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1、BRITISH STANDARD BS ISO 20566:2005 Paints and varnishes Determination of the scratch resistance of a coating system using a laboratory car-wash ICS 43.020; 87.040 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 20566:2005 This Briti
2、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 23 February 2005 BSI 23 February 2005 ISBN 0 580 45553 X National foreword This British Standard reproduces verbatim ISO 20566:2005 and implements it as the UK national standard. The UK participation in i
3、ts preparation was entrusted to Technical Committee STI/10, Test methods for paints, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications r
4、eferred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary pr
5、ovisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretati
6、on, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 8, an ins
7、ide back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Refer
8、ence number ISO 20566:2005(E) OSI 5002 INTERNATIONAL STANDARD ISO 20566 First edition 2005-02-15 Paints and varnishes Determination of the scratch resistance of a coating system using a laboratory car-wash Peintures et vernis Dtermination de la rsistance la rayure dun systme de peinture sur un poste
9、 de lavage automobile de laboratoire BS ISO 20566:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp
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14、9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dna ii ISO 5002 Allr ithgsr esedevr BS ISO 20566:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) I SO 5002 All irthgs ersedevr iii Contents Page Fore
15、wordiv Introduction v 1 Scope 1 2 Normative references . 1 3 Apparatus 1 4 Materials. 3 5 Sampling 3 6 Test panels 3 7 Procedure 3 8 Evaluation 4 9 Precision 4 10 Test report . 4 Annex A (normative) Monitoring and calibration of the washing equipment 6 Bibliography . 8 BS ISO 20566:2005 Licensed Cop
16、y: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) iv I SO 5002 All irthgs ersedevr Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
17、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 committee. International organizations, governmental and non-governmental,
18、 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 accordance with the rules given in the ISO/IEC Directives, Part 2. The main t
19、ask 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 approval by at least 75 % of the member bodies casting a vote. Attent
20、ion 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 Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General t
21、est methods for paints and varnishes. It is based on the German standard DIN 55668, Beschichtungsstoffe Prfung der Kratzfestigkeit von Beschichtungen mit einer Laborwaschanlage (Paints and varnishes Determination of scratch resistance of coating systems using a laboratory car wash). BS ISO 20566:200
22、5 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) I SO 5002 All irthgs ersedevr v Introduction With this test procedure, it is important to note that the test results will not, over time, remain constant, as a result of cha
23、nges to the brush material. 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 oper
24、ating hours are not comparable with each other. BS ISO 20566:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank 5002:66502 OSI SB Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c)
25、BSI INTENRATIONAL TSANDADR IS:66502 O5002(E) I SO 5002 All irthgs ersedevr 1 Paints and varnishes Determination of the scratch resistance of a coating system using a laboratory car-wash 1 Scope This International Standard describes a test procedure for assessing the scratch resistance of organic pai
26、nt 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 as close as possible to
27、 the real conditions in a car-wash. 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 referenced document (including any amendments)
28、 applies. ISO 1513, Paints and varnishes Examination and preparation of samples for testing ISO 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85 ISO 4618-1:1998, Paints and varnishes Terms and definitions for coating materials Part 1: General te
29、rms ISO 13803, Paints and varnishes Determination of reflection haze on paint films at 20 ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3 Apparatus The apparatus2) shall comprise the following individual components: 3.1 Washing brush: Diameter 1 000 mm Width 400 mm
30、 Material polyethylene Profile x-shaped, spliced 1) For the term “coating”, see ISO 4618-1:1998. 2) Information on procuring the equipment is available from DIN Deutsches Institut fr Normung e.V., NAB, Burggrafenstrasse 6, 10787 Berlin, Germany. BS ISO 20566:2005 Licensed Copy: sheffieldun sheffield
31、un, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) 2 I SO 5002 All irthgs ersedevr Bristle thickness 0,8 mm Bristle length 440 mm visible Penetration depth 100 mm (see Figure 1) Speed of brush rotation approximately 120 min1, opposite to direction of travel of t
32、est panel holder 3.2 Spray nozzles, made of stainless steel: Spread of jet 60 Water flow rate (2,2 0,1) l/min at (300 50) kPa Each nozzle shall only spray on one side, against the direction of travel of the test panel holder. They shall produce the specified spray pattern (see Annex A). 3.3 Test pan
