1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 20566:2013Paints and varnishes Determination of the scratchresistance of a coating systemusing a laboratory-scale car-wash (ISO 20566:2013)BS EN ISO 20566:2013 BRITISH
2、STANDARDNational forewordThis British Standard is the UK implementation of EN ISO20566:2013. It supersedes BS EN ISO 20566:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/10, Test methods for paints.A list of organizations represented on this c
3、ommittee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 71665 2ICS 43.020
4、; 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPI
5、SCHE NORM EN ISO 20566 February 2013 ICS 43.020; 87.040 Supersedes EN ISO 20566:2006English Version Paints and varnishes - Determination of the scratch resistance of a coating system using a laboratory-scale car-wash (ISO 20566:2013) Peintures et vernis - Dtermination de la rsistance la rayure dun s
6、ystme de peinture sur un poste de lavage automobile de laboratoire (ISO 20566:2013) Beschichtungsstoffe - Bestimmung der Kratzbestndigkeit von Beschichtungen mit einer Labor-Automobilwaschanlage (ISO 20566:2013) This European Standard was approved by CEN on 9 February 2013. CEN members are bound to
7、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 application to the CEN-CEN
8、ELEC 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 Management Centre has th
9、e 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, Lithuania, Luxemb
10、ourg, 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 Brussels 2013 CEN A
11、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20566:2013: EBS EN ISO 20566:2013EN ISO 20566:2013 (E) 3 Foreword This document (EN ISO 20566:2013) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collabo
12、ration 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 August 2013, and conflicting national sta
13、ndards shall be withdrawn at the latest by August 2013. 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 IS
14、O 20566:2006. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni
15、a, France, Germany, Greece, Hungary, 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 20566:2013 has been approved by CEN as
16、 EN ISO 20566:2013 without any modification. BS EN ISO 20566:2013ISO 20566:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Apparatus . 25 Washing suspension . 36 Sampling 47 Test panels 48 Procedure. 49 Eva
17、luation 510 Precision . 510.1 Repeatability limit r .510.2 Reproducibility limit R 511 Test report . 5Annex A (normative) Verification and calibration of the washing equipment . 7BS EN ISO 20566:2013ISO 20566:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide fede
18、ration 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 established has the right to be represented on that commi
19、ttee. 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 standardization.International Standards are drafted in accordanc
20、e 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 circulated to the member bodies for voting. Publication as an International Standard requires ap
21、proval 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 responsible for identifying any or all such patent rights.ISO 20566 was prepared by Technical Commit
22、tee 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 20566:2005), which has been technically revised. The main changes are:a) a “terms and definitions” clause has been added, defining the
23、 terms mar, scratch, double pass, test area and reflow effect;b) tolerances have been added to all key numerical values, such as dimensions;c) the spread of the spray jet has been changed from 60 to 65;d) the thickness of the test panels has been specified;e) the test procedure has been described in
24、 more detail;f) a visual examination of the test panels has been added.iv ISO 2013 All rights reservedBS EN ISO 20566:2013ISO 20566:2013(E)IntroductionWith this test procedure, it is important to note that the test results will not, over time, remain constant, as a result of changes to the brush mat
25、erial. As the brush ages, the test will become more severe. As a result, the test procedure is suitable only for comparative tests carried out at any one time and using relatively short runs. Readings obtained using equipment which has accumulated different total numbers of operating hours are not c
26、omparable with each other. ISO 2013 All rights reserved vBS EN ISO 20566:2013BS EN ISO 20566:2013Paints and varnishes Determination of the scratch resistance of a coating system using a laboratory-scale car-wash1 ScopeThis International Standard describes a test procedure for assessing the scratch r
27、esistance of organic paint coatings1), in particular paint coatings used in the automotive industry (i.e. for assessing their car-wash resistance). Machine-based washing is simulated in the laboratory environment using a rotating brush and synthetic dirt. The test conditions have been designed to be
28、 as close as possible to the real conditions in a car-wash. If the test parameters are suitably chosen, the method can also be used for testing protective plastics films and plastics components.2 Normative referencesThe following referenced documents are indispensable for the application of this doc
29、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of samples for testingISO 2813, Paints and varnishes Determination of specu
30、lar gloss of non-metallic paint films at 20, 60 and 85ISO 4618, Paints and varnishes Terms and definitionsISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction
