1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 20567-3:2012Paints and varnishes Determination of stone-chip r e s i s t a n c e o f c o a t i n g sPart 3: Single-impact test with a free-flying impact bodyBS EN ISO 2
2、0567-3:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 20567-3:2012.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on this committee can be obtained on req
3、uest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 70813 8 ICS 87.040 Compliance with a British
4、 Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2
5、0567-3 December 2012 ICS 87.040 English Version Paints and varnishes - Determination 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
6、3: Essai de choc simple par corps percutant en vol libre (ISO 20567-3:2012) Beschichtungsstoffe - 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 me
7、mbers 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 be obtained on applica
8、tion 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 the CEN-CENELEC Manag
9、ement 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia
10、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, 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
11、Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20567-3:2012: EBS EN ISO 20567-3:2012EN ISO 20567-3:2012 (E) 3 Foreword The text of (EN ISO 20567-3:2012) has been prepared by Technical Committee ISO/TC 35 “Paints
12、andvarnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat ofwhich is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by June 2013, and conf
13、licting national standards shall be withdrawn atthe latest by June 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to t
14、he CEN/CENELEC Internal Regulations, the national standards organisations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,Hun
15、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,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
16、 anymodification. BS EN ISO 20567-3:2012ISO 20567-3:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Principle 14 Apparatus and materials 25 Calibration 36 Sampling 37 Test panels 37.1 Substrate 37.2 Preparation and coating 37.3 Thick
17、ness of the coating . 38 Procedure. 38.1 Conditioning of the test panels . 38.2 Test conditions 38.3 Number of test runs 38.4 Preparation for the test . 38.5 Determination . 49 Evaluation 410 Precision . 410.1 General . 410.2 Repeatability limit, r 410.3 Reproducibility limit, R 511 Test report . 5A
18、nnex A (informative) Calibration of the apparatus 6Bibliography 8BS EN ISO 20567-3:2012ISO 20567-3:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
19、ally 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. International organizations, governmental and non-governmental, in liaison with ISO, also take part in t
20、he work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all 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 I
21、nternational Standards. Draft International Standards adopted by the technical committees are circulated 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
22、 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 20567-3 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.ISO 20
23、567 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 impact body Part 3: Single-impact test with a free-flying impact bodyiv ISO 2012 All rights rese
24、rvedBS EN ISO 20567-3:2012ISO 20567-3:2012(E)IntroductionIn the automotive industry, 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
25、 the substrate.Stone chipping can be simulated by means of single- and/or multi-impact tests. Part 1 of this International Standard describes a multi-impact test, Parts 2 and 3 describe a single-impact test. ISO 2012 All rights reserved vBS EN ISO 20567-3:2012BS EN ISO 20567-3:2012Paints and varnish
26、es Determination of stone-chip resistance of coatings Part 3: Single-impact test with a free-flying impact body1 ScopeThis part of ISO 20567 specifies a method for the evaluation of the resistance of automobile finishes and other coatings to the impact of a single, free-flying body projected onto th
27、e 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 undated references, the latest edition of the referenced document (includin
28、g 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 3290-1, Rolling bearings Balls Part 1: Steel ballsISO 15528, Paints, varnish
29、es 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 on shape and dimensions for cold-rolled productsEN 573-3, Aluminium an
30、d 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-flying body onto it in a test in which those parameters with a significant e
31、ffect 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, after removal of pieces of the coating which have delaminated from the
32、 substrate as a result of the impact, plus, in the case of multi-layer paint systems, details of the damage to each coating layer.INTERNATIONAL STANDARD ISO 20567-3:2012(E) ISO 2012 All rights reserved 1BS EN ISO 20567-3:2012ISO 20567-3:2012(E)4 Apparatus and materials4.1 Single-impact tester, as sh
33、own 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 the rang
34、e 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 unit with d
35、isplay 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 Magnifying glas
36、s, with 5 to 10 magnification.2 ISO 2012 All rights reservedBS EN ISO 20567-3:2012ISO 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
37、 prepare each 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 m
38、ethod and drying 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
39、 at (23 2) 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;
40、c) (20 2) C.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
41、 8.2, i.e. set it to the value determined during calibration of the apparatus (see Clause A.3). ISO 2012 All rights reserved 3BS EN ISO 20567-3:2012ISO 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 te
42、st. In the case of multiple determinations, 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 mi
43、croscope with a knife or steel needle.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 dete
44、rmined by measuring the total surface 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
45、of adhesion occurred may be stated.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
46、degree of scatter in the measured 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 resul
47、ts (each being the average of two 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.4 ISO 2012 All rights reserv
48、edBS EN ISO 20567-3:2012ISO 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 laboratory within a short period of time using the same apparatus.For this method, r is typically 5 % (relativ
49、e to the average of the two test results).10.3 Reproducibility limit, R The reproducibility limit, R, is the value below which the absolute difference between two test results (each being the average of two valid determinations) can be expected to lie, with a 95 % probability, when the method is used under reproducibility conditions, i.e. when the test results are obtained on identical test material by operators in different laboratories using different apparatus.For this method, R
