DIN EN ISO 16276-1-2007 Corrosion protection of steel structures by protective paint systems - Assessment of and acceptance criteria for the adhesion cohesion (fracture strength) o.pdf

1、August 2007DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 87.040; 91.080.10!$Hu9“1

2、378222www.din.deDDIN EN ISO 16276-1Corrosion 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 (ISO 16276-1:2007)English version of DIN EN ISO 16276-1:2007-08Korrosions

3、schutz von Stahlbauten durch Beschichtungssysteme Beurteilung der Adhsion/Kohsion (Haftfestigkeit) einer Beschichtung und Kriterien frderen Annahme Teil 1: Abreiversuch (ISO 16276-1:2007)Englische Fassung DIN EN ISO 16276-1:2007-08www.beuth.deDocument comprises 15 pages 10.07DIN EN ISO 16276-1:2007-

4、08 2 National foreword This standard has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany) in collaboration with Technical Committee ISO/TC 35 “Paints and varnishes”. The responsible German body involved in its preparation was the Normenausschuss Besc

5、hichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Technical Committees NA 002-00-10-05 GUA Korrosionsschutzstoffe und -systeme, einschlielich Prfung and NA 002-00-10 GA Korrosionsschutz von Stahlbauten. DIN EN ISO 16276 consists of the following parts, under th

6、e general title Corrosion 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 The DIN Standards corresponding to the Interna

7、tional Standards referred to in the EN are as follows: ISO 4618:2006 DIN EN ISO 4618:2007-03 ISO 4624 DIN EN ISO 4624 ISO 12944 (all parts) DIN EN ISO 12944 (all parts) National Annex NA (informative) Bibliography DIN EN ISO 4618:2007-03, Paints and varnishes Terms and definitions (ISO 4618:2006) DI

8、N EN ISO 4624, Paints and varnishes Pull-off test for adhesion Abreiversuch DIN EN ISO 12944 (all parts), Paints and varnishes Corrosion protection of steel structures by protective paint systems EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16276-1 May 2007 ICS 87.020 English Version Cor

9、rosion 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 (ISO 16276-1:2007) Anticorrosion des structures en acier par systmes de peinture - valuation et critres da

10、cceptation de ladhsion/cohsion (rsistance la rupture) dun revtement - Partie 1: Essai de traction (ISO 16276-1:2007)Korrosionsschutz von Stahlbauten durch Beschichtungs-systeme - Beurteilung der Adhsion/Kohsion (Haftfestigkeit) einer Beschichtung und Kriterien fr deren Annahme - Teil 1: Abreiversuch

11、 (ISO 16276-1:2007) 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bib

12、liographical references concerning such national standards 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 translation under the responsibilit

13、y of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ir

14、eland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassa

15、rt, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16276-1:2007: EEN ISO 16276-1:2007 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Princi

16、ple6 5 Apparatus and materials.7 6 Procedure .7 6.1 General7 6.2 Field tests on coated structures 8 6.3 Preparation.8 6.4 Testing 9 6.5 Interpretation of results . 10 7 Expression of results . 11 8 Acceptance criteria. 12 9 Test report . 12 Bibliography. 13 Foreword This document (EN ISO 16276-1:200

17、7) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN, in collaboration 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 ide

18、ntical text or by endorsement, at the latest by November 2007, and conflicting national standards shall be withdrawn at the latest by November 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European

19、 Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

20、. EN ISO 16276-1:2007 (E) 3 Introduction The main purpose of this part of ISO 16276 is to supplement the ISO 12944 series with regard to the field assessment of, and acceptance criteria for, the adhesion/cohesion of a coating. To comply with this part of ISO 16276, laboratory testing of panels might

21、 be required. This part of ISO 16276 introduces the term “fracture strength” which includes both adhesion and cohesion. Adhesion and cohesion are defined in ISO 4618, whereas the ISO 12944 series uses the term “adhesion” only. NOTE This part of ISO 16276 is intended for the assessment of pull-off te

22、sting of paint coatings on steel structures on site. ISO 4624 specifies a pull-off test for laboratory use, 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 e

23、xtent of which will depend on the specification and on the durability required of the protective paint coating. An objective of this part of ISO 16276 is to provide uniformity in the assessment of the fracture strength of a coating and to establish acceptance/rejection criteria for protective paint

24、coatings. The method uses test equipment based on the pull-off principle. Protective paint systems which have poor adhesion/cohesion will normally fail at fracture strength values significantly lower than the values quoted in the specification. For a protective paint system with a particular fractur

25、e strength, a range of test values will be obtained from different types of equipment. Specifying test equipment that gives, for a particular fracture strength, the highest test values does not necessarily indicate a higher durability for that protective paint system. Also, high test values for a pa

26、rticular fracture strength do not necessarily indicate a high durability for that protective paint system. EN ISO 16276-1:2007 (E) 4 1 Scope This part of ISO 16276 specifies procedures for assessing the fracture strength of a protective paint coating of any thickness on a steel substrate of thicknes

27、s not less than 10 mm. The procedures given in this part of ISO 16276 are based on methods used with different types of pull-off test equipment. The results obtained using such different types of equipment are not comparable. NOTE 1 Substrates of less than 10 mm in thickness can be tested if they ar

