1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4593:2011Aerospace series Paints andvarnishes Determination ofsolar absorptanceBS EN 4593:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementati
2、on of EN 4593:2011.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes(excluding textiles).A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport
3、to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 73663 6ICS 49.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Poli
4、cy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate Text affectedBS EN 4593:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4593 June 2011 ICS 49.040 English Version Aerospace series - Paints and varnishes - Determination of solar absorptance Srie arospatiale -
5、 Peintures et vernis - Dtermination de labsorption solaire Luft- und Raumfahrt - Beschichtungsstoffe - Bestimmung der Sonnenlichtabsorption This European Standard was approved by CEN on 19 February 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the co
6、nditions 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 exi
7、sts 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 notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national st
8、andards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, 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 an
9、d United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4593:2
10、011: EBS EN 4593:2011EN 4593:2011 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Definitions 4 4 Principle 4 5 Apparatus .4 6 Specimens 5 7 Procedure .5 8 Calculation 5 9 Supplementary information 6 10 Test report 6 11 Designation 6 BS EN 4593:2011EN 4593:2011 (E) 3 Foreword Thi
11、s document (EN 4593:2011) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the
12、 Official Services of the member countries of ASD, prior to its presentation to CEN. 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 December 2011, and conflicting national standards shall be with
13、drawn at the latest by December 2011. 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. According to the CEN/CENELEC Internal Regulation
14、s, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N
15、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4593:2011EN 4593:2011 (E) 4 1 Scope This European Standard specifies the method of test for determining the solar absorptance of paints and varnishes. The test procedure determ
16、ines the amount of energy reflected by the material in the range of wavelengths at which there is energy from the sun hitting the Earths surface, and with the aid of a standard solar spectrum it allows a calculation to determine the solar absorptance which can then be used to determine the efficienc
17、y of solar heat reflecting paints. The procedure is applicable to products intended for use in aerospace applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
18、eferences, the latest edition of the referenced document (including any amendments) applies. EN 23270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing (ISO 3270:1984) EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Samp
19、ling (ISO 15528:2000) EN ISO 1513, Paints and varnishes Examination and preparation of test samples (ISO 1513:2010) EN ISO 2808, Paints and varnishes Determination of film thickness (ISO 2808:2007) CIE publ No 85, Solar spectral irradiance 3 Definitions For the purposes of this document, the followi
20、ng terms and definitions apply. 3.1 solar absorptance proportion of the energy emitted by the sun which hits the Earths surface which is absorbed by the material under test 4 Principle The reflectance of specimens, comprising of coated test panels is measured and summated over the range of solar ene
21、rgy which hits the Earths surface through two air masses, allows the calculation of solar absorptance. 5 Apparatus A recording spectrophotometer fitted with an integrating sphere which has the specular component included, a 10/diffuse measuring geometry and is capable of meeting the following requir
22、ements. Measuring range: 300 nm to 2 300 nm Wavelength accuracy: 5 nm Measuring accuracy: 2 % BS EN 4593:2011EN 4593:2011 (E) 5 Bandpass: 4 nm Replace (23 2) C and (50 5) % relative humidity with EN 23270, where applicable. 6 Specimens Take a representative sample of the product to be tested or of e
23、ach component in the case of a multi-coat system as described in EN ISO 15528. Examine and prepare each sample for testing as described in EN ISO 1513. The test panels shall be of a size suitable for the performance of the tests identified by this and the product standard. Coat the test panels with
24、the test product as specified by the product standard. Dry/cure the coating for the time and under the conditions specified in the product standard. The coating thickness, when determined using one of the non destructive procedures specified in EN ISO 2808 shall comply with the requirements of the p
25、roduct standard. Condition the test panels at a temperature and at a relative humidity of EN 23270 for a minimum of 16 h and a maximum of 72 h prior to testing. 7 Procedure Measure and record the reflectance spectrum using the reflectance grade barium sulphate as the reflectance standard on the spec
26、trophotometer in the wavelength range 300 nm to 2 300 nm. 8 Calculation Unless specified, use the solar spectral irradiance data (CIE publ No 85) through 2 air masses, 0,2 nm optical depth at 50 nm, 0,3 cm ozone and 2,0 cm precipitable water. Calculate the solar absorptance using the following equat
27、ion: =30023003002300100100m)(sR where (s) is the solar absorptance; Rmis the measured reflectance of paint, as a percentage; is the solar irradiance, in watt per square metre. BS EN 4593:2011EN 4593:2011 (E) 6 9 Supplementary information In the performance of this test standard there is a requiremen
28、t for supplementary information to be provided by the product standard for the material under test. This information consists of: a) substrate type and method of preparation; b) method of application of the coating including, where applicable, the duration and conditions of drying/curing between coa
29、ts in the case of multi-coat systems; c) duration and conditions of drying/curing of the final coat before test; d) thickness of the dry coating or combination of coatings in micrometres; e) properties of the coating to be evaluated following exposure; f) number of air masses to employ for standard
30、solar spectrum. 10 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested; b) a reference to this test standard; c) a reference to the product standard; d) the items of supplementary information (see clause 9); e) the res
31、ults of the test work in terms of the stated requirements; f) any deviation from the test method specified; g) the date(s) of the test; h) name of the operator. 11 Designation EXAMPLE Description blockDETERMINATION OF SOLAR ABSORPTANCE Identity block EN 4593 Number of this standard This page deliber
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