EN ISO 16276-2-2007 en Corrosion protection of steel structures by protective paint systems - Assessment of and acceptance criteria for the adhesion cohesion (fracture strength) of.pdf

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1、BRITISH STANDARDBS EN ISO 16276-2:2007Corrosion protection of steel structures by protective paint systems Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating Part 2: Cross-cut testing and X-cut testingThe European Standard EN ISO 16276-2:2007 has the s

2、tatus of a British StandardICS 87.020g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 16276-2:2007This British Standard was published under

3、 the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007ISBN 978 0 580 55742 2National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 16276-2:2007. The UK participation in its preparation was entrusted to Technical Committee ST

4、I/27, Paint systems for metallic substrates.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a B

5、ritish Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 16276-2May 2007ICS 87.020English VersionCorrosion protection of steel structures by protective paintsystems - Assessment of, an

6、d acceptance criteria for, theadhesion/cohesion (fracture strength) of a coating - Part 2:Cross-cut testing and X-cut testing (ISO 16276-2:2007)Anticorrosion des structures en acier par systmes depeinture - valuation et critres dacceptation deladhsion/cohsion (rsistance la rupture) dunrevtement - Pa

7、rtie 2: Essai de quadrillage et essai lacroix de Saint Andr (ISO 16276-2:2007)Korrosionsschutz von Stahlbauten durchBeschichtungssysteme - Beurteilung derAdhsion/Kohsion (Haftfestigkeit) einer Beschichtung undKriterien fr deren Annahme - Teil 2: Gitterschnitt- undKreuzschnittprfung (ISO 16276-2:2007

8、)This European Standard was approved by CEN on 14 May 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical referenc

9、es concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into i

10、ts own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lith

11、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN

12、 All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 16276-2:2007: EForeword This document (EN ISO 16276-2:2007) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes“, the secretariat of which is held by DIN, in coll

13、aboration with Technical Committee ISO/TC 35 “Paints and varnishes“. 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 November 2007, and conflicting national standards shall be withdrawn at the lat

14、est by November 2007. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ice

15、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 16276-2:2007Reference numberISO 16276-2:2007(E)INTERNATIONAL STANDARD ISO16276-2First edition2007-05-15Corrosion prote

16、ction of steel structures by protective paint systems Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating Part 2: Cross-cut testing and X-cut testing Anticorrosion des structures en acier par systmes de peintures valuation et critres dacceptation de lad

17、hsion/cohsion (rsistance la rupture) dun revtement Partie 2: Essai de quadrillage et essai la croix de Saint Andr EN ISO 16276-2:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Principle. 2 4.1 General. 2 4.2 Principle of cross-c

18、ut method . 3 4.3 Principle of X-cut method 3 5 Apparatus and materials 3 5.1 Cross-cut test 3 5.2 X-cut test 3 6 Procedure 4 6.1 General. 4 6.2 Field tests on coated structures . 4 6.3 Test panels for use on site 5 6.4 Cross-cut test 5 6.5 X-cut test 5 6.6 Testing . 5 6.7 Interpretation of results

19、6 7 Expression of results . 6 8 Acceptance criteria. 6 9 Test report . 7 Annex A (normative) Classification of results of X-cut test 8 Bibliography . 9 EN ISO 16276-2:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO

20、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. International organizations, govern

21、mental 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Di

22、rectives, Part 2. The main task of technical 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 b

23、odies casting a vote. 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. ISO 16276-2 was prepared by the European Committee for Standardization (CEN) Te

24、chnical Committee CEN/TC 139, Paints and varnishes, in collaboration with Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 14, Protective paint systems for steel structures. ISO 16276 consists of the following parts, under the general title Corrosion protection of steel structure

25、s by protective paint systems Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating: Part 1: Pull-off testing Part 2: Cross-cut testing and X-cut testing EN ISO 16276-2:2007vIntroduction The main purpose of this part of ISO 16276 is to supplement the ISO

26、12944 series with regard to the field assessment of, and acceptance criteria for, the adhesion/cohesion of a coating. NOTE This part of ISO 16276 is intended for assessment of cross-cut testing and X-cut testing of paint coatings on steel structures on site. ISO 2409 specifies a cross-cut test and A

27、STM D 3359 an X-cut test for general purposes, without instructions for interpretation of the results and without acceptance or rejection criteria. Fracture strength testing is normally destructive and therefore requires repair work, the extent of which will depend on the specification and on the du

28、rability required of the protective paint coating. An objective of this part of ISO 16276 is to minimize variability and achieve uniformity of practice in the assessment of the fracture strength of a protective paint coating and to establish acceptance/rejection criteria for such coatings. The metho

29、d uses test equipment based on the cross-cut and X-cut principles. EN ISO 16276-2:2007blank1Corrosion protection of steel structures by protective paint systems Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating Part 2: Cross-cut testing and X-cut test

30、ing 1 Scope This part of ISO 16276 specifies procedures for rating the resistance of coating systems when a cut in the form of a right-angle lattice pattern (cross-cut) or in the form of an X (X-cut) is made into the coating, penetrating through to the substrate. This part of ISO 16276 is only appli

31、cable if the cross-cut or X-cut test method is specified, together with the rating from the appropriate rating scale. NOTE The characteristics of the coating can make the assessment of the result of a cross-cut or X-cut test difficult. This part of ISO 16276 also specifies suitable equipment and def

32、ines inspection areas, sampling plans and acceptance/rejection criteria. It does not specify ratings for particular coating systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.

