1、BRITISH STANDARD BS EN ISO 15711:2004 Paints and varnishes Determination of resistance to cathodic disbonding of coatings exposed to sea water The European Standard EN ISO 15711:2004 has the status of a British Standard ICS 87.040 BS EN ISO 15711:2004 This British Standard was published under the au
2、thority of the Standards Policy and Strategy Committee on 24 January 2005 BSI 24 January 2005 ISBN 0 580 45312 X National foreword This British Standard is the official English language version of EN ISO 15711:2004. It is identical with ISO 15711:2003. The UK participation in its preparation was ent
3、rusted to Technical Committee STI/10, Test methods for paints, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to
4、 in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions o
5、f a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or pro
6、posals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii t
7、o v, a blank page, pages 1 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO15711 December2004 I
8、CS87.040 Englishversion PaintsandvarnishesDeterminationofresistancetocathodic disbondingofcoatingsexposedtoseawater(ISO15711:2003) PeinturesetvernisDterminationdelarsistanceau dcollementcathodiquedesrevtementsexpossleau demer(ISO15711:2003) BeschichtungsstoffeBestimmungdesWiderstandes gegenkathodisc
9、heEnthaftungvonBeschichtungenin Meerwasser(ISO15711:2003) ThisEuropeanStandardwasapprovedbyCENon21December2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbi
10、bliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnoti
11、fiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovaki
12、a, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO1
13、5711:2004:E Foreword The text of ISO 15711:2003 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 15711:2004 by Technical Committee CEN/TC 139 “Paints and varnishes“, the secretariat
14、 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC
15、Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N
16、etherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 15711:2003 has been approved by CEN as EN ISO 15711:2004 without any modifications. ENISO15711:2004 Reference number ISO 15711:2003(E)INTERNATIONAL ADNATSDR ISO
17、 11175 tide tsriFino -300251-50 Paints and varnishes Determination of resistance to cathodic disbonding of coatings exposed to sea water Peintures et vernis Dtermination de la rsistance au dcollement cathodique des revtements exposs leau de mer Referecne unbmer OSI 11751002:)E(3INTERNATIONAL STANDAR
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21、o marapterew stpo ereimizde fro irptni.gn Evyre cera neeb sah takne tsne oeru taht teh file is siutlbae fosu re yb ISO memdob rebeis. In tlnu ehikletneve y ttah lborp aem lertait gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ii ENISO15711:2004 iiiContents Page Fo
22、reword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Terms and definitions. 2 4 Principle. 2 5 Required supplementary information. 2 6 Test solutions 2 7 Apparatus. 3 8 Sampling 5 9 Test panels 5 10 Procedure. 9 11 Expression of results 11 12 Precision 12 13 Test report 12 Annex A (normati
23、ve) Required supplementary information 13 Annex B (normative) Sacrificial anodes Composition of zinc alloy . 14 ENISO15711:2004iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Intern
24、ational Standards is normally carried out through ISO technical committees. 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
25、 ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical
26、 committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to
27、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. ISO 15711 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for
28、paints and varnishes. ENISO15711:2004 vIntroduction This International Standard describes two methods for determining the ability of paint or other organic coatings applied to metallic substrates to withstand cathodic disbonding. These methods may also afford a basis for the comparison of particular
29、 coatings. The conditions of test are more severe than those likely to be encountered normally and so coating failure may be accelerated. It is recommended that the test be carried out for a period of at least 26 weeks and hence these methods are not suitable as a means of achieving quality control.
