1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 6272-1:2011Paints and varnishes Rapid-deformation (impact resistance) testsPart 1: Falling-weight test, large-area indenter (ISO 6272-1:2011)BS EN ISO 6272-1:2011 BRITI
2、SH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 6272-1:2011. It supersedes BS EN ISO 6272-1:2004,which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e S T I / 1 0 , T e s t m e t h o d s f o r p a i n t s
3、.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. BSI 2011 ISBN 978 0 580 68545 3 ICS 87.040 Compliance with a
4、British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
5、ISO 6272-1 August 2011 ICS 87.040 Supersedes EN ISO 6272-1:2004English Version Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 1: Falling-weight test, large-area indenter (ISO 6272-1:2011) Peintures et vernis - Essais de dformation rapide (rsistance au choc) - Partie 1: Ess
6、ai de chute dune masseavec pntrateur de surface importante (ISO 6272-1:2011)Beschichtungsstoffe - Prfung der Widerstandsfhigkeit bei schlagartiger Verformung (Schlagfestigkeit) - Teil 1: Prfung durch fallendes Gewichtsstck, groe Prfflche (ISO 6272-1:2011) This European Standard was approved by CEN o
7、n 22 July 2011. 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 bibliographical references concerning such national standards may
8、be obtained on application to the CEN-CENELEC 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 responsibility of a CEN member into its own language and notified to
9、 the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
10、mbourg, 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: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rig
11、hts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6272-1:2011: EBS EN ISO 6272-1:2011 EN ISO 6272-1:2011 (E) 3 Foreword This document (EN ISO 6272-1:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collabor
12、ation 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 February 2012, and conflicting national st
13、andards shall be withdrawn at the latest by February 2012. 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 EN
14、 ISO 6272-1:2004. 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, France, Germany, Greece, Hungary
15、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 6272-1:2011 has been approved by CEN as a EN ISO 6272-1:2011 without any modifica
16、tion. BS EN ISO 6272-1:2011ISO 6272-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Principle1 4 Apparatus.2 5 Sampling.2 6 Test panels.4 7 Procedure.5 8 Precision.6 9 Test report7 BS EN ISO 6272-1:2011ISO 6272-1:2011(E) iv ISO 2011 All rights r
17、eservedForeword 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 committees. Each member body interested in a subject for wh
18、ich a technical committee has been established has the right to be represented on that committee. 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
19、matters of electrotechnical standardization. International Standards are drafted in accordance with 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 ci
20、rculated to the 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 document may be the subject of patent rights. ISO shall not be held respo
21、nsible for identifying any or all such patent rights. ISO 6272-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (ISO 6272-1:2002), which has been technic
22、ally revised. The main technical changes are as follows: a) in the description of the guide tube (see 4.1.3) and in Figure 1, the play permitted between the guide tube and the falling weight has been changed; b) a “principle” clause has been added; c) the test is no longer carried out at a specified
23、 relative humidity; instead, the relative humidity is simply recorded but the test has to be completed within a specified length of time after conditioning the test panels; d) the supplementary test conditions (formerly Annex A) have been incorporated in the test report. ISO 6272 consists of the fol
24、lowing parts, under the general title Paints and varnishes Rapid-deformation (impact resistance) tests: Part 1: Falling-weight test, large-area indenter Part 2: Falling-weight test, small-area indenter BS EN ISO 6272-1:2011INTERNATIONAL STANDARD ISO 6272-1:2011(E) ISO 2011 All rights reserved 1Paint
25、s and varnishes Rapid-deformation (impact resistance) tests Part 1: Falling-weight test, large-area indenter 1 Scope This part of ISO 6272 describes a method for evaluating the resistance of a dry film of paint, varnish or related product to cracking or peeling from a substrate when it is subjected
26、to a deformation caused by a falling weight, with a 20-mm-diameter spherical indenter, dropped under standard conditions. NOTE The terms “impact” and “impact resistance” are used in the title and text of this part of ISO 6272, but an important characteristic of the apparatus used is that it should p
27、roduce rapid deformation rather than a true impact. The method described can be applied either as a pass/fail test, the test being carried out from one drop height and with a specified mass, so as to test compliance with a particular specification; or as a classification test, to determine, by gradu
28、ally increasing the drop height and/or the mass, the minimum mass and/or drop height for which the coating cracks or peels from its substrate. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cite
29、d applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1513, Paints and varnishes Examination and preparation of test samples ISO 1514, Paints and varnishes Standard panels for testing ISO 2808, Paints and varnishes Determination of f
30、ilm thickness ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing ISO 13076, Paints and varnishes Lighting and procedure for visual assessments ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3 Principle The
