1、January 2012 Translation by DIN-Sprachendienst.English price group 8No 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!$y-Z“1861055www.din.deDDIN EN ISO 12137Paints and varnishes Determination of mar resistance (ISO 12137:2011)English translation of DIN EN ISO 12137:2012-01Beschichtungsstoffe Bestimmung der Bestndigkeit gegen Verkratzen (ISO 12137:2011)Englische bersetzung von DIN EN ISO 12137:2012-01Peintur
3、es et vernis Dtermination de la rsistance la dtrioration (ISO 12137:2011)Traduction anglaise de DIN EN ISO 12137:2012-01SupersedesDIN EN ISO 12137-1:2006-09www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1201.12 DIN EN ISO 12137:20
4、12-01 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secretariat: BSI, United Kingdom) in collaboration with Technical Committee CEN
5、/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 Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschi
6、chtungsstoffe und Beschichtungen. The DIN Standards corresponding to the International Standards referred to in the EN are as follows: ISO 1513 DIN EN ISO 1513 ISO 1514 DIN EN ISO 1514 ISO 1518-1 DIN EN ISO 1518-1 ISO 1518-2 DIN EN ISO 1518-2 ISO 2808 DIN EN ISO 2808 ISO 15528 DIN EN ISO 15528 Amend
7、ments This standard differs from DIN EN ISO 12137:2006-09 as follows: a) a definition of “mar” has been included (3.1); b) the supplementary test conditions (formerly Annex A) have been integrated in the test report; c) the standard has been editorially revised and normative references have been upd
8、ated. Previous editions DIN EN ISO 12137-1: 2006-09 National Annex NA (informative) Bibliography DIN 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 1518-1, Paints and varnishes Determination o
9、f scratch resistance Part 1: Constant-loading method DIN EN ISO 1518-2, Paints and varnishes Determination of scratch resistance Part 2: Variable-loading method DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 15528, Paints, varnishes and raw materials for paints and
10、varnishes Sampling EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12137 October 2011 ICS 87.040 Supersedes EN ISO 12137-2:2006English Version Paints and varnishes - Determination of mar resistance (ISO 12137:2011) Peintures et vernis - Dtermination de la rsistance la dtrioration (ISO 12137
11、:2011) Beschichtungsstoffe - Bestimmung der Bestndigkeit gegen Verkratzen (ISO 12137:2011) This European Standard was approved by CEN on 14 October 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
12、tus 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 Standard exists in three official versions (English, French, G
13、erman). 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 national standards bodies of Austria, Belgium, Bulgaria, Croa
14、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDI
15、ZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12137:2011: EContents Page Foreword 3 1 Scope 4 2 No
16、rmative references 4 3 Terms and definitions .4 4 Principle 4 5 Apparatus .5 6 Sampling .6 7 Test panels .7 8 Procedure .7 9 Precision .8 10 Test report 8 Bibliography . 10 EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 2 Foreword This document (EN ISO 12137:2011) has been prepared by Technical Comm
17、ittee 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 identical text or by endorsement, at the la
18、test by April 2012, and conflicting national standards shall be withdrawn at the latest by April 2012. 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 suc
19、h patent rights. This document supersedes EN ISO 12137-2:2006. 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, Cyprus, Czech Republic, Denmark, Eston
20、ia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 12137:2011 has been approved by CEN
21、as a EN ISO 12137:2011 without any modification. EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 3 1 Scope This International Standard specifies a method for determining, using a curved (loop-shaped or ring-shaped) stylus, the mar resistance of a single coating of a paint, varnish or related product,
22、 or the upper layer of a multicoat system. This test has been found to be useful in comparing the mar resistance of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in mar resistance. This International Standard does
23、 not specify a method using a pointed stylus, two of which are specified in ISO 1518-1 and ISO 1518-2, respectively. The choice between the three methods will depend on the particular practical problem. 2 Normative references The following referenced documents are indispensable for the application o
24、f this document. 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 test samples ISO 1514, Paints and varnishes Standard panels f
25、or testing ISO 2808, Paints and varnishes Determination of film thickness ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 mar, n blemish on the surface of a coat
26、ing, 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 areas 4 Principle The product or system under test is applied at uniform thickness to flat panels o
27、f uniform surface texture. After drying/curing, the mar resistance is determined by pushing the panels beneath a curved (loop-shaped or ring-shaped) stylus which is mounted so that it presses down on the surface of the test panel at an angle of 45. The load on the test panel is increased in steps un
28、til the coating is marred. EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 4 5 Apparatus 5.1 Instrument for determining mar resistance. A suitable instrument is shown in Figure 1. It consists principally of a counterbalanced beam with a small scale pan on which weights can be placed to load the stylu
29、s. The stylus is mounted at the lower end of a rod which extends down from the beam at a fixed angle of 45. The test panel is placed on a sliding table which can be pushed under the stylus, preferably by the use of mechanical equipment. The instrument shall be designed so that tests can be performed
