1、BRITISH STANDARD BS EN ISO 4623-1:2002 BS 3900-F13: 2002 Incorporating Corrigendum No. 1 Paints and varnishes Determination of resistance to filiform corrosion Part 1: Steel substrates The European Standard EN ISO 4623-1:2002 has the status of a British Standard ICS 87.040 NO COPYING WITHOUT BSI PER
2、MISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN ISO 4623-1:2002 This British Standard, having been prepared under the direction of the Sector Policy and Strategy Committee for Materials and Chemicals, was published under the authority of the Standards Policy and Strategy Committee on 15 February 2
3、002 BSI 2 April 2002 ISBN 0 580 39016 0 National foreword This British Standard is the official English language version of EN ISO 4623-1:2002. It is identical with ISO 4623-1:2000. It supersedes BS EN ISO 4623:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technic
4、al 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 may be found in the BSI Stan
5、dards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
6、for their 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 European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests inf
7、ormed; 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 to v, a blank page, pages 1 to 8, an inside back
8、cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 13826 Corrigendum No. 1 2 April 2002 Replaced EN ISO forewordEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO46231 Jan
9、uary2002 ICS87.040 Englishversion PaintsandvarnishesDeterminationofresistancetofiliform corrosionPart1:Steelsubstrates(ISO46231:2000) PeinturesetvernisDterminationdelarsistancela corrosionfiliformePartie1:Subjectilesenacier(ISO 46231:2000) BeschichtungsstoffeBestimmungderBestndigkeit gegenFiliformko
10、rrosionTeil1:StahlalsSubstrat(ISO 46231:2000) ThisEuropeanStandardwasapprovedbyCENon27December2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographica
11、lreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManag
12、ementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDI
13、ZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO46231:2002ECORRECTED20020313 Foreword ThetextoftheInternationalStandardfromTechnical
14、CommitteeISO/TC35“Paintsand varnishes“oftheInternationalOrganizationforStandardization(ISO)hasbeentakenoverasa EuropeanStandardbyTechnicalCommitteeCEN/TC139“Paintsandvarnishes“,the secretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anide
15、nticaltextorbyendorsement,atthelatestbyJuly2002,andconflictingnationalstandards shallbewithdrawnatthelatestbyJuly2002. ThisdocumentsupersedesENISO4623:1995. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:A
16、ustria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg, Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom. Endorsementnotice ThetextoftheInternationalStandardISO46231:2000hasbeenapprovedbyCENasa EuropeanStandardwithoutanymodif
17、ications. NOTENormativereferencestoInternationalStandardsarelistedinannexZA(normative). ENISO46231:2002 INTERNATIONAL STANDARD ISO 4623-1 First edition 2000-09-15 Reference number ISO 4623-1:2000(E) OSI 2000 Paints and varnishes Determination of resistance to filiform corrosion Part 1: Steel substra
18、tes Peintures et vernis Dtermination de la rsistance la corrosion filiforme Partie 1: Subjectiles en acier 5egaP ENISO46231:2002 ii ISO 4623-1:2000(E) iii Contents Page 1 Scope . 1 2 Normative references . 1 3 Term and definition . 2 4 Principle 2 5 Required supplementary information . 2 6 Sampling
19、. 2 7 Apparatus . 2 8 Reagents 2 9 Test panels . 3 10 Procedure . 3 11 Evaluation of the degree of filiform corrosion . 5 12 Precision . 5 13 Test report 5 Annexes A Required supplementary information 6 B Guidance notes on maintaining exposure conditions using saturated ammonium sulfate solution 7 1
20、egaP BSENISO46231:20028egaP ENISO46231:2002 ISO 4623-1:2000(E) iv Foreword ISO (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
21、com- mittees. 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 liai- son with ISO, also take part in the work. ISO collaborates closely w
22、ith 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 3. Draft International Standards adopted by the technical committees are circulated to th
23、e 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 the possibility that some of the elements of this part of ISO 4623 may be the subject of patent rights. ISO shall not be held responsible
24、 for identifying any or all such patent rights. International Standard ISO 4623-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Sub- committee SC 9, General test methods for paints and varnishes. This first edition of ISO 4623-1 cancels and replaces ISO 4623:1984, of which it
25、constitutes a minor technical revi- sion. 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 Annex A forms a normative part of this part of ISO 4623. Annex B i
26、s for information only. 2egaP BSENISO46231:20028egaP ENISO46231:2002 ISO 4623-1:2000(E) v Introduction A scribed mark cut through a coating of paints or varnishes on steel can give rise to filiform corrosion. This corrosion tends to develop when the relative humidity is high and when traces of salts
27、 are present either under the paint coating or at breaks in the coating. A certain amount of under-rusting of the substrate, starting from the scribed mark, will al- ways occur. Filiform corrosion, however, is considered to be present only if the typical pattern in the form of threads is obvious. 3e
28、gaP 2002:13264OSINESB8egaP ENISO46231:2002 blankINTERNATIONAL STANDARD ISO 4623-1:2000(E) 1 Paints and varnishes Determination of resistance to filiform corrosion Part 1: Steel substrates 1 Scope This part of ISO 4623 is one of a series of standards dealing with the sampling and testing of paints, v