33、 For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2409:2006, Paints and varnishes Cross-cut test ISO 12944-7, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 7: Execution and supervision of pa

34、int work ISO 12944-8, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 8: Development of specifications for new work and maintenance ISO 19840, Paints and varnishes Corrosion protection of steel structures by protective paint systems Measurement of, and

35、acceptance criteria for, the thickness of dry films on rough surfaces ASTM D 3359-02, Standard Test Methods for Measuring Adhesion by Tape Test EN ISO 16276-2:20072 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fracture strength force requi

36、red to exceed the attachment forces between coats or between coat and substrate (adhesion) and/or within a coat (cohesion) NOTE This part of ISO 16276 does not define a method for determining fracture strength (see ISO 16276-1). 3.2 adhesion phenomenon of attachment at the interface between a solid

37、surface and another material caused by molecular forces NOTE Adhesion should not be confused with cohesion. ISO 4618:2006 3.3 cohesion forces that bind a film into an integral entity NOTE Cohesion should not be confused with adhesion. ISO 4618:2006 3.4 coat continuous layer of a coating material res

38、ulting from a single application ISO 4618:2006 3.5 coating continuous layer formed from a single or multiple application of a coating material to a substrate ISO 4618:2006 3.6 inspection area designated area to which a sampling plan has been applied, which can be the whole structure or a selected se

39、ction of the structure 4 Principle 4.1 General The resistance of coating systems to adhesive and cohesive failures due to cutting is assessed using either the cross-cut test or the X-cut test, whereby it is assessed qualitatively using a scale from 0 to 5, minimum to maximum damage, for each method

40、(see ISO 2409 and Annex A). The cross-cut test is suitable for film thicknesses up to 250 m. The X-cut test is not limited by thickness. EN ISO 16276-2:20073For hard coatings, it might not be possible to use the cross-cut test, in which case the X-cut test should be used. For coatings containing pig

41、ments that have a flake format, the assessment of either the cross-cut or the X-cut might be misleading. The coating manufacturer should be consulted for recommendations. For the cross-cut test, a matrix of cuts through the film is prepared and then inspected to assess the damage caused. The cross-c

42、ut test is performed as described in ISO 2409. The cuts can be made either individually using a cutting tool and a guide or template to achieve the correct spacing or by using a multiple-blade cutter with the correct number and spacing of blades. For the X-cut test, two cuts are made at an angle to

43、form an X. Adhesive tape is applied with a firm force (e.g. pressure from the thumb) over the cut and then removed at a prescribed angle. The X-cut test is performed as described in ASTM D 3359-02, method A, using Annex A of this document for the rating. NOTE 1 The order of the ratings in Annex A is

44、 the reverse of that published in ASTM D 3359-02. NOTE 2 The X-cut is also known as the St. Andrews cross. 4.2 Principle of cross-cut method The cross-cut method requires that a matrix of cuts be made through the coating to the substrate to produce even squares. The spacing of the cuts and hence the

45、 size of the squares is determined according to the thickness of the coating to be assessed. Adhesive tape is applied with a firm force to remove coating squares that are poorly attached after the cuts have been made. The result of the test is expressed as a rating according to the damage observed.

46、For complete details, see ISO 2409. 4.3 Principle of X-cut method The X-cut method requires that an X-cut be made through the coating using a sharp blade. Adhesive tape is applied with a firm force to remove coating that is poorly attached. The result of the test is expressed as a rating according t

47、o the damage observed. For the rating scale, see Annex A. 5 Apparatus and materials 5.1 Cross-cut test Details of the required apparatus and materials are given in ISO 2409. 5.2 X-cut test 5.2.1 Template, to produce a straight edge. 5.2.2 Single-blade cutter, in accordance with ISO 2409. 5.2.3 Trans

48、parent pressure-sensitive adhesive tape, in accordance with ISO 2409. EN ISO 16276-2:20074 6 Procedure 6.1 General As cross-cut and X-cut tests are destructive test methods, repair work will be necessary when they are used on coated structures. NOTE 1 To avoid damage to the coated structure, test pa

49、nels can be used (see 6.3). The results of cross-cut and X-cut tests are influenced by different aspects of the test conditions. The conditions on site shall be in accordance with the paint system manufacturers recommendations. If the required atmospheric conditions are not fulfilled at the site over the specified time period, seek the advice of the paint system manufacturer. NOTE 2 The age of the coating can affect the result of the test. Freshly applied coatings can have a diferent rating from those