DIN EN ISO 16773-4-2017 Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens - Part 4 Examples of spectra of polymer-coated and uncoated specimens.pdf

1、July 2017 English price group 17No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 87.040!%h8W“2692152www.din.deDIN EN

2、 ISO 16773-4Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 4: Examples of spectra of polymercoated and uncoated specimens (ISO 167734:2017);English version EN ISO 167734:2017,English translation of DIN EN ISO 16773-4:2017-07Elektrochemische Impedanzspektr

3、oskopie (EIS) an beschichteten und unbeschichteten metallischen Proben Teil 4: Beispiele fr Spektren von polymerbeschichteten und unbeschichteten Proben (ISO 167734:2017);Englische Fassung EN ISO 167734:2017,Englische bersetzung von DIN EN ISO 16773-4:2017-07Spectroscopie dimpdance lectrochimique (S

4、IE) sur des prouvettes mtalliques revtues etnon revtues Partie 4: Exemples de spectres dprouvettes revtues de polymres et non revtues (ISO 167734:2017);Version anglaise EN ISO 167734:2017,Traduction anglaise de DIN EN ISO 16773-4:2017-07SupersedesDIN EN ISO 167734:200909www.beuth.deDocument comprise

5、s 44 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.07.17 DIN EN ISO 16773-4:2017-07 2 A comma is used as the decimal marker. National foreword This document (EN ISO 16773-4:2017) has been prepared by Technical Committee ISO/T

6、C 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secretariat: BSI, United Kingdom), in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany), The responsible German body involved in its preparation was DIN-

7、Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Group NA 002-00-07 AK “Electrochemical methods” of Working Committee NA 002-00-07 AA “General test methods for coating materials and coatings”. DIN EN ISO 16773 consists of the fo

8、llowing parts, under the general title Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens: Part 1: Terms and definitions Part 2: Collection of data Part 3: Processing and analysis of data from dummy cells Part 4: Examples of spectra of polymer-coated and uncoated

9、specimens The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 8501-1 DIN EN ISO 8501-1 ISO 16773-1 DIN EN ISO 16773-1 ISO 16773-2:2016 DIN EN ISO 16773-2:2016-12 ISO 16773-3 DIN EN ISO 16773-3 ISO/TR 16208 DIN CEN/TR 16208, DIN SPEC 33928 I

10、EC 80000-6:2008 DIN EN 80000-8:2008-09 Amendments This standard differs from DIN EN ISO 16773-4:2009-09 as follows: a) the introductory element of the title, Paints and varnishes, has been omitted because the Scope has been broadened to include metals and alloys. The main element of the title has be

11、en changed to Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens; b) a reference to ISO/TR 16208 and ASTM G106 has been included for examples of spectra for low-impedance systems (range from e.g. 10 to 1 000 ); c) examples for uncoated specimens have been included

12、. Previous editions DIN EN ISO 16773-4: 2009-09 DIN EN ISO 16773-4:2017-07 3 National Annex NA (informative) Bibliography DIN EN ISO 8501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation

13、grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings DIN EN ISO 16773-1, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 1: Terms and definitions DIN EN ISO 16773-2:2016-12, Electrochemical impedance spectr

14、oscopy (EIS) on coated and uncoated metallic specimens Part 2: Collection of data (ISO 16773-2:2007) DIN EN ISO 16773-3, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 3: Processing and analysis of data from dummy cells DIN CEN/TR 16208, DIN SPEC 33928, B

15、iobased products Overview of standards DIN EN ISO 80000-8:2008-09, Quantities and units Part 8: Acoustics (IEC 80000-6:2008) DIN EN ISO 16773-4:2017-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16773-4 April 2017 ICS 87.040 Supersedes EN ISO 16773-4:

16、2009English Version Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens - Part 4: Examples of spectra of polymer-coated and uncoated specimens(ISO 16773-4:2017) Spectroscopie dimpdance lectrochimique (SIE) sur des prouvettes mtalliques revtues et non revtues -Parti

17、e 4: Exemples de spectres dprouvettes revtues de polymres et non revtues (ISO 16773-4:2017) Elektrochemische Impedanzspektroskopie (EIS) an beschichteten und unbeschichteten metallischen Proben - Teil 4: Beispiele fr Spektren von polymerbeschichteten und unbeschichteten Proben (ISO 16773-4:2017) Thi

18、s European Standard was approved by CEN on 20 February 2017. 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 refer

19、ences concerning such national standards may be obtained on 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

20、 member into its own language and notified to the CEN-CENELEC 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

21、, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION

22、EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16773-4:2017 EEuropean foreword .31 Scope . 52 Normative references 53 Terms a

23、nd definitions . 54 Theoretical background . 54.1 Basic considerations 54.2 Examples of models 64.2.1 Purely capacitive coating 64.2.2 Randles equivalent circuit . 74.2.3 Extended Randles equivalent circuit 7Annex A (informative) Examples 9Annex B (informative) Composition of concentrated artificial

24、 rain water 39Bibliography .40Contents PageDIN EN ISO 16773-4:2017-07 EN ISO 16773-4:2017 (E) 2Foreword 4European foreword This document (EN ISO 16773-4:2017) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and va

25、rnishes” 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 endorsement, at the latest by October 2017, and conflicting national standards shall be withdrawn at the latest by October 2017.

