1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Paints and varnishes - Determination of resistance to humidityPart 2: Condensation (in-cabinet exposure with heated water reservoir)BS EN ISO 6270-2:2018National forewordThis British Standard is the UK implementation of
2、 EN ISO 6270-2:2018. It is identical to ISO 6270-2:2017. It supersedes BS EN ISO 6270-2:2005, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on this committee can be obtained on reque
3、st 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 Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94861 9ICS 87.040Compliance with a British Stan
4、dard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 6270-2:2018EUROPEAN STANDARDNORME EU
5、ROPENNEEUROPISCHE NORMEN ISO 6270-2January 2018ICS 87.040 Supersedes EN ISO 6270-2:2005EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 6270-2:2018: EAll rights
6、of exploitation in any form and by any means reserved worldwide for CEN national MembersPaints and varnishes - Determination of resistance to humidity - Part 2: Condensation (in-cabinet exposure with heated water reservoir) (ISO 6270-2:2017)Peintures et vernis - Dtermination de la rsistance lhumidit
7、 - Partie 2: Condensation (exposition en enceinte avec rservoir eau chauffe) (ISO 6270-2:2017)Beschichtungsstoffe - Bestimmung der Bestndigkeit gegen Feuchtigkeit - Teil 2: Kondensation (Beanspruchung in einer Klimakammer) (ISO 6270-2:2017)This European Standard was approved by CEN on 25 November 20
8、17.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-to-date lists and bibliographical references concerning such national standards may be obtained o
9、n 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENEL
10、EC 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, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
11、 Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 6270-2:2018 (E)European forewordThis document (EN ISO 6270-2:2018) has been prepared by Technical Committee I
12、SO/TC 35/SC 9 “General test methods for 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, either by publication of an identical text or by
13、endorsement, at the latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all
14、 such patent rights.This document supersedes EN ISO 6270-2:2005.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, Croatia, Cyprus, Czech Republic, Denmark, Esto
15、nia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noti
16、ceThe text of ISO 6270-2:2017 has been approved by CEN as EN ISO 6270-2:2018 without any modification.2BS EN ISO 6270-2:2018ISO 6270-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Designation 15 Limitations 26 Principle 27 Test atmospheres . 28 Appa
17、ratus . 38.1 Climatic chamber 38.2 Installation of the climatic chamber . 48.3 Device for accommodating the test specimens . 49 Procedure. 49.1 Filling the floor trough . 49.2 Test specimens 59.3 Arrangement of the test specimens 59.4 Determination of the comparison quantity of condensation water .
18、59.5 Test sequence . 59.5.1 Start-up 59.5.2 Condensation atmosphere with constant humidity (CH). 69.5.3 Condensation atmosphere with alternation of humidity and air temperature (AHT) 69.5.4 Condensation atmosphere with alternation of air temperature (AT) . 69.6 Interruptions 69.7 End of test 610 Eva
19、luation 611 Precision . 712 Test report . 7Bibliography 8 ISO 2017 All rights reserved iiiContents PageBS EN ISO 6270-2:2018ISO 6270-2:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepa
20、ring International Standards is normally carried out through 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 l
21、iaison with ISO, also take part in the work. ISO collaborates 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 D
22、irectives, Part 1. In particular the different approval 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
23、 some of the elements of this document may be the subject 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 dec
24、larations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity
25、assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
26、 General test methods for paints and varnishes.This second edition cancels and replaces the first edition (ISO 6270-2:2005), which has been technically revised.The main changes compared to the previous edition are as follows: a principle clause has been added; the terms and definitions clause has be
27、en added; a limitations clause concerning the use of other than standard test conditions has been added; the recommendation to use distilled or deionized water for filling the trough has been changed; a requirement has been added to make sure that condensation forms on all test specimens; a method f
28、or the determination of the comparison quantity of condensation water has been added; information on precision has been added; the normative references have been updated.A list of all parts in the ISO 6270 series can be found on the ISO website.iv ISO 2017 All rights reservedBS EN ISO 6270-2:2018ISO
29、 6270-2:2017(E)IntroductionThis document is intended to give consistent conditions and procedures for the conditioning of pre-prepared test specimens which are to be evaluated for defects, which may develop when they are subjected to humid ambient atmospheres such as constant condensation-water atmo
30、spheres or alternating condensation-water atmospheres.The tests are designed to clarify the behaviour of the test specimens in humid ambient atmospheres, and to pinpoint any defects in the protection of the test specimens against corrosion. The testing of coatings in these atmospheres does not neces
