1、November 2011 Translation by DIN-Sprachendienst.English price group 9No part of this translation 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).IC
2、S 87.040!$vT4“1834917www.din.deDDIN EN ISO 6272-2Paints and varnishes Rapid-deformation (impact resistance) tests Part 2: Falling-weight test, small-area indenter (ISO 6272-2:2011)English translation of DIN EN ISO 6272-2:2011-11Beschichtungsstoffe Prfung der Widerstandsfhigkeit bei schlagartiger Ver
3、formung (Schlagfestigkeit) Teil 2: Prfung durch fallendes Gewichtsstck, kleine Prfflche (ISO 6272-2:2011)Englische bersetzung von DIN EN ISO 6272-2:2011-11Peintures et vernis Essais de dformation rapide (rsistance au choc) Partie 2: Essai de chute dune masse avec pntrateur de surface rduite(ISO 6272
4、-2:2011)Traduction anglaise de DIN EN ISO 6272-2:2011-11SupersedesDIN EN ISO 6272-2:2006-08www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 12 pages11.11 DIN EN ISO 6272-2:2011-11 2 A comma is used as the decimal marker. National forewor
5、d This standard has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secretariat: BSI, United Kingdom) in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The
6、 responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. DIN EN ISO 6272 consists of t
7、he following 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 The DIN Standards corresponding to the International Standards referred to in this document
8、are as follows: ISO 1513 DIN EN ISO 1513 ISO 1514 DIN EN ISO 1514 ISO 2808 DIN EN ISO 2808 ISO 3270 DIN EN 23270 ISO 13076 DIN EN ISO 13076 ISO 15528 DIN EN ISO 15528 Amendments This standard differs from DIN EN ISO 6272-2:2006-08 as follows: a) all non-SI units have been deleted; b) the definition
9、has been deleted because the term “impact” is incorrect for this test; c) a figure showing the test apparatus has been added; d) the test is no longer carried out at a specified relative humidity; instead, the relative humidity is simply recorded but the test has to be completed within a specified l
10、ength of time after conditioning the test panels; e) a pin-hole detector is no longer used to detect holes in the coating under test; f) the precision data have been deleted because the method is slightly different from the ASTM method to which the precision data applied; g) the supplementary test c
11、onditions (formerly Annex A) have been incorporated in the test report. Previous editions DIN EN ISO 6272-2: 2006-08 DIN EN ISO 6272-2:2011-11 3 National Annex NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for conditioning and testi
12、ng DIN EN ISO 1513, Paints and varnishes Examination and preparation of samples for testing DIN EN ISO 1514, Paints and varnishes Standard panels for testing DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 13076, Paints and varnishes Lighting and procedure for visual
13、 assessments DIN EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling DIN EN ISO 6272-2:2011-11 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6272-2 August 2011 ICS 87.040 Supersedes EN ISO 6272-2:2006English Version Paints
14、 and varnishes - Rapid-deformation (impact resistance) tests - Part 2: Falling-weight test, small-area indenter (ISO 6272-2:2011) Peintures et vernis - Essais de dformation rapide (rsistance au choc) - Partie 2: Essai de chute dune masseavec pntrateur de surface rduite (ISO 6272-2:2011) Beschichtung
15、sstoffe - Prfung der Widerstandsfhigkeit bei schlagartiger Verformung (Schlagfestigkeit) - Teil 2: Prfung durch fallendes Gewichtsstck, kleine Prfflche (ISO 6272-2:2011) This European Standard was approved by CEN on 13 August 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regula
16、tions 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 Centre or to any CEN member
17、. 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 the official versions. CEN
18、 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
19、pain, 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 rights of exploitation in any form and by any means reserved worldwide for CEN national
20、 Members. Ref. No. EN ISO 6272-2:2011: EEN ISO 6272-2:2011 (E) 2 Contents PageForeword31 Scope 42 Normative references 43 Principle44 Apparatus .55 Reagents.56 Sampling.57 Test panels .58 Procedure .79 Precision.810 Test report 8DIN EN ISO 6272-2:2011-11 EN ISO 6272-2:2011 (E) 3 Foreword This docume
21、nt (EN ISO 6272-2:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration 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 pu
22、blication of an identical text or by endorsement, at the latest by February 2012, and conflicting national standards 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 CEN
23、ELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 6272-2:2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
24、lgium, Bulgaria, Croatia, 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 the United Kingdom. Endorse
25、ment notice The text of ISO 6272-2:2011 has been approved by CEN as a EN ISO 6272-2:2011 without any modification. DIN EN ISO 6272-2:2011-11 EN ISO 6272-2:2011 (E) 4 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 c
26、racking or peeling from a substrate when it is subjected to a deformation caused by a falling weight, dropped under standard conditions, acting on a small-area spherical indenter. NOTE The terms “impact” and “impact resistance” are used in the title and text of this part of ISO 6272, but an importan
27、t characteristic of the apparatus used is that it should produce rapid deformation rather than a true impact. Because of the poor reproducibility of this test method, the method should be restricted to testing in only one laboratory when the results are expressed as numerical values. Interlaboratory
28、 agreement is improved when ranking is used in place of numerical values. 2 Normative references 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 referenc
29、ed 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 film thickness ISO 3270, Paints and varnishes and their raw materials
30、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 coating under test is applied to suitable thin metal panels. After t
31、he coatings have cured, a standard weight is dropped a distance so as to strike an indenter that deforms the coating and the substrate. The test can be carried out with the coated side of the panel facing upwards (i.e. towards the falling weight and indentor) or downwards (i.e. away from the weight
32、and indentor). By gradually increasing the distance the weight drops, the point at which failure occurs can be determined. Films generally fail by cracking, which is made more visible by the use of a magnifier or, on steel, by the application of a copper sulfate solution. DIN EN ISO 6272-2:2011-11 E
33、N ISO 6272-2:2011 (E) 5 4 Apparatus 4.1 Falling-weight apparatus (see Figure 1), consisting basically of a vertical tube to guide a cylindrical weight that is dropped on an indenter resting on the test panel and including the components described in 4.1.1 to 4.1.4. 4.1.1 Guide tube, 0,6 m to 1,2 m l
34、ong, mounted vertically on a baseplate. A slot is cut lengthwise on one side of the tube to act as a guide for a cylindrical weight that fits inside the tube. Graduations are marked in millimetres along the slot. The base is constructed so that a thin flat panel can be inserted 50 mm below the tube.