31、 coating under test is applied to suitable, thin (normally metal) panels. After the coating has cured, a standard weight is dropped on to each panel from a height that will cause deformation of the coating and the substrate. The test can be carried out with the coated side of the panel facing upward
32、s (i.e. towards the falling BS EN ISO 6272-1:2011ISO 6272-1:2011(E) 2 ISO 2011 All rights reservedweight) or downwards (i.e. away from the weight). By gradually increasing the height from which the weight drops, the point at which failure occurs can be determined. Films generally fail by cracking, w
33、hich is made more visible by the use of a magnifier. 4 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 4.1 Falling-weight apparatus, compromising the elements described in 4.1.1 to 4.1.6. 4.1.1 Base stand, of sufficient mass to support the die (4.1.4). 4.1.2 Falli
34、ng weights (see Figure 1), the head having the shape of a spherical segment of diameter (20 0,3) mm, and a total mass of (1 000 10) g or (2 000 20) g, unless otherwise specified. 4.1.3 Vertical guide tube (see Figures 1 and 2), to direct the falling weight (4.1.2) perpendicularly on to the test pane
35、l. The guide tube shall be graduated in millimetres to indicate the distance above the surface of the test panel. To avoid excessive friction and to ensure accurate guidance, the difference between the inner diameter of the guide tube and the outer diameter of the falling weight shall be (0,7 0,2) m
36、m and the distance between the bottom end of the guide tube and the top of the test panel shall be not more than 45 mm. 4.1.4 Die (see Figure 1), ring-shaped with an inner diameter of (27 0,3) mm. The inner upper edge of the ring shall be rounded, with a radius of curvature of (0,9 0,2) mm. The mini
37、mum height of the ring shall be 20 mm. 4.1.5 Clamping sleeve (see Figures 1 and 2), to hold the test panel in position. The inner diameter at the bottom shall be the same as that of the die (27 0,3) mm; however, it is important to ensure that the head of the weight can travel smoothly through the cl
38、amping sleeve. 4.1.6 Stops (see Figure 2), of different thicknesses, to limit the indentation depth of the falling weight. 4.2 Viewing lens, with a magnification of 10. 5 Sampling Take a representative sample of the coating material to be tested (or of each product in the case of a multi-coat system
39、), as described in ISO 15528. Examine and prepare each sample for testing, as described in ISO 1513. BS EN ISO 6272-1:2011ISO 6272-1:2011(E) ISO 2011 All rights reserved 3Dimensions in millimetres Key 1 guide tube 2 weight 3 additional weight(s), if required 4 clamping sleeve 5 die aThe difference b
40、etween the inner diameter of the guide tube and the outer diameter of the falling weight is (0,7 0,2) mm. Figure 1 Falling-weight apparatus showing required dimensions BS EN ISO 6272-1:2011ISO 6272-1:2011(E) 4 ISO 2011 All rights reservedKey 1 guide tube 2 falling weight 3 stops 4 clamping sleeve 5
41、die 6 test panel Figure 2 Side view of falling-weight apparatus 6 Test panels 6.1 Substrate If a metal panel is used, it shall conform to the requirements of ISO 1514. Whatever the panel material, the panels shall be planar, free from distortion and at least 0,25 mm thick. The dimensions shall be su
42、ch as to allow the test to be carried out at at least five different positions not less than 40 mm from each other and not less than 20 mm from the edge of the panel. Measure the thickness to the nearest 0,01 mm. BS EN ISO 6272-1:2011ISO 6272-1:2011(E) ISO 2011 All rights reserved 56.2 Preparation a
43、nd coating Prepare metal test panels in accordance with ISO 1514. Whatever the panel material, coat the prepared panel by the method specified by the manufacturer of the product or system under test to give the dry-film thickness specified by the manufacturer, or by a method agreed upon between the
44、interested parties to give a dry-film thickness agreed upon between the interested parties. The coating method and dry-film thickness used shall be included in the test report see Clause 9, items c) 2) and c) 4). 6.3 Drying Dry (or stove) and age (if applicable) each coated test panel for the time,
45、and under the conditions, specified by the manufacturer of the product or system under test, or as agreed between the interested parties. The time and conditions used shall be included in the test report see Clause 9, item c) 3). 6.4 Thickness of coating Determine the thickness, in micrometres, of t
46、he dried coating by one of the procedures specified in ISO 2808. Make the measurements at, or as near as possible to, the positions at which the test is to be carried out. Use only test panels for which the film thickness values do not differ from the specified or agreed film thickness by more than
47、10 %. 7 Procedure 7.1 General Before testing, condition the coated panels at a temperature of (23 2) C and a relative humidity of (50 5) % (or at another temperature and humidity, agreed between the interested parties, from those specified in ISO 3270) for a minimum period of 16 h. Begin the test pr
48、ocedure as soon as possible after conditioning, but in any case complete it not later than 30 min after removal of the test panels from conditioning. Mount the apparatus on a firm surface (for example, concrete, steel or stone). Carry out the test at (23 2) C or at another temperature, agreed betwee
49、n the interested parties, from those specified in ISO 3270. State the test temperature at which the test was carried out in the test report. Measure the relative humidity during the test and state it in the test report. 7.2 Pass/fail test (using a specified mass) Ensure that the guide tube (4.1.3) is vertical. Attach additional weight(s), if required, to the weight in order to achieve the required loading. Adjust the height of the weight to the required release-point (using the gra
