DIN EN ISO 17463-2014 Paints and varnishes - Guidelines for the determination of anticorrosive properties of organic coatings by accelerated cyclic electrochemical technique (ISO 1.pdf

1、November 2014 Translation by DIN-Sprachendienst.English price group 12No 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).I

2、CS 87.040!%1l“2271473www.din.deDDIN EN ISO 17463Paints and varnishes Guidelines for the determination of anticorrosive properties of organiccoatings by accelerated cyclic electrochemical technique(ISO 17463:2014);English version EN ISO 17463:2014,English translation of DIN EN ISO 17463:2014-11Beschi

3、chtungsstoffe Richtlinie zur Bestimmung der antikorrosiven Eigenschaften organischer Beschichtungendurch beschleunigte zyklische elektrochemische Verfahren (ISO 17463:2014);Englische Fassung EN ISO 17463:2014,Englische bersetzung von DIN EN ISO 17463:2014-11Peintures et vernis Lignes directrices pou

4、r la dtermination des proprits anticorrosives de revtementsorganiques par une technique lectrochimique cyclique acclre (ISO 17463:2014);Version anglaise EN ISO 17463:2014,Traduction anglaise de DIN EN ISO 17463:2014-11www.beuth.deDocument comprises 22 pagesIn case of doubt, the German-language origi

5、nal shall be considered authoritative.11.14 DIN EN ISO 17463:2014-11 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17463:2014) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” (Secretariat: NEN, Netherlands) in collaboration with CEN/TC 139

6、 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Besch

7、ichtungsstoffe und Beschichtungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2808 DIN EN ISO 2808 ISO 3270 DIN EN 23270 ISO 15711:2003 DIN EN ISO 15711:2005-03 ISO 16773-1 DIN EN ISO 16773-1 ISO 16773-2 DIN EN ISO 16773-2 ISO 1677

8、3-3 DIN EN ISO 16773-3 ISO 16773-4 DIN EN ISO 16773-4 DIN EN ISO 17463:2014-11 3 National Annex NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for conditioning and testing DIN EN ISO 2808, Paints and varnishes Determination of film t

9、hickness DIN EN ISO 15711:2005-03, Paints and varnishes Determination of resistance to cathodic disbonding of coatings exposed to sea water 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, Ele

10、ctrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 2: Collection of data 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 EN ISO 16773-4, Elect

11、rochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 4: Examples of spectra of polymer coated specimens DIN EN ISO 17463:2014-11 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17463 August 2014 ICS 87.040 English Version

12、Paints and varnishes - Guidelines for the determination of anticorrosive properties of organic coatings by accelerated cyclic electrochemical technique (ISO 17463:2014) Peintures et vernis - Lignes directrices pour la dtermination des proprits anticorrosives de revtements organiques par une techniqu

13、e lectrochimique cyclique acclre (ISO 17463:2014) Beschichtungsstoffe - Richtlinie zur Bestimmung der antikorrosiven Eigenschaften organischer Beschichtungen durch beschleunigte zyklische elektrochemische Verfahren (ISO 17463:2014) This European Standard was approved by CEN on 11 July 2014. CEN memb

14、ers 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 references concerning such national standards may be obtained on applicati

15、on 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 member into its own language and notified to the CEN-CENELEC Managem

16、ent 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

17、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 1

18、7, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17463:2014 EContents PageForeword 3Introduction 41 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 64.1 General . 64.2 EIS measurem

19、ent 74.3 Cathodic polarization 74.4 Potential relaxation . 75 Apparatus . 76 Specimens 76.1 Samples preparation 76.2 Environmental control . 76.3 Number of specimens and repeatability of results 87 Procedure. 87.1 EIS measurement 87.2 Cathodic polarization 87.3 Relaxation process . 87.4 Number of cy

20、cles . 88 Data presentation 98.1 Graphics for EIS 98.2 Graphics for the potential relaxation . 99 Precision . 910 Test report . 9Annex A (informative) Typical example of results from coatings . 11Bibliography .18DIN EN ISO 17463:2014-11 EN ISO 17463:2014 (E) 2 DIN EN ISO 17463:2014-11 EN ISO 17463:2

21、014 (E) 3Foreword This document (EN ISO 17463:2014) has been prepared by Technical Committee ISO/TC 35 ”Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. This European Standard shall be given the status of a nat

22、ional standard, either by publication of an identical text or by endorsement, at the latest by February 2015, and conflicting national standards shall be withdrawn at the latest by February 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of p

23、atent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

24、Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey a

25、nd the United Kingdom. Endorsement notice The text of ISO 17463:2014 has been approved by CEN as EN ISO 17463:2014 without any modification. IntroductionThis International Standard describes the determination of the anticorrosive properties of organic coatings by means of the accelerated cyclic elec

26、trochemical technique (ACET). The method is based on the so called AC/DC/AC procedure. This technique allows comparing the protective and anticorrosive properties of different coating systems on metal in short times and in a qualitative and quantitative way. ACET consists of the application of cycle

27、s of EIS (electrochemical impedance spectroscopy) measurements, cathodic polarizations and potential relaxation. Degradation of the coating system is accelerated by the cathodic polarization. EIS and potential relaxation monitor the change of the coating system induced by the cathodic polarization.

