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1、BRITISH STANDARD BS EN 4170:2007 Aerospace series Paints and varnishes Test method for measurement of resistance to cold crack temperature cycle The European Standard EN 4170:2007 has the status of a British Standard ICS 49.040 ? Licensed Copy: London South Bank University, London South Bank Univers
2、ity, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 4170:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 2007 ISBN 978 0 580 58251 6 National foreword This British Standard is the UK implementatio
3、n of EN 4170:2007. The UK participation in its preparation was entrusted by Technical Committee ACE/65, Non-metallic materials for aerospace purposes (excluding textiles), to Panel ACE/65/-/3, Paints. A list of organizations represented on this committee can be obtained on request to its secretary.
4、This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: Londo
5、n South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4170 July 2007 ICS 49.040 English Version Aerospace series - Paints and varnishes - Test method for measurement of resistance to
6、cold crack temperature cycle Srie arospatiale - Peintures et vernis - Mthode de test pour mesurer la rsistance aux cycles de basse temprature Luft- und Raumfahrt - Anstrichstoffe - Bestndigkeit gegen thermische Kreislufe This European Standard was approved by CEN on 13 April 2007. CEN members are bo
7、und 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 standards may be obtained on application to the
8、CEN 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 notified to the CEN Management Centre has the same st
9、atus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
10、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved
11、worldwide for CEN national Members. Ref. No. EN 4170:2007: E Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 Contents Page Foreword3 1 Scope 4 2 Principle4 3 Apparatus .4 4 Specimen4 5 Procedure .4 5.1 Genera
12、l4 5.2 Cold crack cycle.5 6 Results6 7 Designation 6 8 Test report6 Bibliography7 EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 Foreword This document (EN 4170:2007) has been prepared by the Ae
13、rospace 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 Official Services of the member countries of ASD, pr
14、ior 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 January 2008, and conflicting national standards shall be withdrawn at the latest by January 2008. Attention is draw
15、n 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 Regulations, the national standards organizations of the followin
16、g countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloveni
17、a, Spain, Sweden, Switzerland and the United Kingdom. EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 4 1 Scope This standard describes a procedure of ageing to assess the resistance of a coated pa
18、nel (metallic or organic substrate) to a temperature cycle (cold, hot, hot and wet) for aerospace purposes. This test deals with the assessment of the capability of the paint to support modification of internal stresses without any crack formation, peeling or other defects due to modification of the
19、 mechanical properties of the paint system. 2 Principle The principle of the method is to create, using a temperature cycle (see 5.2), a periodic fatigue of the paint applied on a given substrate (fatigue of the interfaces or the paint itself). Generally failures occurring are: loss of adhesion; cra
20、cks if the energy due to internal stress development is greater than the cohesive strength of the paint; loss of flexibility, gloss; blistering. 3 Apparatus Climatic chamber: capable of reproducing the temperature cycle define in 5.2 or other required cycle. 4 Specimen The panels for the determinati
21、on of the properties after the ageing process are selected and treated according to the material specification. The tests are indicated in the material specification. Paint system is applied according to the manufacturers instructions (viscosity, overcoating time). 5 Procedure 5.1 General After the
22、drying period defined in the material standard: If required gloss and colour are measured using relevant test method; The test panels are exposed vertically in the climatic chamber. A distance of 2 cm should separate successive panels. Unless otherwise the duration of the test is defined by the numb
23、er of cycles: 30. EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 5.2 Cold crack cycle See Figure 1. + 80 temperature (C) + 60 + 40 + 20 0 20 3 6 9 12 15 18 21 24 27 30 33 time (hours) 40 1 cycle
24、 Key = rate: 1 and 4: (2 R 3) C/min 2 and 3: 10 C/min Figure 1 All temperatures are given with an accuracy of 1 C. All relative humidity are given with an accuracy of 10 % RH. The thermal cycle is described hereafter: panels are exposed for 18 hours in a (50 1) C/(90 10) % RH atmosphere, at a rate o
25、f 2-30 C/min, the atmosphere is cooled to 55 C, the temperature is controlled for 2 hours at ( 55 1) C, the ambiance is quickly heated up to (80 1) C at 10 C/min, the temperature is controlled for 2 hours at (80 1) C, at a rate of 10 C/min, the atmosphere is cooled to 55 C, the temperature is contro
26、lled for 2 hours at ( 55 1) C, the atmosphere is heated up to (50 1) C and (90 10) % at a rate of 2 C/min to 3 C/min. 50 C/95 % RH 50 C/95 % RH + 80 C 55 C 55 C 1 4 2 3 EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontr
27、olled Copy, (c) BSI 6 6 Results Requirements and test methods are defined in the material specification. The evaluation of the results and test procedures are described in the relevant test methods. 7 Designation EXAMPLE Description block RESISTANCE TO THERMAL CYCLES Identity block EN4170 Number of
28、the standard 8 Test report a) designation; b) date; c) thermal cycle; d) paint system; e) batch numbers; f) reference; g) application device; h) drying time and temperature, relative humidity; i) overcoating time; j) thickness of the dry film; k) thickness of the different layers; l) results; m) res
29、ults and requirements; n) gloss; o) colour; p) defects. EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 7 Bibliography 1 ISO 1513, Paints and varnishes Examination and preparation of samples for te
30、sting. 2 ISO 3696, Water for analytical laboratory use Specification and test methods. EN 4170:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:20:15 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 4170:2007 BSI 389 Chiswick High Road London W4 4AL BSI B
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