29、arnishes and related products. It describes a test procedure for assessing the protective action of coatings of paints or varnishes on steel against filiform corrosion arising from a scribed mark cut through the coating. 2 Normative references The following normative documents contain provisions whi
30、ch, through reference in this text, constitute provisions of this part of ISO 4623. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 4623 are encouraged to investigate the possi- bility o
31、f applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 483, Plastics Small enclosures for condi
32、tioning and testing using aqueous solutions to maintain relative hu- midity at constant value. ISO 1513, Paints and varnishes Examination and preparation of samples for testing. ISO 1514, Paints and varnishes Standard panels for testing. ISO 2409, Paints and varnishes Cross-cut test. ISO 2808, Paint
33、s and varnishes Determination of film thickness. ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing. ISO 3696, Water for analytical laboratory use Specification and test methods. ISO 4628-10, Paints and varnishes Evaluation of degradation
34、of coatings Part 10: Designation of intensity, quantity and size of common types of defect. ISO 7253, Paints and varnishes Determination of resistance to neutral salt spray (fog). ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling. BSENISO46231:20021 1egaP 2002:13264OSI
35、NEENISO46231:20021ISO -32642:1)E(000 2 3 Term and definition For the purposes of this part of ISO 4623, the following term and definition apply. 3.1 filiform corrosion a type of corrosion proceeding under a coat of paint, varnish or related product, in the form of threads, generally starting from ba
36、re edges or from local damage to the coating NOTE 1 Usually the threads are irregular in length and direction of growth, but they may also be nearly parallel and of approxi- mately equal length. NOTE 2 Filiform corrosion can also occur under other protective coatings. 4P r i n c i p l e A coated tes
37、t panel is scribed in a defined way. A small amount of sodium chloride is introduced into the scribed mark, either by dipping the panel in a solution of the salt or by exposure to salt-fog. The panel is then exposed in a test cabinet at and a relative humidity of . The effects of exposure are evalua
38、ted by criteria agreed in ad- vance between the interested parties, these criteria either being of a subjective nature or as given in ISO 4628-10. 5 Required supplementary information For any particular application, the test method specified in this part of ISO 4623 needs to be completed by suppleme
39、ntary information. The items of supplementary information are given in annex A. 6 Sampling Take a representative sample of 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 151
40、3. 7 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 7.1 Test cabinet, capable of being maintained at and a relative humidity of , and having provision for placing or hanging the test panels in an approximately vertical position so that the distance between the fa
41、ces of adjacent panels is at least . NOTE If a cabinet with automatic humidity control is not available, the specified humidity may be obtained by means of a satu- rated aqueous solution of ammonium sulfate. This gives a constant relative humidity of at (see ISO 483). Further de- tails and guidance
42、are given in annex B. 8R e a g e n t s 8.1 Sodium chloride solution (for the dipping technique). Unless otherwise specified, prepare the solution by dissolving of analytical grade sodium chloride in 1 litre of dis- tilled or demineralized water of at least grade 3 as defined in ISO 3696. Place the s
43、olution in a vessel suitable for complete immersion of the test panel (see 9.1 and 10.3.2). 40 C8 0 % (40 2) C (80 5) % 20 mm 79 % 40 C 1g BSENISO46231:20022 2egaP 2002:13264OSINEENISO46231:20022OSI -32640002:1)E( ISO 2000 All rights reserved 3 9 Test panels 9.1 Material and dimensions The test pane
44、ls shall be of burnished steel complying with the requirements of ISO 1514 and of minimum dimensions , unless otherwise specified. 9.2 Preparation and coating Prepare the test panels by burnishing as described in ISO 1514, unless otherwise specified, and then coat them by the specified method with t
45、he product or system under test. Unless otherwise specified, the back and edges of the panel shall be coated with the product or system under test. If the coating on the back and edges of the panel differs from that of the product under test, it shall have a corrosion resistance greater than that of
46、 the product under test. 9.3 Drying and conditioning Dry (or stove) and age (if applicable) each coated test panel for the specified time under the specified conditions, and, unless otherwise specified, condition them at the standard conditions defined in ISO 3270 for at least , with free circulatio
47、n of air and without exposing them to direct sunlight. The test procedure shall then be carried out as soon as possible. 9.4 Thickness of coating Determine the thickness, in micrometres, of the dried coating by one of the non-destructive procedures described in ISO 2808. 10 Procedure 10.1 Number of
48、determinations Carry out all tests in duplicate unless otherwise agreed. 10.2 Scribing the test panels Unless otherwise specified, make two scribed marks at least long on each test panel using a suitable tool (see note). Make the scribed marks perpendicular to each other and arranged in such a way that their distance from each other or from the edge of the panel
