1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58measurement of resistance to cold crack temperature cycleThe European Standard EN 4170:2007 has the
2、 status of a British StandardICS 49.040Aerospace series Paints and varnishes Test method for BRITISH STANDARDBS EN 4170:2007BS EN 4170:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 2007ISBN 978 0 580 58251 6Amendments
3、 issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard is the UK implementation of EN 4170:2007.The UK participation in its prep
4、aration 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.This publication does not purport to include all the
5、necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 4170July 2007ICS 49.040English VersionAerospace series - Paints and varnishes - Test method formeasurement of resistance to cold crack temperature cycleSrie arospatiale - Peintures et vernis - Mthode de testpour mesurer la r
6、sistance aux cycles de bassetempratureLuft- und Raumfahrt - Anstrichstoffe - Bestndigkeit gegenthermische KreislufeThis European Standard was approved by CEN on 13 April 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
7、peanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English,
8、 French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cypru
9、s, 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT E
10、UROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4170:2007: E2 Contents Page Foreword3 1 Scope 4 2 Principle4 3 Apparatus
11、 .4 4 Specimen 4 5 Procedure .4 5.1 General4 5.2 Cold crack cycle.5 6 Results 6 7 Designation 6 8 Test report 6 Bibliography 7 EN 4170:20073 Foreword This document (EN 4170:2007) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enqui
12、ries 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, prior to its presentation to CEN. This European Standard shall be given the status of a national
13、 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 drawn to the possibility that some of the elements of this document may be the subject of patent r
14、ights. 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 following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus,
15、 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 and the United Kingdom. EN 4170:20074 1 Scope This standard desc
16、ribes a procedure of ageing to assess the resistance of a coated panel (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 c
17、rack formation, peeling or other defects due to modification of the 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 pai
18、nt itself). Generally failures occurring are: loss of adhesion; cracks 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
19、 or other required cycle. 4 Specimen The panels for the determination 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 instruction
20、s (viscosity, overcoating time). 5 Procedure 5.1 General After the 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 panel
21、s. Unless otherwise the duration of the test is defined by the number of cycles: 30. EN 4170:20075 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 Key = rate: 1 and 4: (2 R 3) C/min 2 and 3: 10 C/min Figure 1 All tempe
22、ratures 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 of 2-30 C/min, the atmosphere is cooled to 55 C, the temperature is contr
23、olled 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 controlled for 2 hours at ( 55 1) C, the atmosphere is heated up to (50 1) C a
24、nd (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 C1423EN 4170:20076 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 EXAM
25、PLE Description block RESISTANCE TO THERMAL CYCLES Identity block EN4170 Number of 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)
26、thickness of the dry film; k) thickness of the different layers; l) results; m) results and requirements; n) gloss; o) colour; p) defects. EN 4170:20077 Bibliography 1 ISO 1513, Paints and varnishes Examination and preparation of samples for testing. 2 ISO 3696, Water for analytical laboratory use S
27、pecification and test methods. EN 4170:2007BS EN BSI389 Chiswick High RoadLondonW4 4AL4170:2007BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incor
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