1、April 2013 Translation by DIN-Sprachendienst.English price group 10No 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).ICS
2、87.040!$,(“1990905www.din.deDDIN EN ISO 20567-3Paints and varnishes Determination of stone-chip resistance of coatings Part 3: Single-impact test with a free-flying impact body(ISO 20567-3:2012);English version EN ISO 20567-3:2012,English translation of DIN EN ISO 20567-3:2013-04Beschichtungsstoffe
3、Prfung der Steinschlagfestigkeit von Beschichtungen Teil 3: Einzelschlagprfung mit frei fliegendem Schlagkrper (ISO 20567-3:2012);Englische Fassung EN ISO 20567-3:2012,Englische bersetzung von DIN EN ISO 20567-3:2013-04Peintures et vernis Dtermination de la rsistence des revtements aux impacts de ca
4、illoux Partie 3: Essais de choc simple par corps percutant en vol libre (ISO 20567-3:2012);Version anglaise EN ISO 20567-3:2012,Traduction anglaise de DIN EN ISO 20567-3:2013-04SupersedesDIN 55996-3:2009-12www.beuth.deDocument comprises 16 pagesIn case of doubt, the German-language original shall be
5、 considered authoritative.03.13 DIN EN ISO 20567-3:2013-04 2 A comma is used as the decimal marker. National foreword This document (EN ISO 20567-3:2012) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secr
6、etariat: BSI, United Kingdom) in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Comm
7、ittee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 1514 DIN EN ISO 1514 ISO 2808 DIN EN ISO 2808 ISO 3270
8、 DIN EN 23270 ISO 15528 DIN EN ISO 15528 IEC 454-2 DIN EN 60454-2 (VDE 0340-2) DIN EN ISO 20567 consists of the following parts, under the general title Paints and varnishes Determination of stone-chip resistance of coatings: Part 1: Multi-impact testing Part 2: Single-impact test with a guided impa
9、ct body Part 3: Single-impact test with a free-flying impact body Amendments This standard differs from DIN 55996-3:2009-12 as follows: a) the text of ISO/DIS 20567-3:2011 has been adopted in full; b) the number of the standard has been changed; c) the standard has been editorially revised; the tech
10、nical substance of the former standard has not been changed. Previous editions DIN 55996-3: 2004-07, 2009-12 DIN EN ISO 20567-3:2013-04 3 National Annex NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for conditioning and testing DIN
11、EN ISO 1513, Paints and varnishes Examination and preparation of test samples 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 15528, Paints, varnishes and raw materials for paints and varnishes Samplin
12、g DIN EN 60454-2 (VDE 0340-2), Pressure-sensitive adhesive tapes for electrical purposes Part 2: Test methods DIN EN ISO 20567-3:2013-04 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20567-3 December 2012 ICS 87.040 English Version Paints and varnishes D
13、etermination of stone-chip resistance of coatings Part 3: Single-impact test with a free-flying impact body (ISO 20567-3:2012) Peintures et vernis Dtermination de la rsistance des revtements aux impacts de cailloux Partie 3: Essai de choc simple par corps percutant en vol libre (ISO 20567-3:2012) Be
14、schichtungsstoffe Prfung der Steinschlagfestigkeit von Beschichtungen Teil 3: Einzelschlagprfung mit frei fliegendem Schlagkrper (ISO 20567-3:2012) This European Standard was approved by CEN on 28 December 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
15、e 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. This European Stan
16、dard 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 members are the nat
17、ional standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Sl
18、ovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved
19、 worldwide for CEN national Members. Ref. No. EN ISO 20567-3:2012: E Contents PageForeword .3Introduction 41 Scope .52 Normative references 53 Principle 54 Apparatus and materials65 Calibration 76 Sampling 77 Test panels 77.1 Substrate 7.2 Preparation and coating 7.3 Thickness of the coating .8 Proc
20、edure.8.1 Conditioning of the test panels .8.2 Test conditions 8.3 Number of test runs 8.4 Preparation for the test .8.5 Determination .9 Evaluation 10 Precision .10.1 General .10.2 Repeatability limit, r 10.3 Reproducibility limit, R 11 Test report .Annex A (informative) Calibration of the apparatu
21、s .Bibliography .2DIN EN ISO 20567-3:2013-04 EN ISO 20567-3:2012 (E) 777777778888810129Foreword The text of (EN ISO 20567-3:2012) 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 w
22、hich 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 June 2013, and conflicting national standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibil
23、ity 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. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are b
24、ound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
25、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20567-3:2012 has been approved by CEN as a EN ISO 20567-3:2012 without any modification. 3DIN EN ISO 20567-3:2013-04EN ISO 20567-3:2012 (E) IntroductionIn the automotive in
26、dustry, multi-layer paint coatings are applied to car bodies for protection. Grit, road-metal and other materials can damage these coatings in such a way that individual layers come off or the whole coating delaminates from the substrate.Stone chipping can be simulated by means of single- and/or mul
27、ti-impact tests. Part 1 of this International Standard describes a multi-impact test, Parts 2 and 3 describe a single-impact test.4DIN EN ISO 20567-3:2013-04 EN ISO 20567-3:2012 (E) 1 ScopeThis part of ISO 20567 specifies a method for the evaluation of the resistance of automobile finishes and other
28、 coatings to the impact of a single, free-flying body projected onto the surface under test to simulate the impact of stones.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For unda
29、ted references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thicknessISO 3290-
