1、BSI Standards PublicationBS EN ISO 16474-2:2013Paints and varnishes Methods of exposure tolaboratory light sourcesPart 2: Xenon-arc lamps (ISO16474-2:2013)Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking pe
2、rmitted without license from IHS-,-,-BS EN ISO 16474-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 16474-2:2013. Together with BS EN ISO 16474-1:2013, it supersedes BS EN ISO 11341:2004, which is withdrawn.The UK participation in its preparation was
3、 entrusted to Technical Committee 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 applicati
4、on. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 71944 8 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
5、 on 31 January 2014.Amendments/corrigenda issued since publicationDate Text affectedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE
6、EUROPISCHE NORM EN ISO 16474-2 November 2013 ICS 87.040 English 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 (
7、ISO 16474-2:2013) Beschichtungsstoffe - Knstliches 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
8、 for giving this European Standard the status of 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 t
9、hree 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 notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards
10、bodies of Austria, 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
11、, Spain, Sweden, Switzerland, Turkey and United 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 wor
12、ldwide for CEN national Members. Ref. No. EN ISO 16474-2:2013 ECopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16474-2:2013EN ISO 16474-2:2013 (E) 3 Forewor
13、d 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” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard
14、, 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/or
15、 CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11341:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
16、 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, S
17、witzerland, 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 without any modification. Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or net
18、working permitted without license from IHS-,-,-BS EN ISO 16474-2:2013ISO 16474-2:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Apparatus . 35.1 Laboratory light source . 35.2 Test chamber 45.
19、3 Radiometer . 55.4 Black-standard/black-panel thermometer . 55.5 Wetting and humidity-control equipment 55.6 Specimen holders . 55.7 Apparatus to assess changes in properties 66 Test specimens 67 Exposure conditions . 67.1 Radiation 67.2 Temperature 67.3 Relative humidity of chamber air . 77.4 Spra
20、y cycle 87.5 Cycles with dark periods 87.6 Sets of exposure conditions . 98 Procedure. 98.1 General . 98.2 Mounting the test specimens 98.3 Exposure . 98.4 Duration of test 108.5 Measurement of radiant exposure 108.6 Determination of changes in properties after exposure 109 Test report 10Annex A (in
21、formative) Filtered xenon-arc radiation Spectral power distribution 11Annex B (normative) Additional exposure cycles 13Bibliography .15Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without lice
22、nse from IHS-,-,-BS EN ISO 16474-2:2013ISO 16474-2:2013(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 through ISO technical committee
23、s. 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 collaborates closely with the Inter
24、national 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 approval criteria needed for the diff
25、erent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not
26、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. www.iso.org/patentsAny trade name used in this document is information
27、 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 Technical Barriers to Trade (TBT) see the foll
28、owing 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 16474-2, together with ISO 16474-1, cancels and replaces ISO 11341:2004 which has
29、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-flame carbon-arc lampsiv ISO 2013 All rights r
30、eservedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16474-2:2013ISO 16474-2:2013(E)IntroductionCoatings of paints, varnishes and similar materials (subse
31、quently 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 under glass cover. ISO 2013 All rights reserved vCopyright British Standards Institution Provide
32、d by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16474-2:2013Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking
33、permitted without license from IHS-,-,-BS EN ISO 16474-2:2013Paints and varnishes Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps1 ScopeThis part of ISO 16474 specifies methods for exposing specimens to xenon-arc light in the presence of moisture to reproduce the weathering e
34、ffects that occur when materials are exposed in actual end-use environments to daylight 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
35、filter combinations may be used to meet all the requirements for testing different materials.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 descr
36、ibed in ISO 4892-2.2 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 latest edition of the referenced document (i
37、ncluding any amendments) applies.ISO 4618, Paints and varnishes Terms and definitionsISO 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: G
38、eneral guidance3 Terms and definitionsFor the purposes of this document, the terms and 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 .INTERNATIO
39、NAL STANDARD ISO 16474-2:2013(E) ISO 2013 All rights reserved 1Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16474-2:2013ISO 16474-2:2013(E)whereH is the
40、radiant exposure, in joules per 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
41、arc, fitted with suitable filters 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
42、4.4) under controlled environmental 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
43、control of humidity are used;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 o
44、nto the surfaces of the specimens.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 f
45、or comparative purposes.4.7 Intercomparison 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.2 ISO 2013 All rights reservedCopyrigh
46、t British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16474-2:2013ISO 16474-2:2013(E)5 Apparatus5.1 Laboratory light source5.1.1 GeneralThe light source shall comprise on
47、e 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-wavelength UV radiation (method A, see Table 1). Filters to minimize irradiance
48、 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 specimens, 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 Spectral irradiance of