33、el holder: Feed speed (5 0,2) m/min Pattern of movement see Figure 1 Dimensions in millimetres Key 1 brush 2 spray nozzle 3 test panel holder 4 spray jet (jet strikes brush 50 mm above table) a Penetration depth. Figure 1 Pattern of movement of test panel holder BS ISO 20566:2005 Licensed Copy: shef
34、fieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5002(E) I SO 5002 All irthgs ersedevr 3 4 Materials 4.1 Washing suspension. Prepare a suspension consisting of 1,5 g of silica powder (silica micro-powder having a mean particle size of 24 m)3) per litr
35、e of tap water in a suitable container, mixing it by stirring vigorously. Unless otherwise agreed, the water temperature shall be between 15 C and 28 C. The suspension shall be stirred continuously during the test procedure in such a way that the silica powder does not settle on the bottom of the co
36、ntainer as this would result in variations in the concentration. NOTE The suspension can be reused once the test equipment has come to a standstill. However, it is essential that the suspension is stirred thoroughly again before being reused. 5 Sampling Take a representative sample of the product to
37、 be tested, as described in ISO 15528. Examine and prepare each sample for testing, as described in ISO 1513. If testing a clearcoat, the basecoat shall be a single shade of black. 6 Test panels Panels shall be flat and free of deformations. The substrate and size shall be as agreed between the inte
38、rested parties. The spraying, drying/hardening and stoving parameters and the ageing and conditioning before the test shall be as agreed between the interested parties. 7 Procedure Carry out the test at room temperature (20 C to 30 C), unless otherwise agreed. Determine the parameter to be measured
39、on the coated test panel, e.g. the gloss in accordance with ISO 2813 or haze in accordance with ISO 13803. Perform a trial run without a test panel, carrying out 10 washing operations (10 double passes) as described in Annex A. Set the required pressure and verify it. Position the test panel on the
40、test jig and carry out 10 washing operations (10 double passes) using the to- and-fro pattern of movement shown in Figure 1. Rinse the washed test panel with cold water, then clean it with a suitable solvent, e.g. white spirit, using soft, non-scratching paper tissues and wiping in the direction of
41、the scratches. Finally, leave for 10 min to dry off. This process is designed to remove all residues of silica powder, and any fibres from the brush. If the test equipment is not to be used for some time (more than 8 h), it is recommended that it be rinsed thoroughly, particularly the brushes, with
42、tap water. 3) Information on procuring the silica powder is available from DIN Deutsches Institut fr Normung e.V., NAB, Burggrafenstrasse 6, 10787 Berlin, Germany. BS ISO 20566:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:66502 O5
43、002(E) 4 I SO 5002 All irthgs ersedevr 8 Evaluation Within 2 h of drying, take the final readings of e.g. the gloss in accordance with ISO 2813 or haze in accordance with ISO 13803 of the test panel across the direction of scratching. Only make measurements in homogeneous areas. NOTE If specified, L
44、* at an angle of reflection of 10 may be measured in accordance with ISO 7724-1 1. Calculate the mean of three readings across the entire area of damage on the test panel. From these values, calculate the difference in gloss (or haze), or the percentage change in gloss (or haze), relative to the ini
45、tial readings. A visual assessment can also be made or a digital image produced. Depending on the paint system used, a paint-flow (self-repairing) effect may be more or less evident. The timing of the measurements after washing shall therefore be very carefully defined. It can be informative to repe
46、at the readings after 24 h or after ageing in an oven. 9 Precision 9.1 Repeatability limit r The repeatability limit r is the value below which the absolute difference between two single test results, each the mean of duplicates, can be expected to lie when this method is used under repeatability co
47、nditions, i.e. when the test results are obtained on identical material by one operator in one laboratory within a short interval of time using the standardized test method. For this method, in the case of gloss measurement (reflectometer readings), r is 14 units, with a 95 % probability. 9.2 Reprod
48、ucibility limit R The reproducibility limit R is the value below which the absolute difference between two test results, each the mean of duplicates, can be expected to lie when this test method is used under reproducibility conditions, i.e. when the test results are obtained on identical material b
49、y operators in different laboratories using the standardized test method. For this method, in the case of gloss measurement (reflectometer readings), R is 20 units, with a 95 % probability. 10 Test report The test report shall contain at least the following information: a) all information necessary for the identification of the sample tested (manufacturer, product name, batch number, etc.); b) a reference to this International Stan