1、December 2016 English price group 10No 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 87.040!%Uy“2595086www.din.deDIN
2、 EN ISO 7784-2Paints and varnishes Determination of resistance to abrasion Part 2: Method with abrasive rubber wheels and rotating test specimen (ISO 77842:2016);English version EN ISO 77842:2016,English translation of DIN EN ISO 7784-2:2016-12Beschichtungsstoffe Bestimmung des Abriebwiderstandes Te
3、il 2: Verfahren mit Reibrdern aus Gummi und rotierender Probe (ISO 77842:2016);Englische Fassung EN ISO 77842:2016,Englische bersetzung von DIN EN ISO 7784-2:2016-12Peintures et vernis Dtermination de la rsistance labrasion Partie 2: Mthode utilisant des roues abrasives en caoutchouc et une prouvett
4、e rotative (ISO 77842:2016);Version anglaise EN ISO 77842:2016,Traduction anglaise de DIN EN ISO 7784-2:2016-12SupersedesDIN EN ISO 77842:200607www.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.1
5、1.16 DIN EN ISO 7784-2:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 7784-2:2016) 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)
6、 in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Committee
7、 NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1514 DIN EN ISO 1514 ISO 2808 DIN EN ISO 2808 ISO 3270 DIN EN 23270 ISO 4618 DIN EN ISO 4618 ISO 7619-1
8、DIN ISO 7619-1 ISO 7619-2 DIN ISO 7619-2 DIN EN ISO 7784 consists of the following parts, under the general title Paints and varnishes Determination of resistance to abrasion: Part 1: Method with abrasive-paper covered wheels and rotating test specimen Part 2: Method with abrasive rubber wheels and
9、rotating test specimen Part 3: Method with abrasive-paper covered wheel and linearly reciprocating test specimen Amendments This standard differs from DIN EN ISO 7784-2:2006-07 as follows: a) the title of the standard has been modified; b) Clause 3 “Terms and definitions” has been included; c) a fig
10、ure illustrating the principle of the method has been included; d) the required supplementary information included in the former Annex A has been integrated in the test report; e) the calibration of the apparatus included in the former Annex B has been deleted; f) the test procedure has been re-arra
11、nged; g) the text has been editorially revised and normative references have been updated. Previous editions DIN EN ISO 7784-2: 2006-07 DIN EN ISO 7784-2:2016-12 3 National Annex NA (informative) Bibliography DIN EN 23270, Paints, varnishes and their raw materials Temperatures and humidities for con
12、ditioning and testing DIN EN ISO 1514, Paints and varnishes Standard panels for testing DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 4618, Paints and varnishes Terms and definitions DIN ISO 7619-1, Rubber, vulcanized or thermoplastic Determination of indentation h
13、ardness Part 1: Durometer method (Shore hardness) DIN ISO 7619-2, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 2: IRHD pocket meter method DIN EN ISO 7784-2:2016-12 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7784-2 Ap
14、ril 2016 ICS 87.040 Supersedes EN ISO 7784-2:2006English Version Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with abrasive rubber wheels and rotating test specimen (ISO 7784-2:2016) Peintures et vernis - Dtermination de la rsistance labrasion - Partie 2: Mthode ut
15、ilisant des roues abrasives en caoutchouc et une prouvette rotative (ISO 7784-2:2016) Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil 2: Verfahren mit Reibrdern aus Gummi und rotierender Probe (ISO 7784-2:2016)This European Standard was approved by CEN on 27 February 2016. CEN members
16、 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 standards may be obtained on application
17、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 notified to the CEN-CENELEC Management
18、 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, Iceland, Ireland, Italy, Latvia, Lit
19、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B
20、-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7784-2:2016 EEuropean foreword 3Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 64 Principle 75 Apparatus and materials 76 Test spec
21、imens 96.1 Preparation of test specimens . 96.2 Film thickness 96.3 Conditioning 97 Procedure. 97.1 Agreements 97.2 Preparation of the abrasive wheels . 97.3 Test conditions . 107.4 Number of determinations 107.5 Test procedure 108 Evaluation . 109 Precision 1010 Test report 11Bibliography . 12Conte
22、nts Page2DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016 (E)Foreword 4European foreword This document (EN ISO 7784-2:2016) 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 he
23、ld 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 October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility
24、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 7784-2:2006. According to the CEN-CENELEC Internal Regulations, the national standards organ
25、izations 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 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
26、Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7784-2:2016 has been approved by CEN as EN ISO 7784-2:2016 without any modification. 3DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016
27、(E)ForewordISO (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 interested in a subject for which a
