BS EN ISO 4628-1-2016 Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects and of intensity of uniform changes in appearance Gener.pdf

1、BSI Standards PublicationBS EN ISO 4628-1:2016Paints and varnishes Evaluation of degradation ofcoatings Designation ofquantity and size of defects,and of intensity of uniformchanges in appearancePart 1: General introduction anddesignation systemBS EN ISO 4628-1:2016 BRITISH STANDARDNational foreword

2、This British Standard is the UK implementation of EN ISO4628-1:2016. It supersedes BS EN ISO 4628-1:2003 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/10, Test methods for paints.A list of organizations represented on this committee can beobtained

3、on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 84300 6ICS 87.040Compliance with a Britis

4、h Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 29 February 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NOR

5、M EN ISO 4628-1 February 2016 ICS 87.040 Supersedes EN ISO 4628-1:2003English Version Paints and varnishes - 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 (I

6、SO 4628-1:2016) Peintures et vernis - valuation de la dgradation des revtements - Dsignation de la quantit et de la dimension des dfauts, et de lintensit des changements uniformes daspect - Partie 1: Introduction gnrale et systme de dsignation (ISO 4628-1:2016) Beschichtungsstoffe - Beurteilung von

7、Beschichtungsschden - Bewertung der Menge und der Gre von Schden und der Intensitt von gleichmigen Vernderungen im Aussehen - Teil 1: Allgemeine Einfhrung und Bewertungssystem (ISO 4628-1:2016) This European Standard was approved by CEN on 19 December 2015. CEN members are bound to comply with the C

8、EN/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 application to the CEN-CENELEC Management C

9、entre 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 Management Centre has the same status as

10、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, Lithuania, Luxembourg, Malta, Neth

11、erlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited 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 rig

12、hts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4628-1:2016 EBS EN ISO 4628-1:2016EN ISO 4628-1:2016 (E) 3 European foreword This document (EN ISO 4628-1:2016) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in c

13、ollaboration 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 national standard, either by publication of an identical text or by endorsement, at the latest by August 2016, and conflicting nation

14、al standards shall be withdrawn at the latest by August 2016. Attention is drawn to the possibility that some of the elements of this document 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

15、 EN ISO 4628-1:2003. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of M

16、acedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4628-1:2016 has been approved b

17、y CEN as EN ISO 4628-1:2016 without any modification. BS EN ISO 4628-1:2016ISO 4628-1:2016(E)Foreword iv1 Scope . 12 Normative references 13 General principles of the system . 14 Assessment of defects and of intensity of changes . 24.1 General . 24.2 Designation of quantity of defects 24.3 Designati

18、on of size of defects . 24.4 Designation of intensity of changes 25 Expression of results 36 Test report . 3Bibliography 4 ISO 2016 All rights reserved iiiContents PageBS EN ISO 4628-1:2016ISO 4628-1:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of

19、 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 established has the right to be represented on that committee. Int

20、ernational 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.The procedures used to develop this document and those in

21、tended 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 editorial rules of the ISO/IEC Directives, Part 2 (see w

22、ww.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 rights identified during the development of the document

23、 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 explanation on the meaning of ISO specific terms and expr

24、essions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee

25、 SC 9, General test methods for paints and varnishes.This fourth edition cancels and replaces the third edition (ISO 4628-1:2003), which has been technically revised with the following changes:a) a lower limit for visual assessment of defects has been introduced in Table 2;b) a normative reference t

26、o ISO 13076 for illumination for the assessment has been added.ISO 4628 consists of the following parts, under the general title Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance: Part 1: General

27、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: Assessment of degree of chalking by tape method Part 7: Assessment of degree of chalking by

28、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 corrosioniv ISO 2016 All rights reservedBS EN ISO 4628-1:2016INTERNATIONAL STANDARD ISO 4628-1:2016(E)Paints and varnishes Evaluation of degra

29、dation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation system1 ScopeThis part of ISO 4628 defines a system for designating the quantity and size of defects and the intensity of changes in appearan

30、ce of coatings and outlines the general principles of the system used throughout ISO 4628. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes, for example yellowing.The other parts of ISO 4628 provide pictorial standards or other m

31、eans for evaluating particular types of defect. As far as possible, already existing evaluation schemes have been used as the basis.This part of ISO 4628 is also used for assessing defects not covered by the other parts of ISO 4628.2 Normative referencesThe following documents, in whole or in part,

32、are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 13076, Paints and varnishes Lighting and procedure

33、 for visual assessments of coatings3 General principles of the systemA uniform convention has been adopted for designating the quantity and size of defects and the intensity of changes by means of ratings on a numerical scale ranging from 0 to 5, 0 denoting no defects or changes, and 5 denoting defe

