1、December 2016 English price group 11No 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!%U“2595095www.din.deDIN
2、EN ISO 4623-2Paints and varnishes Determination of resistance to filiform corrosion Part 2: Aluminium substrates (ISO 46232:2016);English version EN ISO 46232:2016,English translation of DIN EN ISO 4623-2:2016-12Beschichtungsstoffe Bestimmung der Bestndigkeit gegen Filiformkorrosion Teil 2: Aluminiu
3、m als Substrat (ISO 46232:2016);Englische Fassung EN ISO 46232:2016,Englische bersetzung von DIN EN ISO 4623-2:2016-12Peintures et vernis Dtermination de la rsistance la corrosion filiforme Partie 2: Subjectiles en aluminium (ISO 46232:2016);Version anglaise EN ISO 46232:2016,Traduction anglaise de
4、DIN EN ISO 4623-2:2016-12SupersedesDIN EN ISO 46232:200406 andDIN EN ISO 46232 Corrigendum 1:200607www.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN ISO 4623-2:2016-12 2 A comma is u
5、sed as the decimal marker. National foreword This document (EN ISO 4623-2:2016) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secretariat: BSI, United Kingdom) in collaboration with Technical Committee CE
6、N/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr B
7、eschichtungsstoffe und Beschichtungen. DIN EN ISO 4623 consists of the following parts, under the general title Paints and varnishes Determination of resistance to filiform corrosion: Part 1: Steel substrates Part 2: Aluminium substrates The DIN Standards corresponding to the International Standards
8、 referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 1514 DIN EN ISO 1514 ISO 2808 DIN EN ISO 2808 ISO 3270 DIN EN 23270 ISO 4628-8 DIN EN ISO 4628-8 ISO 4628-10 DIN EN ISO 4628-10 ISO 9227 DIN EN ISO 9227 ISO 15528 DIN EN ISO 15528 Amendments This standard differs from DIN EN
9、ISO 4623-2:2004-06 and DIN EN ISO 4623-2 Corrigendum 1:2006-07 as follows: a) duplicate determination has been changed to triplicate determination; b) information on the shape of the scribe marks has been added; c) the width of the scribe marks has been changed to be in line with EN 3665; d) a NOTE
10、on using the CASS test for initiating filiform corrosion has been added; e) the supplementary test conditions previously in Annex A have been integrated in the test report. Previous editions DIN EN ISO 4623-2: 2004-06 DIN EN ISO 4623-2 Corrigendum 1: 2006-07 DIN EN ISO 4623-2:2016-12 3 National Anne
11、x NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for conditioning and testing DIN EN ISO 1513, Paints and varnishes Examination and preparation of test samples DIN EN ISO 1514, Paints and varnishes Standard panels for testing DIN EN
12、ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 4628-8, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 8: Assessment of degree of delamination and corrosion aroun
13、d a scribe or other artificial defect 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 changes in appearance Part 10: Assessment of degree of filiform corrosion DIN EN ISO 9227, Corrosion tests in
14、artificial atmospheres Salt spray tests DIN EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling DIN EN ISO 4623-2:2016-12 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4623-2 August 2016 ICS 87.040 Supersedes EN ISO 4623-2
15、:2004English Version Paints and varnishes - Determination of resistance to filiform corrosion - Part 2: Aluminium substrates (ISO 4623-2:2016) Peintures et vernis - Dtermination de la rsistance la corrosion filiforme - Partie 2: Subjectiles en aluminium (ISO 4623-2:2016) Beschichtungsstoffe - Bestim
16、mung der Bestndigkeit gegen Filiformkorrosion - Teil 2: Aluminium als Substrat (ISO 4623-2:2016) This European Standard was approved by CEN on 23 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
17、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 exists in three official versions (English, French
18、, 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 standards bodies of Austria, Belgium, Bulgaria, C
19、roatia, 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 an
20、d United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. N
21、o. EN ISO 4623-2:2016 EEN ISO 4623-2:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 6 4 Principle . 7 5 Sampling . 7 6 Apparatus . 7 7 Reagents . 7 8 Test panels . 7 8.1 Material and dimensions 7 8.2 Preparation a
22、nd coating . 8 8.3 Drying and conditioning . 8 8.4 Thickness of coating . 8 9 Procedure. 8 9.1 Determination 8 9.2 Scribing the test panels . 8 9.3 Testing 10 9.4 Inspection of test panels 10 10 Evaluation of the degree of filiform corrosion 10 11 Precision 10 12 Test report 10 Bibliography . 12 DIN
23、 EN ISO 4623-2:2016-12 European foreword This document (EN ISO 4623-2:2016) 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 g
24、iven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is drawn to the possibility that some of the elements of this document
25、 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 4623-2:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bo
26、und 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug
