ISO INTERNATIONAL STANDARD 16773-2 Secondedition 2016-04-01 Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 2: Collection of data Spectroscopie d'impédance électrochimique (SIE) sur des éprouvettes métalliquesrevetues etnonrevetues- Partie 2: Recueil des données Reference number ISO 16773-2:2016(E) ISO International Organization for Standardization @ IS0 2016 ZHEJIANG INSTOFSTANDARDIZATION C15956617 vided by IHS underI ted without license from IHS IS0 16773-2:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair PrganizationforStandardization ensee-ZHEJIANG INST OF STANDARDIzARoISQ16- All rights reserved etworking permitted without license from IHS IS0 16773-2:2016(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle 5 Electrochemical cell .2 5.1 General. .2 5.2 Electrodes. .3 5.3 Exposedarea .3 5.4 Electrolyte. .3 6 Procedure. ..4 6.1 Grounding. 4 6.2 Shielding.. .4 6.3 Cell cable ground contacts 4 6.4 Local conditions .4 6.5 Measurement equipment characteristics .5 6.6 Confidence test. .5 6.6.1 General .5 6.6.2 Use of interlaboratory test cells for confidence test .6 6.6.3 Error estimate and accuracy. ..6 6.7 Specimens .6 6.7.1 Preconditioning of specimens. ..6 6.7.2 Environmental control .6 6.8 Evaluation of laboratory and field coating specimens ..6 6.9 Number of specimens and repeatability of results .7 7 Instrumental parameters. .7 7.1 General .7 7.2 Conditioning potential and conditioning time .8 7.3 Frequency spectrum. .8 7.4 Data point spacing and points per decade 7.5 D.C. potential control. 8 7.6 Amplitude of perturbation. .9 7.7 Current range settings 9 7.8 Data averaging settings. .9 8 Data presentation. ..9 8.1 General .9 8.2 Bode plot. 8.3 Nyquist plot .10 9 Exchange file format ..11 10 Test report ..11 Annex A (informative) Determination of maximum measurable impedance with the open- lead test. ..13 Annex B (normative) Data exchange file format .15 Annex C (informative) Considerations about the precise determination of the exposed area.. ...9. Bibliography .24 iii ee=ZHEJIANG INSTOFSTANDARDIZATION C15956617 ed withoutlicense from IHS