28、e strengthened by the sandwich technique (see ISO 4624) or by the nature of the structure (e.g. I-beam or backing-plate). Otherwise, test panels with a thickness of at least 10 mm coated in the same way as the structure can be used, or the method specified ISO 16276-2 can be used. This part of ISO 1

29、6276 is only applicable if a fracture strength value is specified, together with the type of test equipment and the manufacturer of the equipment. Usually, this information is included in contract documentation. NOTE 2 A value for the fracture strength is only meaningful if the requirements concerni

30、ng the ambient conditions (see 6.4.2) are met. This part of ISO 16276 also specifies suitable equipment and defines inspection areas, sampling plans and acceptance/rejection criteria. It does not give any values of the fracture strength of different protective paint coatings. 2 Normative references

31、The following referenced 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 4624, Paints and varnishes Pull-off test for

32、adhesion ISO 12944-7, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 7: Execution and supervision of paint work ISO 12944-8, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 8: Development of specifications

33、 for new work and maintenance ISO 19840, Paints and varnishes Corrosion protection of steel structures by protective paint systems Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces EN ISO 16276-1:2007 (E) 5 3 Terms and definitions For the purposes of this docu

34、ment, the following terms and definitions apply. 3.1 fracture strength force required to exceed the attachment forces between coats or between coat and substrate (adhesion) and/or within a coat (cohesion) 3.2 adhesion phenomenon of attachment at the interface between a solid surface and another mate

35、rial 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 resulting from a single app

36、lication 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 section of the structure 4

37、 Principle Test cylinders (dollies) are fixed to the coating using a suitable adhesive and a force is exerted in order to cause a fracture. This force is measured by the equipment. EN ISO 16276-1:2007 (E) 6 5 Apparatus and materials 5.1 Tensile/pull-off test apparatus, meeting the requirements speci

38、fied in 6.1.6. The manufacturer and the model of the apparatus shall be as specified or as agreed between the interested parties. 5.2 Test cylinders (dollies), made of stainless steel or aluminium alloy, of suitable diameter (normally 20 mm), of sufficient thickness to ensure freedom from distortion

39、 during the test and suitable for use with the test apparatus. It is recommended that the length of the test cylinder be not less than half its diameter. The end faces shall be machined perpendicular to the long axis of the cylinder. 5.3 Adhesives, suitable for use with both the test cylinder and th

40、e protective paint system, e.g. 2-pack epoxy or 1-pack cyanoacrylate (see ISO 4624). Care shall be taken to avoid adhesives which might damage, or penetrate through, the coating. 5.4 Circular cutting device, the internal diameter of which shall not exceed the diameter of the test cylinder by more th

41、an 2 mm. 6 Procedure 6.1 General 6.1.1 As pull-off tests are destructive test methods, repair work will be necessary when they are used on coated structures. NOTE To avoid damage to the coated structure, test panels can be used (see 6.4.2). 6.1.2 The results of each of the procedures described are i

42、nfluenced by different aspects of the test conditions. There are some aspects that are common to all the procedures, and these are described below. 6.1.3 The test cylinders are supplied in various shapes and the force can be applied in various ways, such as hydraulic pressure, pneumatic pressure or

43、using compressed-spring assemblies. 6.1.4 The measurement equipment used shall be calibrated. If a calibration certificate is required, it shall be checked to ensure that it is current and relates to the instrument in use, i.e. has the same serial number. NOTE Adjustment and calibration are carried

44、out by the manufacturer or by an authorized organisation. 6.1.5 Prior to testing, a recently applied coating shall be dried/cured in accordance with the manufacturers recommendations. In the absence of manufacturers recommendations, the coating shall be dried/cured for at least 10 days in well-venti

45、lated conditions and at a substrate temperature in excess of 15 C and a relative humidity of less than 80 % prior to testing. NOTE 1 The age of the coating can affect the result of the test. Freshly applied coatings can have a lower fracture strength than those tested two or three months after appli

46、cation. The temperature, humidity and ventilation during drying/curing of the coating will also affect the fracture strength obtained. NOTE 2 If a coating is exposed to high humidity or water, it will absorb water, which can reduce its fracture strength. Upon drying, the strength will increase again

47、 to a certain extent, unless the coating has started to degrade or corrosion of the substrate has occurred. 6.1.6 The rate at which the force is applied to remove the test cylinder will affect the fracture strength obtained. The tensile stress shall therefore be applied in a direction perpendicular

48、to the plane of the coated substrate and shall be increased at a uniform rate, not greater than 1 MPa/s, such that fracture occurs within 90 s. Test equipment which does not meet this requirement is not suitable. EN ISO 16276-1:2007 (E) 7 Erratic or uneven application of the force can cause prematur

49、e failure of the coating and give misleading results. NOTE Manually operated equipment will not necessarily provide a uniform increase in the applied force. 6.1.7 If the test cylinder is of the type which is bored with a central hole, it is important to remove any adhesive in the central hole in order to obtain the optimum result. 6.1.8 If the coated structure is fabricated using high-strength steel, care shall be taken not to damage the steel surface. Damage to the steel surface could result in failure of the st