DIN EN ISO 4628-8-2013 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects and of intensity of uniform changes in appearance .pdf

1、March 2013Translation by DIN-Sprachendienst.English price group 10No 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 8

2、7.040!$5“1951888www.din.deDDIN EN ISO 4628-8Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniformchanges in appearance Part 8: Assessment of degree of delaminationand corrosion around a scribe or other artificial defect(IS

3、O 4628-8:2012);English version EN ISO 4628-8:2012,English translation of DIN EN ISO 4628-8:2013-03Beschichtungsstoffe Beurteilung von Beschichtungsschden Beurteilung der Menge und der Gre von Schden und der Intensitt von gleichmigenVernderungen im Aussehen Teil 8: Bewertung der von einem Ritz oder e

4、iner anderenknstlichen Verletzung ausgehenden Enthaftung und Korrosion (ISO 4628-8:2012);Englische Fassung EN ISO 4628-8:2012,Englische bersetzung von DIN EN ISO 4628-8:2013-03Peintures et vernis valuation de la dgradation des revtements Dsignation de la quantit et de la dimension des dfauts, et de

5、lintensit deschangements uniformes daspect Partie 8: valuation du degr de dcollement et decorrosion autour dune rayure ou dun autre dfaut artificiel (ISO 4628-8:2012);Version anglaise EN ISO 4628-8:2012,Traduction anglaise de DIN EN ISO 4628-8:2013-03SupersedesDIN EN ISO 4628-8:2005-05www.beuth.deIn

6、 case of doubt, the German-language original shall be considered authoritative.Document comprises 16 pages02.13 DIN EN ISO 4628-8:2013-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 4628-8:2012) has been prepared by Technical Committee ISO/TC 35 “Paints and varni

7、shes”, 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 the Normenausschuss Beschic

8、htungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. ISO 4628-1 defines a system for designating the quantity and size of defects and the intensity of uniform changes

9、 in appearance of coatings and outlines the general principles of the system. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example yellowing. The other parts of ISO 4628 provide pictorial standards

10、 or other means for evaluating particular types of defect. As far as possible, already existing evaluation schemes have been used as the basis. DIN EN ISO 4628 consists of the following parts, under the general title Paints and varnishes Evaluation of degradation of coatings Designation of quantity

11、and size of defects, and of intensity of uniform changes in appearance: Part 1: General introduction and designation system Part 2: Assessment of degree of blistering Part 3: Assessment of degree of rusting Part 4: Assessment of degree of cracking Part 5: Assessment of degree of flaking Part 6: Asse

12、ssment of degree of chalking by tape method Part 7: Assessment of degree of chalking by velvet method Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect Part 10: Assessment of degree of filiform corrosion The DIN Standards corresponding to the Inter

13、national Standards referred to in this document are as follows: ISO 3270 DIN EN 23270 ISO 4628-1 DIN EN ISO 4628-1 ISO 4628-2 DIN EN ISO 4628-2 ISO 4628-3 DIN EN ISO 4628-3 ISO 4628-4 DIN EN ISO 4628-4 ISO 4628-5 DIN EN ISO 4628-5 ISO 4628-10 DIN EN ISO 4628-10 ISO 9227 DIN EN ISO 9227 ISO 15711 DIN

14、 EN ISO 15711 DIN EN ISO 4628-8:2013-03 3 Amendments This standard differs from DIN EN ISO 4628-8:2005-05 as follows: a) the use of measurement and calculation to determine delamination and corrosion is preferred over the use of pictorial standards; b) artificial defects with shape other than a line

15、ar scribe mark are introduced. Previous editions DIN 53167: 1972-08, 1985-12 DIN EN ISO 4628-8: 2005-05 National Annex NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for conditioning and testing DIN EN ISO 4628-1, Paints and varnishe

16、s Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation system DIN EN ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of

17、 defects, and of intensity of uniform changes in appearance Part 2: Assessment of degree of blistering DIN EN ISO 4628-3, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 3: Assessment of de

18、gree of rusting DIN EN ISO 4628-4, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 4: Assessment of degree of cracking DIN EN ISO 4628-5, Paints and varnishes Evaluation of degradation of c

19、oatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 5: Assessment of degree of flaking DIN EN ISO 4628-10, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform chang

20、es in appearance Part 10: Assessment of degree of filiform corrosion DIN EN ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests DIN EN ISO 15711, Paints and varnishes Determination of resistance to cathodic disbonding of coatings exposed to sea water DIN EN ISO 4628-8:2013-03 4 This

21、 page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4628-8 November 2012 ICS 87.040 Supersedes EN ISO 4628-8:2005English Version Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform c

22、hanges in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (ISO 4628-8:2012) Peintures et vernis - valuation de la dgradation des revtements - Dsignation de la quantit et de la dimension des dfauts, et de lintensit des changements uni