28、The technique evaluates the permeability of the coating and properties which can be attributed to adhesion to the substrate.DIN EN ISO 17463:2014-11 EN ISO 17463:2014 (E) 4 1 ScopeThis International Standard gives guidelines on how to perform accelerated cyclic electrochemical technique (ACET) with

29、organic protective coatings on metals.This International Standard specifies: the instrumental assembly; the execution of an ACET test and the considerations relative to the samples and electrochemical cell, test parameters and procedure.This International Standard also provides guidelines for the pr

30、esentation of experimental results and other type of information obtained.Some typical examples are shown in an informative annex.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated refer

31、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2808, Paints and varnishes Determination of film thicknessISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditi

32、oning and testingISO 16773-1, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 1: Terms and definitionsISO 16773-2:1), Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens Part 2: Collection of data3 Terms and definitionsFo

33、r the purposes of this document, the terms and definitions given in ISO 16773-1 and the following apply.3.1cathodic polarizationapplication of a potential Upolmore negative than the open-circuit potential Uocpfor a fixed period of polarization time tpolNote 1 to entry: This value is defined by the o

34、perator.1) To be published. Revision of ISO 16773-2:2007.DIN EN ISO 17463:2014-11 EN ISO 17463:2014 (E) 5 3.2relaxation timetrelaxtime between the cathodic polarization and the beginning of the electrochemical impedance spectroscopy (EIS) measurementNote 1 to entry: This value is defined by the oper

35、ator.3.3cathodic disbondingfailure of adhesion between a coating and a metallic surface that is directly attributable to cathodic reaction conditions and that is often initiated by a defect in the coating system, such as accidental damage, imperfect application or excessive permeability of the coati

36、ngSOURCE: ISO 15711:2003, definition 3.13.4cathodic potentialPpotential difference between an applied potential Upoland the open circuit potential Uocp4 Principle4.1 GeneralThe initial state of the coating system is characterized by an electrochemical impedance spectroscopy (EIS) measurement (EISn-1

37、 see Figure 1). Then a cathodic polarization (Pn) is applied for a certain period of time (tpol) followed by the relaxation process (rn) over the time (trelax). Finally the new state of the coating system is characterized by a second EIS measurement (EISn). These steps define a cycle which can be re

38、peated n number of times (n is the number of cycles).NOTE Typically six cycles are used.KeyX time t, in minY potential U, in VFigure 1 ACET cycleDIN EN ISO 17463:2014-11 EN ISO 17463:2014 (E) 6 4.2 EIS measurementA special type of potentiostat intended for EIS is connected to an electrochemical cell

39、. A single-sinusoidal-waveform potential is applied and the resulting alternating current is measured. Both potential and current data are collected and analysed for amplitude and phase shift. More information about the procedure can be found in ISO 16773-2.4.3 Cathodic polarizationA constant cathod

40、ic potential, Upol, is applied. During the polarization, the electrolysis of water can take place if Upolis negative enough:H2O (l) + e H2(g) + OH(aq) The application of the cathodic potential will generate a stress on the protective coating.If the electrolysis takes place at the interface of the co

41、ating to the metallic substrate, the hydroxide ions (OH) and/or hydrogen (H2) can cause delamination between the metal and the coating.4.4 Potential relaxationThe purpose of the relaxation process is to allow the formation of a new stable equilibrium before the next EIS measurement is performed. By

42、recording the potential during the relaxation process, valuable additional information about the coating and the coating-metal interface can be obtained.5 ApparatusUse the electrochemical equipment specified in ISO 16773-2.6 Specimens6.1 Samples preparationProper preparation and preconditioning of c

43、oated specimens is critical for successful and reliable experimental data.6.2 Environmental controlThe coating should be applied and cured in accordance with the manufacturers recommendation unless otherwise agreed upon between the parties involved. The film thickness should be as uniform as possibl

44、e. The exact film thickness should be measured and reported (e.g. in accordance with ISO 2808). Temperature and humidity control during the application, curing, conditioning and measurement of organic coatings is crucial for a proper determination of the coating resistance.For reliable measurements,

45、 temperature control should be equal to or better than 1 C. For conditioning prior to measurement, an accuracy of 2 C is sufficient for most cases. Each specimen should be kept under controlled conditions in order to prevent post-curing, degradation or any unintended irreversible modification of the

46、 coating.The temperature of the specimens during measurements should be maintained constant to within 2 C, preferably within 1 C, at 23 C, if not otherwise specified. Relative values for comparison between specimens outside these guidelines are acceptable if all the specimens are run under the same

47、conditions. When the coating capacitance is the main parameter of interest, control of relative humidity during specimen conditioning is very important. To ensure accurate conditioning, the humidity should be (50 5) % in accordance with ISO 3270, if not otherwise agreed.DIN EN ISO 17463:2014-11 EN ISO 17463:2014 (E) 7 6.3 Number of specimens and repeatability of resultsCoatings are mate