1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 1518-2:2011Paints and varnishes Determination of scratch resistancePart 2: Variable-loading method (ISO 1518-2:2011)Incorporating corrigendum November 2011BS EN ISO 151
2、8-2:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 1518-2:2011. It supersedes BS EN ISO 12137-2:2006, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organization
3、s represented on this committee can be obtained 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.ISBN 978 0 580 77326 6ICS 87.040 Compliance with a British Standard cannot confer imm
4、unity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2011.Amendments/corrigenda issued since publicationDate Text affected31 Janury 2012 Implementation of CEN Correction Notice 9 November 2011: Correction o
5、f the supersedingnote in the EN Foreword and title page The British Standards Institution 2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1518-2 October 2011 ICS 87.040 Supersedes EN ISO 12137-2:2006English Version Paints and varnishes - Determination of scratch resistance - Part 2: Var
6、iable-loading method (ISO 1518-2:2011) Peintures et vernis - Dtermination de la rsistance la rayure - Partie 2: Mthode charge variable (ISO 1518-2:2011) Beschichtungsstoffe - Bestimmung der Kratzbestndigkeit -Teil 2: Verfahren mit kontinuierlich ansteigender Last (ISO 1518-2:2011) This European Stan
7、dard 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 status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning
8、 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, German). A version in any other language made by translation under the responsibility of a CEN member into its
9、 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, I
10、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1
11、000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 1518-2:2011: EForeword This document (EN ISO 1518-2:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technic
12、al 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 April 2012, and conflicting national standards shall be with
13、drawn 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 such patent rights. This document supersedes EN ISO 12137-2:2006. Accor
14、ding 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, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
15、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 1518-2:2011 has been approved by CEN as a EN ISO 1518-2:2011 without any modification. BS EN ISO 1518-2:
16、2011 EN ISO 1518-2:2011 (E)iiiForeword ISO (the International 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 interes
17、ted 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 the work. ISO collaborates closely with the International Electrotechnical C
18、ommission (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 International Standards. Draft International Standards adopted by the tech
19、nical 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 the elements of this document may be the subject of patent rights. ISO
20、shall not be held responsible for identifying any or all such patent rights. ISO 1518-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. It cancels and replaces ISO 12137-2:1997, which has been technically revised.
21、 The main changes are the following: a) The number of the standard has been changed from ISO 12137-2 to ISO 1518-2 in order to group the scratch-resistance tests under the same number (ISO 1518). b) A definition of scratch has been introduced. c) The supplementary test conditions (formerly Annex A)
22、have been integrated in the test report. d) The text has been editorially revised and the normative references have been updated. ISO 1518 consists of the following parts, under the general title Paints and varnishes Determination of scratch resistance: g127 Part 1: Constant-loading method g127 Part
23、 2: Variable-loading method BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E) ISO 2011 BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E)INTERNATIONAL STANDARD 1Paints and varnishes Determination of scratch resistance Part 2: Variable-loading method 1 Scope This part of ISO 1518 specifies a method for determin
24、ing, using a pointed stylus loaded with a continuously increasing load, the scratch resistance of a single coating of a paint, varnish or related product, or the upper layer of a multicoat system. This test has been found to be useful in comparing the scratch resistance of different coatings. It is
25、most useful in providing relative ratings for a series of coated panels exhibiting significant differences in scratch resistance. Neither this part of ISO 1518 nor ISO 1518-1 specifies a method using a curved stylus, which is specified in ISO 12137. The choice between the three methods will depend o
26、n the particular practical problem. 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)
27、 applies. ISO 1513, Paints and varnishes Examination and preparation of test samples ISO 1514, Paints and varnishes Standard panels for 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
28、definitions For the purposes of this document, the following terms and definitions apply. 3.1 scratch, n cut or gouge through the surface of a coating, made by contact with a sharp object 4 Principle The product or system under test is applied at uniform thickness to flat panels of uniform surface t