23、formes daspect - Partie 8: valuation du degr de dcollement et de corrosion autour dune rayure ou dun autre dfaut artificiel (ISO 4628-8:2012) Beschichtungsstoffe - Beurteilung von Beschichtungsschden - Beurteilung der Menge und der Gre von Schden und der Intensitt von gleichmigen Vernderungen im Aus

24、sehen - Teil 8: Bewertung der von einem Ritz oder einer anderen knstlichen Verletzung ausgehenden Enthaftung und Korrosion (ISO 4628-8:2012)This European Standard was approved by CEN on 5 October 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond

25、itions 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 application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exist

26、s 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 Management Centre has the same status as the official versions. CEN members are the national stan

27、dards 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sl

28、ovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4628-8:2012: EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT

29、EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGContents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Terms and definitions 5 4 Principle 6 5 Procedure 6 6 Calculation and expression of results . 8 7 Test report . 10 Bibliography 12 2DIN EN ISO 4628-8:2013-03EN IS

30、O 4628-8:2012 (E) Foreword This document (EN ISO 4628-8:2012) 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

31、of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat

32、ent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 4628-8:2005. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this Euro

33、pean Standard: Austria, Belgium, Bulgaria, 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, Slo

34、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4628-8:2012 has been approved by CEN as a EN ISO 4628-8:2012 without any modification. “”3DIN EN ISO 4628-8:2013-03 EN ISO 4628-8:2012 (E) IntroductionISO 4628-11defines a system for designating the

35、quantity and size of defects and the intensity of uniform changes in appearance of coatings and outlines the general principles of the system. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example y

36、ellowing.The other parts of ISO 4628 provide pictorial standards or other means for evaluating particular types of defect. As far as possible, already existing evaluation schemes have been used as the basis.After exposure of a coated test panel with a scribe or other artificial defect in a corrosive

37、 environment, one, or a combination of both of, the following phenomena can occur around the scribe or other artificial defect: delamination; corrosion.Delamination and corrosion around the scribe or other artificial defect are evaluated separately to provide more detailed information about the perf

38、ormance of a coating system in corrosive environments.In addition to the procedure specified in this part of ISO 4628, assessments of delamination and corrosion around the scribe or other artificial defect may be carried out using optical image processing.Rating of other defects is described in othe

39、r parts of ISO 4628.4DIN EN ISO 4628-8:2013-03EN ISO 4628-8:2012 (E) 1 ScopeThis part of ISO 4628 specifies a method for assessing delamination and corrosion around a scribe or other artificial defect on a coated panel or other coated test specimen, caused by a corrosive environment.This part of ISO

40、 4628 does not cover evaluation of pitting corrosion or pit depth.NOTE 1 Examples of corrosive environments are artificial atmospheres such as salt spray, as used in the test method specified in ISO 9227,7and sea water immersion as used in the test method specified in ISO 15711.8Natural environments

41、 can also be used.NOTE 2 The extent of other defects can also be determined at the same time as delamination and corrosion. Methods are given as follows: blistering in accordance with ISO 4628-2;2 rusting in accordance with ISO 4628-3;3 cracking in accordance with ISO 4628-4;4 flaking in accordance

42、with ISO 4628-5;5 filiform corrosion in accordance with ISO 4628-10.62 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced doc

43、ument (including any amendments) applies.ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1holidayabsence of a paint film from certain a

44、reas of a coated substrate3.2artificial defectholiday through a coating, deliberately introduced in order to expose the underlying metal substrate prior to exposure to a corrosive environment5DIN EN ISO 4628-8:2013-03 EN ISO 4628-8:2012 (E) 3.3circular defectcircular holiday through a coating, delib

45、erately introduced in order to expose the underlying metal substrate prior to exposure in a corrosive environment3.4corroded areaarea around a defect where the substrate has been attacked by corrosion3.5delaminated areaarea around a defect where loss of adhesion of a coating from a substrate or an u

46、nderlying coating has occurred3.6scribelinear holiday through a coating, deliberately introduced in order to expose the underlying metal substrate prior to exposure in a corrosive environment4 PrincipleThe delamination around a scribe or other artificial defect is assessed either directly at the end

47、 of the test period, immediately after removal of the test panel from a previous conditioning environment, or after conditioning for a specified period.The corrosion around the scribe or other artificial defect is assessed either immediately after removal of the test panel from a previous conditioni

48、ng environment or after removal of the coating.Both the degree of delamination and the degree of corrosion are determined by measurement and calculation.5 Procedure5.1 GeneralThe assessment of delamination shall be made immediately after removal of the panels from the conditioning environment (5.2.1

49、) unless otherwise specified or agreed, in which case assessment may be made after a further conditioning period, during which adhesion might recover (5.2.2).The assessment of corrosion may be made on the coated panel (5.3.1) or, if agreed or otherwise specified, after stripping off the coating (5.3.2).If corrosion is to be assessed after s