31、sarily give lifetime prediction data.After conditioning, the test specimens are evaluated either in accordance with agreed documents, such as the appropriate part(s) of ISO 46281or by procedures agreed between the interested parties. ISO 2017 All rights reserved vBS EN ISO 6270-2:2018This page delib
32、erately left blankPaints and varnishes - Determination of resistance to humidity Part 2: Condensation (in-cabinet exposure with heated water reservoir)1 ScopeThis document specifies the general conditions and procedures which need to be observed when testing coated test specimens in constant condens
33、ation-water atmospheres or in alternating condensation-water atmospheres, in order to ensure that the results of tests carried out in different laboratories are reproducible.NOTE The shape and preparation of the test specimens, the duration of the test and the assessment of the test results are not
34、covered in this document.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
35、nced document (including any amendments) applies.ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testingISO 4618, Paints and varnishes Terms and definitions3 Terms and definitionsFor the purposes of this document, the terms and definitions give
36、n in ISO 4618 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 DesignationThe condensation-water test atmospheres are
37、 designated as follows:Test atmosphere CH Condensation atmosphere with constant humidityAHT Condensation atmosphere with alternating humidity and air temperatureAT Condensation atmosphere with alternating air temperatureINTERNATIONAL STANDARD ISO 6270-2:2017(E) ISO 2017 All rights reserved 1BS EN IS
38、O 6270-2:2018ISO 6270-2:2017(E)5 LimitationsTemperature and humidity are important parameters affecting test results. Deviations from the requirements specified can lead to results that are not comparable. However, the interested parties may agree upon alternative parameters and these parameters sha
39、ll be reported.6 PrincipleA coated test specimen is exposed to condensation in a climatic chamber, and the effects of the exposure are evaluated by criteria agreed in advance between the interested parties, these criteria usually being of a subjective nature.7 Test atmospheresCondensation-water test
40、 atmospheres promote the condensation of atmospheric humidity on the surfaces of test specimens, the temperatures of which are lower than the temperature of the saturated air in the climatic chamber, due to radiation onto the chamber walls or to the cooling of the test specimen.The atmospheric tempe
41、rature in the climatic chamber during the condensation process described in this document is (40 3) C.The condensation-water test atmosphere may be either a constant-humidity (CH) or an alternating (AHT, AT) atmosphere. If, in addition to the action of the condensation water, the change in atmospher
42、ic temperature and the change in atmospheric humidity have an important effect on the test specimens, an alternating atmosphere should be chosen.The quantity of condensation water formed on the surface of the coating may also exercise an important influence on the action of the water; this quantity
43、will be affected by the ambient temperature in the installation room or by the cooling of the test specimen.The condensate which drips off the test specimens consists of condensation water and also, in some instances, of solid and liquid constituents of the coating dissolved in the condensation wate
44、r or mixed with it.Reproducible results can only be expected if the test procedure and test conditions remain constant for a series of tests.In the case of alternating atmospheres, a cycle time of 24 h shall be used as a general rule. A shorter cycle time (12 h or 16 h) and a correspondingly shorten
45、ed time for the two test periods may be used for the AT test atmosphere.A summary of test atmospheres, cycle durations and conditions is given in Table 1. Other cycles may be used by agreement between the interested parties.2 ISO 2017 All rights reservedBS EN ISO 6270-2:2018ISO 6270-2:2017(E)Table 1
46、 Condensation test atmospheresTest atmosphere Cycle durationConditions in working chamber after reaching equilibriumType Code Test period(s) TotalAir temperatureRelative humidityConstant-humidity condensation atmosphereCHFrom warm-up to end of exposure (40 3) CApprox. 100 % with condensa-tion on tes
47、t specimensAlternat-ing con-densation atmos-phereWith alter-nation of humidity and air tempera-tureAHT8 h including warm-up24 h(40 3) CApprox. 100 % with condensa-tion on test specimens16 h including cooling down (climatic chamber open or ventilated)18 C to 28 C Approaching ambientWith alterna-tion
48、of air tempera-tureAT8 h including warm-up24 h(40 3) CApprox. 100 % with condensa-tion on test specimens16 h including cooling down (climatic chamber closed)18 C to 28 CApprox. 100 % (approximately saturated)NOTE Set points and operational fluctuations can either be listed independently of each othe
49、r, or they can be listed in the format “set point operational fluctuations”. The set point is the target condition for the sensor used at the operational control point as programmed by the user. Operational fluctuations are deviations from the set point at the control point as indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty. At the operational control point, the operational fluctuation may not exceed the listed value at equilibrium. Wh
