ISO INTERNATIONAL STANDARD 16773-4 Secondedition 2017-03 Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 4: Examples of spectra of polymer-coated and uncoated specimens Spectroscopie d'impédance électrochimique (SIE) sur des éprouvettes métalliques revetues et non revetues Partie 4: Exemples de spectres d'éprouvettes revetues de polymeres et nonrevetues Reference number ISO 16773-4:2017(E) [so International Organization for Standardization @ IS0 2017 STANDARDIZATIONC15956617 d without license from IHS IS0 16773-4:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 copyright@iso.org www.iso.org prganizationfor Standardization ensee-ZHEJIANG INST.OF STANDARDIzARoISQa7 - All rights reserved Not for Resale, 2017/5/16 00:43:2 etworking permitted without license from IHS IS0 16773-4:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Theoretical background 4.1 Basic considerations .1 4.2 Examples of models. 4.2.1 Purely capacitive coating 2 4.2.2 Randleseguivalentcircuit 4.2.3 Extended Randles equivalent circuit ..3 Annex A (informative) Examples .5 Annex B (informative) Composition of concentrated artificial rain water ..35 Bibliography .36 Intematonal oganzation@sS2017 -All rights reserved iii =ZHEJIANG INSTOF STANDARDIZATION C15956617 vided by IHS underI Ise with ISC d without license from IHS