1、TECHNICALSPECIFICATIONIEC TS 62073First edition2003-06Guidance on the measurement of wettabilityof insulator surfacesMesure de lhydrophobicitde la surface des isolateursReference numberIEC/TS 62073:2003(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY B
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8、chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICALSPECIFICATIONIECTS 62073First edition2003-06Guidance on the measurement of wettabilityof insulator surfacesMesure de lhydrophobicitde la
9、 surface des isolateursPRICE CODE IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical C
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11、I/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 62073 IEC:2003(E)CONTENTSFOREWORD.4INTRODUCTION.61Scope and object.72Terms and definitions.73Methods for measurement of wetting properties.94Method A Contact angle method.104.1General.104.2Equipment.104.3Measuremen
12、t procedure.104.4Evaluation.115Method B Surface tension method.115.1General.115.2Safety precautions.125.3Equipment and reagents.125.4Measurement procedure.125.5Evaluation.136Method C The spray method.136.1General.136.2Equipment.136.3Measurement procedure.136.4Evaluation.147Documentation.15Annex A(no
13、rmative)Guidelines regarding the applicability and comments on thelimitations of the different methods described in this technical specification.16Annex B(normative)Method A Contact angle method.18Annex C(normative)Method B Surface tension method.19Annex D(normative)Method C Spray method.21Figure 1
14、Definition of the static contact angle.8Figure 2 Definition of the advancing angle(a)and the receding angle(r)inside a liquid drop resting on an inclined solid surface.9Figure 3 Measurements of the advancing angle(a)and the receding angle(r)by adding or withdrawing water from a droplet.11Figure B.1
15、Measurement of the advancing angle(a)and the receding angle(r)by using the captive bubble technique.18LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TS 62073 IEC:2003(E)3 Table 1 Criteria for the determination of wettability class(WC)
16、.14Table C.1 Concentrations of ethylene-glycol-monoethyl-ether(cellosolve),formamidemixtures used in measuring surface tension of insulator surfaces in the range 30 mN/mto 56 mN/m(T=20 C).19Table C.2 Concentrations of distilled water and formamide mixture used in measuringsurface tension of insulator surfaces in the range 58 mN/m to 73 mN/m(T=20 C).20Table C.3 Concentrations of distilled water and sodium chloride in mixtures usedin measuring surface tension of insulator surfaces in the range 73