34、cts or changes so severe that further discrimination is not reasonable. The other ratings, corresponding to the numbers 1, 2, 3, and 4, are so defined that they give optimum discrimination over the whole range of the scale.The use of intermediate half-steps is permissible, if specified, to give a mo

35、re detailed report on the defects or changes observed.NOTE 1 The quantity of small defects scattered over the test area may be assessed by means of a grid method. Details of such a method are described in ISO 10289.NOTE 2 The ISO ranking may be different from the ranking schemes used in other standa

36、rds, e.g. the rusting evaluation ASTM D 610, where ranking is from 10 to 1, with 10 meaning no change and 1 meaning greatest change.In addition to the ratings, the approximate dimensions of the area concerned shall be given, or the proportion of the area concerned compared with the total area, expre

37、ssed as a percentage. ISO 2016 All rights reserved 1BS EN ISO 4628-1:2016ISO 4628-1:2016(E)4 Assessment of defects and of intensity of changes4.1 GeneralCarry out the assessment under good illumination, as specified in ISO 13076.Carry out a first assessment of defect visually, without any magnificat

38、ion.4.2 Designation of quantity of defectsThe quantity of defects in the form of discontinuities or other local imperfections in the coating, scattered over the test area in a more or less even pattern, is designated in accordance with Table 1. The ratings shall be expressed as a whole number unless

39、 otherwise specified (see Clause 3).Table 1 Rating scheme for designating the quantity of defectsRating Quantity of defect0 none, i.e. no detectable defects1 very few, i.e. small, barely significant number of defects2 few, i.e. small but significant number of defects3 moderate number of defects4 con

40、siderable number of defects5 dense pattern of defects4.3 Designation of size of defectsThe average size (order of magnitude) of defects is designated, if required and meaningful, in accordance with Table 2.Table 2 Rating scheme for designating the size of defectsRating Size of defecta0 not visible u

41、nder 10 magnification1 only visible under magnification up to 102 just visible with normal corrected vision (up to 0,2 mm)b3 clearly visible with normal corrected vision (larger than 0,2 mm up to 0,5 mm)4 larger than 0,5 mm up to 5 mm5 larger than 5 mmaUnless otherwise specified in subsequent parts

42、of ISO 4628.bTypically, defects larger than 0,2 mm are visible with normal corrected vision.Where a test area exhibits defects of various sizes, the size of the largest defects which are numerous enough to be typical of the test area shall be quoted as the size rating. The size of the defect shall b

43、e reported using the designation Sn, where S indicates the size and n is the rating number. For example, a defect which is just visible with normal corrected vision is designated S2.4.4 Designation of intensity of changesThe intensity of uniform changes in the appearance of the coating, such as colo

44、ur changes, for example yellowing, is designated in accordance with Table 3. The ratings shall be expressed as a whole number unless otherwise specified (see Clause 3).2 ISO 2016 All rights reservedBS EN ISO 4628-1:2016ISO 4628-1:2016(E)Table 3 Rating scheme for designating the intensity of changesR

45、ating Intensity of change0 unchanged, i.e. no perceptible change1 very slight, i.e. just perceptible change2 slight, i.e. clearly perceptible change3 moderate, i.e. very clearly perceptible change4 considerable, i.e. pronounced change5 very marked change5 Expression of resultsThe type of defect, the

46、 quantity present (see Table 1), and its size (see Table 2), shall be expressed as indicated in the following examples: blistering; degree of blistering 2(S2), i.e. quantity 2/size 2; flaking; degree of flaking 3(S2), i.e. quantity 3/size 2;together with the approximate dimensions of the area concer

47、ned, or its proportion of the total area, expressed as a percentage.If necessary, the test result may be amplified in words, for example “confined to edges” or “blistering of top coat down to intermediate coat”.The type of change and its intensity (see Table 3), shall be expressed as indicated in th

48、e following example: chalking 4;together with the approximate dimensions of the area concerned, or its proportion of the total area, expressed as a percentage.6 Test reportThe test report shall contain at least the following information:a) all details necessary to identify the coating examined;b) a

49、reference to this part of ISO 4628, i.e. ISO 4628-1;c) the type of surface examined, its size and, if appropriate, its location;d) the result of the assessment in accordance with Clause 5;e) an indication of the illumination under which the assessment was carried out;f) any unusual features (anomalies) observed during the assessment;g) the date of the examination. ISO 2016 All rights reserved 3BS EN ISO 4628-1:2016ISO 4628-1:2016(E)Bibliography1 ISO 10289, Methods for corrosion testing of metallic and other