28、 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 Commission (IEC) on all matte
29、rs of electrotechnical standardization.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 docu
30、ment was drafted in accordance with 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 su
31、ch patent rights. Details of any 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 do
32、es not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary inform
33、ationThe committee 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 7784-2:1997), which has been technically revised with the following changes:a) the tit
34、le has been changed;b) the terms and definitions clause has been amended;c) the figure explaining the principle of the method was amended;d) the supplementary test conditions previously in Annex A have been integrated in the test report;e) the calibration of the apparatus previously in Annex B has b
35、een deleted;f) the test procedure has been re-arranged;g) the text has been editorially revised and the normative references have been updated.ISO 7784 consists of the following parts, under the general title Paints and varnishes Determination of resistance to abrasion: Part 1: Method with abrasive-
36、paper covered wheels and rotating test specimen Part 2: Method with abrasive rubber wheels and rotating test specimen Part 3: Method with abrasive-paper covered wheel and linearly reciprocating test specimen4DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016 (E)IntroductionThis part of ISO 7784 is one of
37、the three parts of ISO 7784 dealing with test methods for the determination of the resistance to abrasion of coatings using abrasive wheels. The characteristics and differences of these methods are summarized in Table 1.Table 1 Types of methodStandardAbrasive wheelTest specimen movementType Degree o
38、f freedomISO 7784-1Abrasive paper on rubber wheelFreely rotatable RotationISO 7784-2 Abrasive rubber wheelISO 7784-3Abrasive paper on metal wheelRigid with stroke-dependent rotationaLinear reciprocationaA mechanism rotates the abrasive wheel by a small angle after each double stroke so that a new ar
39、ea of the abrasive paper is effective.The methods using abrasive-paper covered wheels (ISO 7784-1 and ISO 7784-3) are preferably to be applied.5DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016 (E)1 ScopeThis part of ISO 7784 specifies a method for determining the resistance to abrasion of coatings, for
40、which two loaded, freely rotatable but eccentrically arranged abrasive rubber wheels affect the coating of the rotating test specimen.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated r
41、eferences, only the edition cited applies. For undated references, the latest edition of the referenced 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 a
42、nd their raw materials Temperatures and humidities for conditioning and testingISO 4618, Paints and varnishes Terms and definitionsISO 7619-1, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness)ISO 7619-2, Rubber, vulcanized or thermopl
43、astic Determination of indentation hardness Part 2: IRHD pocket meter methodFEPA-Standard 43-1, Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives Macrogrits P 12 to P 2201)3 Terms and definitionsFor the purposes of this document, the terms and definit
44、ions given in ISO 4618 and the following apply.3.1test specimenspecimen on which the test is to be carried out3.2abrasive wearwear, occurring due to laminar removal of coating material on the surface1) FEPA: Federation of European Producers of Abrasives.6DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016
45、(E)4 PrincipleTwo agreed, pivot-mounted abrasive rubber wheels are pressed onto the coating of the rotating test specimen applying the agreed test load. The eccentric arrangement of the axes of the abrasive wheels relative to the axis of rotation causes a crosswise abrasive wear in a ring-shaped zon
46、e. The loss of mass of the coating caused by abrasive wear after the agreed number of cycles is determined.Figure 1 illustrates the test principle.Key1 turntable2 test specimen3 wear zone4 abrasive wheelsFigure 1 Principle of the abrasion test with rotating test specimen5 Apparatus and materials5.1
47、Turntable abrasion tester, as exemplified in Figure 2, with the following properties.5.1.1 The rotational speed of the turntable onto which the test specimen is fixed shall be (60 2) min1. The number of cycles is pre-set on an operation counter.5.1.2 Two arms are attached to the device, each with a
48、mandrel, onto which the abrasive wheels (5.2) and, if necessary, the weights (5.3) are attached. Ball bearings are used for the mandrels for the abrasive wheels so they can rotate with low friction.5.1.3 It shall be ensured that in lowered condition, the positions of the abrasive wheels relative to
49、the axis of rotation comply with the dimensions indicated in Figure 2.5.1.4 A suction device shall be available in order to remove abrasive dust generated during the test.7DIN EN ISO 7784-2:2016-12 EN ISO 7784-2:2016 (E)Dimensions in millimetresKey1 abrasive wheels2 turntable3 test specimen4 wear zone (about 10 mm wide)5 vacuum nozzles6 rotating direction7 axis of rotation (turntable)8 axis of rotation (abrasive