29、exture. After drying/curing, the scratch resistance is determined using an automatic instrument which pushes the panels beneath a pointed stylus mounted so that it presses down perpendicularly on the surface of the test panel. The load on the test panel is increased continuously until the coating is
30、 scratched. EN ISO 1518-2:2011 (E)BS EN ISO 1518-2:2011 ISO 2011 2 5 Apparatus 5.1 Instrument for determining scratch resistance. A suitable instrument1)is shown in Figure 1. It consists principally of a counterbalanced beam with, mounted at one end, a pointed stylus. The test panel is placed on a s
31、liding table which is motor-driven to move under the stylus at a speed of 10 mm/s. A continuous-loading weight mounted over the beam acts on the beam in such a way that, as the test panel passes under the stylus, the load on the stylus is continuously increased. The stylus-loading range can be varie
32、d by changing the continuous-loading weight (weights giving loading ranges of 0 g to 50 g, 0 g to 100 g and 0 g to 200 g are available, for instance). Mounted over the stylus itself is a small scale pan on which weights can be placed to expand the stylus-loading range (adding a weight of 100 g, for
33、instance, changes a 0 g to 200 g loading range to one of 100 g to 300 g). 1) This apparatus is available from Shinto Scientific Co., Ltd, 27 Kanda-higashikonyacho, Chiyoda-ku, Tokyo 101-0034, Japan. This information is given for the convenience of users of this part of ISO 1518 and does not constitu
34、te endorsement by ISO of the apparatus shown. Other types of scratch tester may be used if they can be shown to give similar relative ratings. BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E) ISO 2011 3Key 1 cylindrical counterweight 2 continuous-loading weight 3 scale pan 4 sliding table 5 stylus Figur
35、e 1 Scratch instrument with pointed stylus 5.2 Stylus, preferably tipped with a conical sapphire or diamond, the point of which is rounded to a radius of (0,03 g114 0,005) mm (see Figure 2). BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E) ISO 2011 4 Dimensions in millimetres Key 1 conical sapphire or d
36、iamond 2 stylus Figure 2 Stylus tipped with conical sapphire or diamond 5.3 Microscope, preferably with a magnification range extending up to g117 100, required to examine the stylus. It may also be used to inspect the scratched coating. 6 Sampling Take a representative sample of the product to be t
37、ested (or of each product in the case of a multicoat system), as specified in ISO 15528. Examine and prepare each sample for testing, as specified in ISO 1513. 7 Test panels 7.1 Substrate Select the substrate from one of those specified in ISO 1514 and, where possible, in accordance with the desired
38、 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 product or system
39、 under test. BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E) ISO 2011 57.3 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 g114 2) C and a r
40、elative humidity of (50 g114 5) % for a minimum period 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 t
41、hickness, in micrometres, of the dried coating by one of the procedures specified in ISO 2808. 8 Procedure 8.1 Test conditions Carry out the test at (23 g114 2) C and a relative humidity of (50 g114 5) %. 8.2 Preparation for the test Place the instrument on a stable and level surface. Level the inst
42、rument in accordance with the manufacturers instructions. Examine the stylus under the microscope, preferably at a magnification of g117 100, in accordance with the instrument operation manual, to ensure that it is undamaged. Clean the stylus, if necessary, with a clean cloth or lint-free paper. 8.3
43、 Determination Place a test panel up against the stop on the sliding table. Secure the panel in place by turning the securing screws evenly about one turn at a time. Secure the stylus in the vertical position. Adjust the counterweights so that, when the tip of the stylus is just touching the surface
44、 of the test panel, the load on the stylus is zero. Adjust the height of the stylus to the thickness of the test panel, with the beam released and the stylus resting on the test panel. Load the stylus at the lowest weight range to be tested, e.g. 0 g to 50 g. Start the instrument at a rate of about
45、10 mm/s. The instrument shown in Figure 1 will stop automatically when the sliding table has moved 100 mm. Inspect the coating for scratching under a suitable magnification or with the naked eye. BS EN ISO 1518-2:2011 EN ISO 1518-2:2011 (E) ISO 2011 6 If no scratching occurs, increase the stylus-loa
46、ding range, e.g. 0 g to 100 g, and continue in test areas that do not overlap until scratching does occur. When scratching has occurred, determine which type of defect is involved. The defects are defined as follows: a) Plastic deformation: the permanent indentation of the surface with or without an
47、y 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 surface. c) Surface scratch: a continuous cut or gouge through the surface. d) Cohesive fracture: the presence of a vis
48、ible surface break or rupture. e) Combinations of the above. NOTE In some cases, one of these types of defect might be of particular importance. Repeat the determination at least twice (i.e. for a total of at least three determinations) on the same panel at the stylus-loading range at which scratching occurs. For each of the determinations, measure the distance d, in mil