27、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4623-2:2016 has been approved by CEN as EN ISO 4623-2:2016 without any modification. DIN EN ISO 4623-2:2016-12 EN ISO 4623-2:2016 (E) 3 ForewordISO (the International Organi
28、zation 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. Each member body interested in a subject for which a technical committee has been establishe
29、d 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.T
30、he 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 different types of ISO documents should be noted. This document was drafted in accordance with the
31、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 shall not be held responsible for identifying any or all such patent rights. Details of any patent
32、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 document is information given for the convenience of users and does not constitute an endorsement.For an e
33、xplanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee r
34、esponsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.This second edition cancels and replaces the first edition (ISO 4623-2:2003), which has been technically revised. It also incorporates the Technical Corrigendum ISO 4623-
35、2:2003/Cor 1:2005. The following main changes have been made:a) duplicate determination has been changed to triplicate determination;b) information on the shape of the scribe marks has been added;c) the width of the scribe marks has been changed to be in line with EN 3665;d) a note on using the CASS
36、 test for initiating filiform corrosion was added;e) the supplementary test conditions previously in Annex A have been integrated in the test report.ISO 4623 consists of the following parts, under the general title Paints and varnishes Determination of resistance to filiform corrosion: Part 1: Steel
37、 substrates Part 2: Aluminium substratesDIN EN ISO 4623-2:2016-12 EN ISO 4623-2:2016 (E) 4IntroductionA scribe mark cut through a coating of paints or varnishes on metal can give rise to various types of corrosion, such as blistering of the coating, corrosion of the metal under the coating as well a
38、s filiform corrosion. Filiform corrosion tends to develop under specific conditions of temperature and relative humidity and when traces of acids, bases or salts are present either under the paint coating or at breaks in the coating. These conditions are often found in marine and/or industrial envir
39、onments. A certain amount of under-corrosion of the coating, starting from the scribe mark, will always occur. Filiform corrosion, however, is considered to be present only if the typical pattern in the form of threads is obvious.DIN EN ISO 4623-2:2016-12 EN ISO 4623-2:2016 (E) 5 1 ScopeThis part of
40、 ISO 4623 describes a test procedure for assessing the protective action of coatings of paints or varnishes on aluminium against filiform corrosion arising from a scribe mark cut through the coating.It is only suitable for assessing the performance of the coating/substrate combination tested. It is
41、not suitable for predicting the performance of the coating on different substrates.2 Normative referencesThe following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applie
42、s. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thickne
43、ssISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testingISO 4628-8, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 8: Assessment of
44、 degree of delamination and corrosion around a scribe or other artificial defectISO 4628-10, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 10: Assessment of degree of filiform corrosionIS
45、O 15528, Paints, varnishes and raw materials for paints and varnishes Sampling3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1filiform corrosiontype of corrosion proceeding under a coat of paint, varnish or related product, in the form of thread
46、s, generally starting from bare edges or from local damage to the coatingNote 1 to entry: Usually the threads are irregular in length and direction of growth, but they may also be nearly parallel and of approximately equal length. They usually follow the extrusion direction and do not cross over one
47、 another. They need to be initiated by aggressive ions.DIN EN ISO 4623-2:2016-12 EN ISO 4623-2:2016 (E) 64 PrincipleA coated test panel is scribed as defined in 9.2. A small amount of hydrochloric acid is introduced into the scribe mark through exposure to hydrochloric acid vapour. The panel is then
48、 exposed in a test cabinet at 40 C and a relative humidity of 82 %. The effects of exposure are then evaluated by criteria agreed in advance between the interested parties; these criteria usually being either of a subjective nature or as given in ISO 4628-10.5 SamplingTake a representative sample of
49、 the product to be tested (or of each product in the case of a multi-coat system), as specified in ISO 15528.Examine and prepare each sample for testing, as specified in ISO 1513.6 ApparatusOrdinary laboratory apparatus and glassware, together with the following:6.1 Test cabinet, capable of being maintained at (40 2) C and a relative humidity of (82 5) %. The cabinet shall have provision for maintai
