《ISO-16276-2-2007.pdf》由会员分享，可在线阅读，更多相关《ISO-16276-2-2007.pdf（16页珍藏版）》请在三一文库上搜索。
1、 Reference number ISO 16276-2:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 16276-2 First edition 2007-05-15 Corrosion 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
2、 and X-cut testing Anticorrosion des structures en acier par systmes de peintures valuation et critres dacceptation de ladhsion/cohsion (rsistance la rupture) dun revtement Partie 2: Essai de quadrillage et essai la croix de Saint Andr Copyright International Organization for Standardization Provide
3、d by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with A
4、dobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing poli
5、cy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every c
6、are has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified,
7、no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case pos
8、tale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, U
9、ser=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Principl
10、e. 2 4.1 General. 2 4.2 Principle of cross-cut 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
11、 Testing . 5 6.7 Interpretation of results 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 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=I
12、HS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation
13、 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 established has the right to be represented on that committee.
14、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. International Standards are drafted in accordance wit
15、h the rules given in the ISO/IEC Directives, 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 approv
16、al by at least 75 % of the member bodies 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 Com
17、mittee for Standardization (CEN) Technical 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 Corr
18、osion protection of steel structures 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 Copyright International Organization for Standardization Provided
19、by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) ISO 2007 All rights reserved v Introduction The main purpose of this part of ISO 16
20、276 is to supplement the ISO 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 spe
21、cifies a cross-cut test and ASTM 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 th
22、e specification and on the durability 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
23、 for such coatings. The method uses test equipment based on the cross-cut and X-cut principles. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduct
24、ion or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without l
25、icense from IHS -,-,- INTERNATIONAL STANDARD ISO 16276-2:2007(E) ISO 2007 All rights reserved 1 Corrosion 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
26、testing 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 a
27、pplicable 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
28、 defines 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 appl
29、ies. 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 o
30、f paint 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,
31、and acceptance criteria for, the thickness of dry films on rough surfaces ASTM D 3359-02, Standard Test Methods for Measuring Adhesion by Tape Test Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus
32、 Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) 2 ISO 2007 All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fracture strength force required
33、 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 sur
34、face 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 result
35、ing 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 secti
36、on 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 (se
37、e 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. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resal
38、e, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 16276-2:2007(E) ISO 2007 All rights reserved 3 For 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 pigments tha
39、t 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-cut test i
40、s 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 form an X
41、. 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 the reve
42、rse 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 size of
43、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. For compl
44、ete 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 to the dam
45、age 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 Transparent pr
46、essure-sensitive adhesive tape, in accordance with ISO 2409. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 02:42:15 MDTNo reproduction or networking permitted without
47、 license from IHS -,-,- ISO 16276-2:2007(E) 4 ISO 2007 All rights reserved 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 panels can be used
48、 (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 a