26、 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 16773-4:2009. According to the CEN-CENELEC Internal R

27、egulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland

28、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16773-4:2017 has been approved by CEN as EN ISO 16773-4:2017 without any modificati

29、on. DIN EN ISO 16773-4:2017-07 EN ISO 16773-4:2017 (E) 3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees

30、. 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 liaison with ISO, also take part in the work. ISO collaborates closely with the Intern

31、ational 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 Directives, Part 1. In particular the different approval criteria needed for the diffe

32、rent 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 some of the elements of this document may be the subject of patent rights. ISO sh

33、all 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 declarations received (see www .iso .org/ patents).Any trade name used in this docume

34、nt 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 assessment, as well as information about ISOs adherence to the World Trade Orga

35、nization (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, General test methods for paints and varnishes in collaboration with ISO/T

36、C 156, Corrosion of metals and alloys.This second edition cancels and replaces the first edition (ISO 16773-4:2009), which has been technically revised with the following changes.a) The introductory element of the title, Paints and varnishes, has been omitted, because the scope has been broadened to

37、 include metals and alloys. The main element of the title has been changed to Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens.b) A reference to ISO/TR 16208 and ASTM G106 for examples of spectra for low-impedance systems (range from, e.g. 10 to 1 000 ) has been

38、 added.c) Examples for uncoated specimens have been added.A list of all parts in the ISO 16773 series can be found on the ISO website.DIN EN ISO 16773-4:2017-07 EN ISO 16773-4:2017 (E) 4 1 ScopeThis document gives some typical examples of impedance spectra of polymer-coated and uncoated specimens (s

39、ee Annex A). Some guidance on interpretation of such spectra is also given. Further examples of spectra of low-impedance systems (range from, e.g. 10 to 1 000 ) are given in ISO/TR 16208 and in ASTM G106. ISO 16773-2 gives guidelines for optimizing the collection of EIS data with focus on high-imped

40、ance systems.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 referenced documen

41、t (including any amendments) applies.ISO 16773-1, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 1: Terms and definitions3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16773-1 apply.ISO and IEC maintain te

42、rminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp/ 4 Theoretical background4.1 Basic considerationsA basic introduction to electroche

43、mical impedance spectroscopy, especially in connection with corrosion, is given in ASTM G106.It is not intended to limit the interpretation of EIS measurements to the models given below. Other interpretations may be valid. The choice of the proper model requires other experimental and theoretical co

44、nsiderations to be taken into account.DIN EN ISO 16773-4:2017-07 EN ISO 16773-4:2017 (E) 5 4.2 Examples of models4.2.1 Purely capacitive coatingA metal covered with an undamaged coating generally has a very high impedance. The equivalent circuit for such a situation is shown in Figure 1.Figure 1 Equ

45、ivalent circuit for a purely capacitive coatingThe model includes a resistor representing the resistance Rs, of the solution and, connected in series with it, a capacitor representing the capacitance Cc, of the coating.In practice, the resistance of a perfect coating can often not be seen in the giv

46、en frequency range. Any deviation from the graph given in the Bode plot in Figure 2 indicates either a modified model or the input limits of the impedance device (see ISO 16773-2:2016, Annex A).KeyX1 frequency, f, in Hz X2 frequency, f, in HzY1 impedance, Z, in Y2 phase angle, , in degreesFigure 2 B

47、ode plot for a perfect coatingDIN EN ISO 16773-4:2017-07 EN ISO 16773-4:2017 (E) 6 4.2.2 Randles equivalent circuitThe Randles equivalent circuit includes the resistance of the solution Rs, the capacitance of the coating Ccand the ohmic resistance of the coating Rc, as shown in Figure 3.Figure 3 Ran

48、dles equivalent circuitThe Bode plot for a Randles equivalent circuit is shown in Figure 4.KeyX logf (f in Hz)Y1 log|Z| (Z in )Y2 | (degrees)1 impedance, Z2 phase angle, Figure 4 Bode plot for a Randles equivalent circuit4.2.3 Extended Randles equivalent circuitQuite often, fitting experimental data to the model shown in Figure 3 results in systematic errors. In such cases, the literature sho