1、BS EN ISO 20567-2:2017Paints and varnishes Determination of stone-chipresistance of coatingsPart 2: Single-impact test with a guidedimpact body (ISO 20567-2:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 20567-2:2017 BRITISH STANDARDNational forewordT
2、his British Standard is the UK implementation of EN ISO 20567-2:2017. It supersedes BS EN ISO 20567-2:2006 which iswithdrawn.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 obtai
3、ned 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. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 87404 8 ICS 87.040 Compliance with
4、a British 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 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EURO
5、PISCHE NORM EN ISO 20567-2 February 2017 ICS 87.040 Supersedes EN ISO 20567-2:2006English Version Paints and varnishes - Determination of stone-chip resistance of coatings - Part 2: Single-impact test with a guided impact body (ISO 20567-2:2017) Peintures et vernis - Dtermination de la rsistance des
6、 revtements aux impacts de cailloux - Partie 2: Essais de chocs simple par corps percutant guid (ISO 20567-2:2017) Beschichtungsstoffe - Prfung der Steinschlagfestigkeit von Beschichtungen - Teil 2: Einzelschlagprfung mit gefhrtem Schlagkrper (ISO 20567-2:2017) This European Standard was approved by
7、 CEN on 5 November 2016. 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 stand
8、ards may 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 no
9、tified to 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary,
10、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-C
11、ENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20567-2:2017 EBS EN ISO 20567-2:2017EN ISO 20567-2:2017 (E) 3 European foreword This document (EN ISO 20567-2:2017
12、) 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 publication of an identi
13、cal text or by endorsement, at the latest by August 2017 and conflicting national standards shall be withdrawn at the latest by August 2017. 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 resp
14、onsible for identifying any or all such patent rights. This document supersedes EN ISO 20567-2:2006. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
15、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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey an
16、d the United Kingdom. Endorsement notice The text of ISO 20567-2:2017 has been approved by CEN as EN ISO 20567-2:2017 without any modification. BS EN ISO 20567-2:2017ISO 20567-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus and
17、 materials 26 Test panels 26.1 Substrate 26.2 Preparation and coating 26.3 Thickness of the coating . 27 Procedure. 47.1 Calibration 47.2 Conditioning of the test panels . 47.3 Test conditions 47.4 Number of test runs 47.5 Determination . 58 Evaluation 59 Precision . 69.1 Repeatability limit, r 69.2
18、 Reproducibility limit, R .610 Test report . 7Annex A (informative) Examples of suitable procedures for removing loose paint . 8Annex B (normative) Calibration of the test apparatus 9 ISO 2017 All rights reserved iiiContents PageBS EN ISO 20567-2:2017ISO 20567-2:2017(E)ForewordISO (the International
19、 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 which a technical committee has been est
20、ablished 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 matters of electrotechnical standardiz
21、ation.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance wi
22、th the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 responsible for identifying any or all such patent rights. Details of any
23、patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.F
24、or an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The comm
25、ittee responsible for this document is 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 20567-2:2005), which has been technically revised with the following main changes: a specification
26、has been added, when the calibration of the apparatus shall be made; reference to optical imaging has been deleted; the clause on sampling has been deleted; the description of suitable methods for removal of loose paint have been transferred to an informative annex as examples, and, for the method u
27、sing adhesive tape, the adhesive strength of the tape is no longer specified; some minor corrections have been made; this document is revised editorially and the normative references have been updated.A list of all parts in the ISO 20567 series can be found on the ISO website.iv ISO 2017 All rights
28、reservedBS EN ISO 20567-2:2017ISO 20567-2:2017(E)IntroductionIn the automobile 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
29、from the substrate.Stone chipping can be simulated by means of single- and/or multi-impact tests. ISO 20567-1 describes multi-impact testing; ISO 20567-2 and ISO 20567-3 describe single-impact tests. ISO 2017 All rights reserved vBS EN ISO 20567-2:2017BS EN ISO 20567-2:2017Paints and varnishes Deter
30、mination of stone-chip resistance of coatings Part 2: Single-impact test with a guided impact body1 ScopeThis document specifies a method for the evaluation of the resistance of automobile finishes and other coatings to the impact of a wedge-shaped body projected onto the surface under test to simul
31、ate the impact of stones.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