31、 and designation systemISO 7724-1, Paints and varnishes Colorimetry Part 1: PrinciplesISO 7724-2, Paints and varnishes Colorimetry Part 2: Colour measurementISO 7724-3, Paints and varnishes Colorimetry Part 3: Calculation of colour differencesISO 13076, Paints and varnishes Lighting and procedure fo
32、r visual assessments of coatingsISO 13803, Paints and varnishes Determination of reflection haze on paint films at 20ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4618 a
33、nd the following apply.3.1mar, nblemish on the surface of a coating, extending over a particular area of the coating and visible due to the difference in the light-reflection properties of the area affected compared with the light-reflection properties of adjacent areas1) For the term “coating”, see
34、 ISO 4618.INTERNATIONAL STANDARD ISO 20566:2013(E) ISO 2013 All rights reserved 1BS EN ISO 20566:2013ISO 20566:2013(E)3.2scratch, ncut or gouge through the surface of a coating, made by contact with a sharp object3.3double passone back-and-forward movement of the test panel holder3.4test areaarea wh
35、ich is evaluated3.5reflow effectability of the coating surface to revert to its original appearance after damage such as scratching4 ApparatusThe apparatus2)shall comprise at least the following individual components:4.1 Washing brush:Diameter (1 000 40) mmWidth min. 300 mmMaterial polyethyleneProfi
36、le x-shaped, splicedBristle thickness (0,8 0,2) mmBristle length (440 20) mm visiblePenetration depth (100 20) mm (see Figure 1)Speed of brush rotation (127 5) min1, in the direction opposite to the direction of travel of the test panel holderThe replacement of washing brushes is decided by testing
37、a control panel. The control panel material shall be chosen to reflect changes in the washing brush, so that it is possible to differentiate between a new and a used brush. In practice, the maximum lifetime of the washing brush is often specified as between 30 h and 50 h.It is recommended that a con
38、trol panel coated with a black non-metallic paint and a clear coating on top be used. Gloss shall be 80 gloss units, measured at 20. The washing brush shall be replaced by a new brush if the gloss of the control panel changes by more than 6 gloss units compared with a new brush.4.2 Spray nozzles, ma
39、de of stainless steel:Spread of jet 65Rate of flow of washing suspension (2,2 0,2) l/min at (300 50) kPaThe two nozzles shall spray alternately, against the direction of travel of the test panel holder. They shall produce the specified spray pattern (see Annex A).2) Information on procuring the equi
40、pment is available from: DIN Deutsches Institut fr Normung e.V., NAB, Burggrafenstrasse 6, 10787 Berlin, Germany.2 ISO 2013 All rights reservedBS EN ISO 20566:2013ISO 20566:2013(E)4.3 Test panel holder:Feed speed (5,0 0,2) m/minPattern of movement If the brush is rotating clockwise, the right nozzle
41、 is spraying and the test panel holder travels from left to right (and vice versa) see Figure 1.Dimensions in millimetresKey1 washing brush2 spray nozzle3 test panel holder4 spray jet (centreline of jet strikes brush directly, 50 mm above test panel holder)aPenetration depth.Figure 1 Pattern of move
42、ment of washing brush and spray nozzles with respect to test panel holder4.4 Container, suitable for holding the washing suspension during the test.5 Washing suspensionPrepare a suspension consisting of (1,50 0,05) g of silica powder (silica micro-powder having a mean particle size of 24 m)3)per lit
43、re of tap water in a suitable container, mixing it by stirring vigorously. The water temperature shall be between 15 C and 30 C.The suspension shall be stirred continuously during the test in such a way that the silica powder does not settle on the bottom of the container as this would result in var
44、iations in the concentration.The suspension may be reused once the test equipment has come to a standstill. However, it is essential that the suspension be stirred thoroughly again before being reused.3) Information on procuring the silica powder is available from: DIN Deutsches Institut fr Normung
45、e.V., NAB, Burggrafenstrasse 6, 10787 Berlin, Germany. ISO 2013 All rights reserved 3BS EN ISO 20566:2013ISO 20566:2013(E)6 SamplingTake a representative sample of the product to be tested, as described in ISO 15528.Examine and prepare each sample for testing, as described in ISO 1513.If testing a c
46、learcoat, the basecoat shall be single shade of black.7 Test panelsTest panels shall be flat and free of deformations. The substrate and size shall be as agreed between the interested parties. The thickness of the test panels should preferably be between 0,5 mm and 5 mm. With other thicknesses, the
47、depth of penetration into the washing brush and the angle of approach of the brush shall be adjusted by setting the test-panel holder to the correct height.The spraying, drying/hardening and stoving parameters, and the ageing and conditioning before the test, shall be as agreed between the intereste
48、d parties.8 ProcedureCarry out the test at room temperature (20 C to 30 C).The optimum test area shall be identified for each test apparatus, especially after changing the brush, by a control test, as follows. Using a control panel (see Clause A.1), determine the area on the test panels in which the
49、 difference in gloss compared to the most scratched area is not more than 15 gloss units. Do not evaluate the area at least 5 cm wide at each end of the test panels or the areas at least 3 cm wide along the edges of the panels, parallel to the direction of travel of the test panels.Before carrying out a test, perform a preliminary run without any test panels, carrying out 10 washing operations (10 double passes), to distribute the washing suspension evenly in the apparatus.Make sure th