30、 The methods are suitable for coatings used for the protection of ships and structures exposed to sea water. Method A is based on the procedure developed and evaluated by COIPM (Comit International Permanent pour la Protection des Matriaux en Milieu Marin). The test result may be influenced not only
31、 by the properties of the coating system under test, but also by the nature and preparation of the substrate, the method of application of the coating system and other factors. ENISO15711:2004blankINTENRATIONAL TSANDADR IS:11751 O3002(E)1Paints and varnishes Determination of resistance to cathodic d
32、isbonding of coatings exposed to sea water 1 Scope This International Standard describes two methods for determining the ability of paint, or other organic coatings, applied to metallic substrates to withstand cathodic disbonding when the surface coating may contain or develop discontinuities. The m
33、ethods are applicable to coatings that are exposed to sea water, such as those applied to ships or marine structures. They are not suitable for the assessment of the ability of coatings to withstand cathodic disbonding on land-based structures. Method A involves the use of a cathodic protection circ
34、uit, whereby the electrode potential of the test substrates is controlled potentiostatically. Method B involves the use of sacrificial anodes attached to the test substrates. This reflects the practical method of cathodic protection commonly used on ships. 2 Normative references The following refere
35、nced 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 document (including any amendments) applies. ISO 554, Standard atmospheres for conditioning and/or testing Specifi
36、cations ISO 1513, Paints and varnishes Examination and preparation of samples for testing ISO 1514, Paints and varnishes Standard panels for testing ISO 2808, Paints and varnishes Determination of film thickness ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for c
37、onditioning and testing ISO 3696, Water for analytical laboratory use Specification and test method ISO 4624, Paints and varnishes Pull-off test for adhesion ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of unifor
38、m changes in appearance Part 2: Assessment of degree of blistering 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 grades of uncoated steel substrates and of steel substrates af
39、ter overall removal of previous coatings ISO 12944-6, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 6: Laboratory performance test methods ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling ENISO15711:20042 3 Terms and de
40、finitions For the purposes of this document, the following terms and definitions apply. 3.1 cathodic disbonding failure of adhesion between a coating and a metallic surface that is directly attributable to cathodic protection conditions and that is often initiated by a defect in the coating system,
41、such as accidental damage, imperfect application or excessive permeability of the coating 4 Principle 4.1 Method A (impressed current) A coated test panel is damaged in a defined way. The panel is then exposed in a test tank and connected to a cathodic protection circuit. The effects of exposure are
42、 evaluated against criteria which correspond to ISO 12944-6 (e.g. ISO 4628-2 or ISO 4624). 4.2 Method B (sacrificial anode) A sacrificial metal anode is attached electrically to a metal substrate which has been coated with the test coating/system. The inherent electrochemical nature of the two metal
43、s coupled in this manner establishes the test potential. The coating under test is applied to four panels in total. Two of these panels are protected by the sacrificial metal anodes and the other two, unprotected, panels act as controls. Artificial defects are introduced on all four test panels whic
44、h are then immersed for six months in sea water. After the immersion period, the test panels are removed from the sea water and immediately examined for blister formation and creep from the defect. An assessment of the coatings performance under cathodic protection conditions is made by comparing th
45、e results from the protected and unprotected panels. 5 Required supplementary information For any particular application, the test method specified in this International Standard needs to be completed by supplementary information. The items of supplementary information are given in Annex A. 6 Test s
46、olutions 6.1 Artificial sea water, conforming to the requirements given in Table 1, shall be used unless otherwise agreed (see 6.2). Table 1 Artificial sea water composition Compound Concentration g/l Sodium chloride 23,0 Magnesium chloride hexahydrate 9,8 Sodium sulfate decahydrate 8,9 Calcium chlo
47、ride 1,2 ENISO15711:2004 3The formulation shall contain no other additives, e.g. EDTA. Use water conforming as a minimum to the requirements of grade 2 of ISO 3696, and chemical reagents of analytical grade, for all solutions. 6.2 Natural sea water may be used if specified. If necessary, suspended s
48、olids may be removed by filtering through a suitable filter paper. 7 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 7.1 Method A (impressed current) 7.1.1 Test tank, of glass or other inert material that will not affect the pH of the electrolyte (6.1 or 6.2). The tank, either round of diameter not less than 700 mm or rectangular of minimum side 700 mm, shall have a depth of not less then 200 mm. A system for aerating the electrolyte shall be provided.
