Type 2 (UVB-313) lamps h
49、ave a spectral distribution of radiation which peaks near the 313 nm mercury line and might emit radiation down to = 254 nm, which can initiate ageing processes that never occur in end-use environments.NOTE 2 The solar spectral irradiance for a number of different atmospheric conditions is described in CIE No. 85.2The benchmark daylight used in this part of ISO 16474 is from CIE No. 85:1989, Table 4.5.1.2 Unless otherwise specified, type 1A (UVA-340) fluorescent UV lamps or corresponding type 1A fluorescent UV lamp combinati