30、 with stylus loadings of up to 5 kg and so that the load can be increased or decreased in steps of 0,5 kg, or in steps of 0,25 kg or 0,1 kg when greater accuracy is required near the mar point. Key 1 counterweight 4 beam release 2 main bearing support 5 weight 3 level indicator 6 direction of test O
31、ther types of mar instrument may be used if they give similar relative ratings. For instance, the scratch apparatus specified in ISO 1518-1 is suitable with some modifications. Figure 1 Balanced-beam mar-resistance instrument EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 5 5.2 Loop-shaped or ring-s
32、haped stylus. The loop-shaped stylus shall be made of chromium-plated steel and shall be in the form of a rod of 1,6 mm diameter bent into a “U” shape with an outside radius of (3,25 0,05) mm see Figure 2 a). In each case, the stylus shall be hardened to Rockwell HRC56 to HRC58 and its surface shall
33、 be smooth (roughness 0,05 m). 5.3 Microscope, preferably with a magnification range extending up to 50. Dimensions in millimetres a) Loop-shaped stylus b) Ring-shaped stylus Figure 2 Details of styluses 6 Sampling Take a representative sample of the product to be tested (or of each product in the c
34、ase of a multicoat system), as specified in ISO 15528. Examine and prepare each sample for testing, as specified in ISO 1513. EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 6 7 Test panels 7.1 Substrate Select the substrate from one of those specified in ISO 1514 and, where possible, in accordance w
35、ith the desired practical application. The panels shall be plane and free from distortion, with a maximum thickness of about 12 mm, and 100 mm to 400 mm wide and long. 7.2 Preparation and coating Prepare each test panel in accordance with ISO 1514 and then coat it by the specified method with the pr
36、oduct or system under test. 7.3 Drying and conditioning Dry (or stove) and age, if applicable, each coated test panel according to the instructions given for the product or system under test. Before testing, condition the coated panels at (23 2) C and a relative humidity of (50 5) % for a minimum pe
37、riod of 16 h. The coated panels shall be stored and handled so as to avoid contamination by fingerprints and dust. NOTE Fingerprints, dust or other contamination on the surface will result in a lower accuracy. 7.4 Thickness of coating Determine the thickness, in micrometres, of the dried coating by
38、one of the procedures specified in ISO 2808. 8 Procedure 8.1 Test conditions Carry out the test at (23 2) C and a relative humidity of (50 5) %, unless otherwise agreed. 8.2 Preparation for the test Ensure that the instrument is level, and place it so that the end with the weight pan is nearest the
39、operator. In the case of the instrument shown in Figure 1, the beam release switch will now be on the operators right. Insert the stylus in the holder and tighten the clamping screw. Both sides of the loop-shaped stylus can be used. Examine the stylus periodically to ensure that it has a smooth surf
40、ace without any scratches. If the contacting surface is worn, turn the loop over. When both sides are worn, replace the loop by a new one. If the ring-shaped stylus is used, examine it periodically in the same way and, when the contact point is worn, rotate it so that an unworn area is in contact wi
41、th the panel. When all the ring is worn, replace it by a new one. Adjust the main bearing support so that the beam is balanced in the horizontal plane when the stylus is just touching the panel surface. The alignment of the beam shall be such that the middle of the stylus is over the centreline of t
42、he sliding table. Raise the beam and lock it in the raised position. Clean the stylus, if necessary, with a clean cloth or lint-free paper. EN ISO 12137:2011 (E) DIN EN ISO 12137:2012-01 7 8.3 Determination Place a test panel up against the stop on the sliding table. Place a weight on the scale pan,
43、 starting at a weight somewhat less than that expected to cause marring of the paint surface. Release the beam slowly and carefully (it is very important to carry out this operation with great care). Immediately after the stylus has come to rest on the coating, push the sliding table towards the far
44、 end of the instrument (i.e. away from the operator) at a rate of about 3 mm/s to 6 mm/s for a distance of 75 mm at least. Inspect the coating for marring under a suitable magnification or with the naked eye. If no marring occurs with the initial load, continue the test, using larger loads, in test
45、areas that do not overlap, increasing the load in 0,5 kg increments until marring does occur. If marring occurs with the initial load, continue the test using smaller loads, decreasing the load in 0,5 kg decrements until the coating is no longer marred. Determine which type of defect is involved. Th
46、e defects are defined as follows: a) Plastic deformation: the permanent indentation of the surface with or without any surface blemish or cohesive fracture. b) Surface blemish: a superficial surface effect caused by a difference in the scattering of light between the line of test and the adjacent su
47、rface. c) Surface scratch: a continuous cut or gouge through the surface. d) Cohesive fracture: a visible surface break or rupture. e) Combinations of the above. NOTE In some cases, one of these types of defect might be of particular importance. When the critical load (that at which marring just occ
48、urs) has been approximately located, repeat the test five times at each of the following three loadings: 0,5 kg above the critical load, 0,5 kg below the critical load and at the critical load. To obtain higher accuracy, smaller increments and decrements may be used (e.g. 0,25 kg or 0,1 kg). For each load at or near the critical load, record the number of times the coating was marred. The minimum load which causes marring is that load at which at least two of the five determinations resulted
