IEC_TS_62073-2016.pdf

IEC TS 62073 Edition 2.0 2016-02 TECHNICA L SPECIFICA TION Guidance on the measurement of hy drophobicity of insulator surfaces IEC TS 62073:2016-02(en)Copyright International Electrotechnical Commission THIS PUBLICATION IS COPYRIGHT PROTECTED Copyr ight 2016 IEC,Geneva,Switzer land All r ights r eserved.Unless otherwise specif ied,no par t of this publication may be reproduced or utilized in any f orm or by any means,electr onic or mechanical,including photocopying and microfilm,without permission in writing f rom either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee f or fur ther information.IEC Central Office Tel.:+41 22 919 02 11 3,r ue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzer land www.iec.ch About the IEC The Inter national Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standar ds f or all electr ical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sur e that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/cat alogue The stand-alone application for consulting the entir e bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publicat ions search-w w w.iec.ch/sear chpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdraw n publications.IEC Just Published-webstore.iec.ch/just published Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionar y of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 15 additional languages.Also known as the International Electrotechnical Vocabular y (IEV)online.IEC Glossar y -st d.iec.ch/glossar y 65 000 electrotechnical terminology entries in English and French ex tracted from the Ter ms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Cust omer Ser v ice Centre-webst ore.iec.ch/csc If you wish to give us y our feedback on this publication or need fur ther assistance,please contact the Customer Service Centre:csciec.ch.Copyright International Electrotechnical Commission IEC TS 62073 Edition 2.0 2016-02 TECHNICA L SPECIFICA TION Guidance on the measurement of hy drophobicity of insulator surfaces INTER NATIONA L ELECTROTECHNICA L COMMISSION ICS 29.080.10 ISBN 978-2-8322-3169-2 Registered t rademark of t he Int ernational Electrot echnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.Copyright International Electrotechnical Commission 2 IEC TS 62073:2016 IEC 2016 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Terms and def initions.7 3 Methods f or measurement of hydrophobic properties.9 3.1 General.9 3.2 Method A Contact angle method.9 3.2.1 General.9 3.2.2 Equipment.9 3.2.3 Measurement procedure.9 3.2.4 Static contact angle measurements.10 3.2.5 Dynamic contact angle measurements.10 3.2.6 Evaluation.10 3.3 Method B Surf ace tension method.11 3.3.1 General.11 3.3.2 Saf ety precautions.11 3.3.3 Equipment and reagents.11 3.3.4 Measurement procedure.12 3.3.5 Evaluation.12 3.4 Method C The spray method.12 3.4.1 General.12 3.4.2 Equipment.12 3.4.3 Measurement procedure.13 3.4.4 Evaluation.13 3.5 Documentation.14 Annex A(normative)Guidelines regarding the applicability and comments on the limitations of the dif f erent methods described in this technical specif ication.15 A.1 General.15 A.2 Typical results obtained with the three methods.15 Annex B(normative)Method A Contact angle method.17 Annex C(normative)Method B Surf ace tension method.18 Annex D(normative)Method C Spray method.20 Figure 1 Def inition of the static contact angle.8 Figure 2 Def inition of the advancing angle(a)and the receding angle(r)inside a liquid drop resting on an inclined solid surf ace.8 Figure 3 Measurements of the advancing angle(a)and the receding angle(r)by adding or withdrawing water f rom a droplet.10 Figure B.1 Measurement of the advancing angle(a)and the receding angle(r)by using the captive bubble technique.17 Figure D.1 Examples of surf aces with hydrophobicity class(HC)f rom 1 to 6.20 Table 1 Criteria f or the determination of hydrophobicity class(HC).14 Copyright International Electrotechnical Commissi