32、nced document (including any amendments) applies.ISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thicknessISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testingEN 573-3, Aluminium
33、and aluminium alloys Chemical composition and form of wrought products Part 3: Chemical composition and form of products3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC
34、 Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 PrincipleThe stone-chip resistance of the coating under test is checked by projecting a defined impact body onto it. The impact body used in the test has a wedge-shaped cutting e
35、dge to obtain a damage pattern equivalent to that produced in a multi-impact test. The wedge-shaped impact body is pushed onto the coating under test by the transmission of a pulse of energy from a steel ball accelerated using compressed air.Loose fragments of coating material are removed.The stone-
36、chip resistance is evaluated by measuring the total width of the delaminated coating, including the mark left by the wedge.INTERNATIONAL STANDARD ISO 20567-2:2017(E) ISO 2017 All rights reserved 1BS EN ISO 20567-2:2017ISO 20567-2:2017(E)5 Apparatus and materialsOrdinary laboratory apparatus, togethe
37、r with the following.5.1 Single-impact tester.Figure 1 shows the upper part of the test apparatus.Figure 2 shows the shape of the impact body and its dimensions. The impact body shall be made of hardened steel (hardness 60 HRC to 66 HRC).The test panel is inserted on the tester with the wedge-shaped
38、 end of the impact body touching the coated test panel and the spring exerting a slight pressure on the body. A steel ball of mass inferior to that of the impact body is accelerated by a compressed-air blast (p = 300 kPa) and transmits part of its energy to the impact body, which then strikes the te
39、st panel.NOTE 100 kPa = 1bar.The impact body shall be checked, and replaced if necessary, after a maximum of 500 test runs (i.e. after 500 impacts) or at the end of the series of tests during which the impact body passes the point at which it has been used for a total of 500 test runs.6 Test panels6
40、.1 SubstrateUse test panels of at least 100 mm 100 mm in size that are at least 0,7 mm thick.6.2 Preparation and coatingPrepare each test panel in accordance with ISO 1514 before coating and drying or stoving it. Use the application method specified by the paint manufacturer.6.3 Thickness of the coa
41、tingDetermine the thickness, in micrometres, of the dry coating by one of the procedures specified in ISO 2808.2 ISO 2017 All rights reservedBS EN ISO 20567-2:2017ISO 20567-2:2017(E)Key1 counterweight (mass exceeding 1 kg) 5 housing2 test panel 6 steel ball, hardness 60 HRC to 66 HRC3 impact body 7p
42、ipe, bore 8600 015,mm4 steel spring, diameter of wire 0,8 mm, 2,5 windings 8 compressed airFigure 1 Upper part of the test apparatus showing position of impact body ISO 2017 All rights reserved 3BS EN ISO 20567-2:2017ISO 20567-2:2017(E)Dimensions in millimetresFigure 2 Impact body7 Procedure7.1 Cali
43、brationInstructions for the calibration of the tester are given in Annex B.7.2 Conditioning of the test panelsCondition the test panels for at least 16 h at (23 2) C and (50 5) % relative humidity before carrying out the test (in accordance with ISO 3270).7.3 Test conditionsCarry out the test at roo
44、m temperature, i.e. 18 C to 28 C. State the temperature in the test report.After conditioning, ensure that condensation does not form prior to or during the test.7.4 Number of test runsUnless otherwise agreed, each test shall comprise three test runs.4 ISO 2017 All rights reservedBS EN ISO 20567-2:2
45、017ISO 20567-2:2017(E)7.5 DeterminationPrior to starting the test, set the pressure of the compressed-air supply to 300 kPa.Place the test panel on the test apparatus with the coated side facing towards the impact body (see Figure 1), place a counterweight (of mass exceeding 1 kg) on it and turn on
46、the compressed air to accelerate the steel ball and activate the impact body.When several impacts are to be delivered to one test panel, turn off the compressed air after each impact, move the panel by about 20 mm, replace the counterweight and then repeat the impact.Remove any loose paint from the
47、test area. Examples of suitable methods are given in Annex A. The method for removing the loose paint shall be agreed between the interested parties and shall be stated in the test report.8 EvaluationDetermine the extent of the damage: by measuring the total width, in millimetres, of the delaminated
48、 coating, including the mark left by the wedge; by specifying, in addition, if possible, the main separation level or the layers of the paint system between which loss of adhesion occurred.An example of the result of a test run is shown in Figure 3. Examples of defects caused are shown in Figure 4.K
49、ey1 substrate 4 filler2 phosphate coat 5 top coat3 cathodic electro-deposition coating 6 width of defectFigure 3 Example of a result of a test run ISO 2017 All rights reserved 5BS EN ISO 20567-2:2017ISO 20567-2:2017(E)Dimensions in millimetresFigure 4 Examples of defects9 Precision9.1 Repeatability limit, rThe repeatability limit, r, is the value below which the absolute difference between two test results can be expected to lie, with a 95 % probability, when this method is used under repeatability con