35、 4.1.2 Weight, consisting of a metal cylinder made to fit inside the guide tube. A pin is fitted into one side of the weight to act as a guide by riding in the slot in the tube, to serve as a handle by which the weight can be raised and released and to indicate the height in millimetres. The mass of
36、 the weight is either (1 000 10) g or (2 000 20) g. 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 (1 0,2) mm. 4.1.3 Indenter, made of hardened steel (55 HRC to 60 HRC), wi
37、th a mass of (150 15) g and with a hemispherical head having a diameter of either (12,7 0,06) mm or (15,9 0,06) mm. The head rests on the test panel and the indenter is held vertically by a guide ring. To avoid excessive friction and to ensure accurate guidance, the difference between the inner diam
38、eter of the guide ring and the outer diameter of the indenter shall be (0,1 0,05) mm. 4.1.4 Panel support, consisting of a steel fixture with a cylindrical hole of diameter (16,3 0,1) mm centred under the indenter to support the test panel. 4.2 Viewing lens, with a magnification of 10. 5 Reagents 5.
39、1 Acidified copper sulfate (CuSO4) solution, prepared by dissolving 10 g of CuSO45 H2O in 90 g of hydrochloric acid, c(HCI) 1,0 mol/l. 6 Sampling Take a representative sample of the coating material to be tested (or of each product in the case of a multi-coat system), as described in ISO 15528. Exam
40、ine and prepare each sample for testing, as described in ISO 1513. 7 Test panels 7.1 Substrate The substrate shall be metal, conforming to the requirements of ISO 1514. The panels shall be planar, free from distortion and at least 0,25 mm thick. The dimensions shall be such as to allow the test to b
41、e 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. DIN EN ISO 6272-2:2011-11 EN ISO 6272-2:2011 (E) 6 Dimensions in millimetres Key 1 guide tube 2 weight 3 indenter,
42、nose diameter 15,9 mm 4 indenter, nose diameter 12,7 mm 5 panel support 6 guide ring Figure 1 Falling-weight apparatus showing required dimensions 7.2 Preparation and coating Prepare each test panel (7.1) in accordance with ISO 1514 and then coat it by the method specified by the manufacturer of the
43、 product or system under test to give the dry-film thickness specified by the manufacturer, or coat it by a method agreed upon between the 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 t
44、he test report see Clause 10, items c) 2) and c) 4). DIN EN ISO 6272-2:2011-11 EN ISO 6272-2:2011 (E) 7 7.3 Drying Dry (or stove) and age (if applicable) each coated test panel for the time, and under the conditions, specified by the manufacturer of the product or system under test, or as agreed bet
45、ween the interested parties. The time and conditions used shall be included in the test report see Clause 10, item c) 3). 7.4 Thickness of coating Determine the thickness, in micrometres, of the dried coating by one of the procedures specified in ISO 2808. Make the measurements at, or as near as pos
46、sible 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 10 %. 8 Procedure 8.1 General Before testing, condition the coated panels at a temperature of (23 2) C and a
47、 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 procedure as soon as possible after conditioning, but in any case complete it not later than 30 min after remo
48、val 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 between the interested parties, from those specified in ISO 3270. State the test temperature at which the test was
49、 carried out in the test report. Measure the relative humidity during the test and state it in the test report. 8.2 Classification test (to determine the minimum drop height which will cause cracking or peeling) Install the indenter having the head diameter specified or agreed upon. Place a test panel in the apparatus with the coated face up or down, as specified or agreed upon. Be sure the panel is flat against the panel support and that the indenter is in contact with the top sur