30、1, Rolling bearings Balls Part 1: Steel ballsISO 15528, Paints, varnishes and raw materials for paints and varnishes SamplingEN 485-2, Aluminium and aluminium alloys Sheet, strip and plate Part 2: Mechanical propertiesEN 485-4, Aluminium and aluminium alloys Sheet, strip and plate Part 4: Tolerances
31、 on shape and dimensions for cold-rolled productsEN 573-3, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 3: Chemical composition and form of products3 PrincipleThe stone-chip resistance of the coating under test is determined by projecting a single, free-flyin
32、g body onto it in a test in which those parameters with a significant effect on the damage, i.e. the impact angle, speed, mass and geometry of the impact body, are defined. The temperature can be altered as required.The test result is expressed in terms of the size of the area that has been damaged,
33、 after removal of pieces of the coating which have delaminated from the substrate as a result of the impact, plus, in the case of multi-layer paint systems, details of the damage to each coating layer.5DIN EN ISO 20567-3:2013-04EN ISO 20567-3:2012 (E) 4 Apparatus and materials4.1 Single-impact teste
34、r, as shown in Figure 1.An impact body is accelerated by compressed air in a defined manner. The speed is determined by measuring the travel time between two light beams and then displayed. The test panel is mounted on a movable holder whose angle can be adjusted and whose temperature can be set in
35、the range from 20 C to +30 C.Key1 impact-body-accelerating tube 7 access door (for introducing the impact body)2 test panel 8 start valve3 test-panel holder 9 pressure chamber4 protective housing 10 charge valve5 light-beam device for measuring speed of impact body 11 pressure regulator6 control uni
36、t with display for impact-body speed and test-panel temperature12 compressed-air supplyFigure 1 Single-impact tester4.2 Impact body: hardened-steel ball of 2 mm nominal diameter with a mass of 0,033 g (a ball bearing in accordance with ISO 3290-1). Each steel ball shall be used only once.4.3 Magnify
37、ing glass, with 5 to 10 magnification.6DIN EN ISO 20567-3:2013-04 EN ISO 20567-3:2012 (E) 5 CalibrationA suitable calibration method for the apparatus is specified in Annex A.6 SamplingTake a representative sample of the coating material to be tested, as described in ISO 15528.Examine and prepare ea
38、ch sample for testing, as described in ISO 1513.7 Test panels7.1 SubstrateUse 200 mm 100 mm steel test panels that are between 0,7 mm and 1,0 mm thick.7.2 Preparation and coatingPrepare each test panel in accordance with ISO 1514 before coating and drying or stoving. Use the application method and d
39、rying or stoving conditions specified by the paint manufacturer.7.3 Thickness of the coatingDetermine the thickness, in micrometres, of the dry coating by one of the procedures specified in ISO 2808.8 Procedure8.1 Conditioning of the test panelsCondition the test panels, for at least 16 h at (23 2)
40、C and (50 5) % relative humidity (see ISO 3270) before carrying out the test.8.2 Test conditionsThe impact body shall be shot at the test panel at a speed of (250 10) km/h (69,4 2,8) m/s and at an angle of (2,0 0,5) to the normal.The preferred test temperatures are:a) (23 2) C;b) (0 2) C;c) (20 2) C
41、.8.3 Number of test runsCarry out at least five test runs on each of two test panels.8.4 Preparation for the testSet the test-panel holder to the required temperature. Set the pressure by means of the pressure regulator so that the speed of the impact body is within the range specified in 8.2, i.e.
42、set it to the value determined during calibration of the apparatus (see Clause A.3).7DIN EN ISO 20567-3:2013-04EN ISO 20567-3:2012 (E) 8.5 DeterminationMount the test panel on the holder, wait until the temperature has stabilized, load the impact body and start the test. In the case of multiple dete
43、rminations, move the test panel by approximately 10 mm each time. On completion of the test, remove any pieces of the coating which have delaminated from the substrate, e.g. by means of a jet of nitrogen at 40 bar (4 MPa) or adhesive tape1), or mechanically under a microscope with a knife or steel n
44、eedle.9 EvaluationEvaluation of the damage may be carried out visually by means of a microscope or magnifying glass (5 to 10 magnification) and templates (see Figure 2) or by optical imaging.Figure 2 Template for evaluating the damaged areaThe degree of damage is determined by measuring the total su
45、rface area (in square millimetres) of the damaged coating including the imprint of the impact body and shall be rounded to the nearest whole number.In addition to the degree of chipping, the main separation level or the layers of the coating system between which loss of adhesion occurred may be stat
46、ed.10 Precision10.1 GeneralThe precision of this method depends on the specific mechanical properties of the coatings and substrates. Thus low intermediate-coat adhesion with multi-layer systems or a film thickness which varies locally will result in an above-average degree of scatter in the measure
47、d damaged areas. The values specified below for the repeatability and reproducibility should therefore be regarded as typical average values.10.2 Repeatability limit, r The repeatability limit, r, is the value below which the absolute difference between two test results (each being the average of tw
48、o valid determinations) can be expected to lie, with a 95 % probability, when the 1) Adhesive tape with an adhesive strength between 6 N/25 mm width and 10 N/25 mm width (determined in accordance with IEC 60454-2) has proved to be suitable.8DIN EN ISO 20567-3:2013-04 EN ISO 20567-3:2012 (E) method is used under repeatability conditions, i.e. when the test results are obtained on identical test material by the same operator in the same laborato
