1、BSI Standards PublicationBS EN ISO 7784-1:2016Paints and varnishes Determination of resistance toabrasionPart 1: Method with abrasive-paper coveredwheels and rotating test specimenBS EN ISO 7784-1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO7784-1:20
2、16. It supersedes BS EN ISO 7784-1:2006 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/10, Test methods for paints.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to
3、include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 79676 0ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7784-1 April 2016 ICS 87.040 Supersedes EN ISO 7784-1:2006E
5、nglish Version Paints and varnishes - Determination of resistance to abrasion - Part 1: Method with abrasive-paper covered wheels and rotating test specimen (ISO 7784-1:2016) Peintures et vernis - Dtermination de la rsistance labrasion - Partie 1: Mthode utilisant des roues revtues de papier abrasif
6、 et une prouvette rotative (ISO 7784-1:2016) Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil 1: Verfahren mit schleifpapierbelegten Rdern und rotierender Probe (ISO 7784-1:2016) This European Standard was approved by CEN on 27 February 2016. CEN members are bound to comply with the CE
7、N/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-CENELEC Management Ce
8、ntre 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 the same status as t
9、he 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, Luxembourg, Malta, Nethe
10、rlands, 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-1000 Brussels 2016 CEN All righ
11、ts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7784-1:2016 EBS EN ISO 7784-1:2016EN ISO 7784-1:2016 (E) 3 European foreword This document (EN ISO 7784-1:2016) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in co
12、llaboration 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 October 2016, and conflicting nation
13、al standards shall be withdrawn at the latest by October 2016. 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 supersede
14、s EN ISO 7784-1:2006. 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
15、Macedonia, 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 7784-1:2016 has been approved
16、by CEN as EN ISO 7784-1:2016 without any modification. BS EN ISO 7784-1:2016ISO 7784-1:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Apparatus and materials 26 Test specimens 46.1 Preparation of the test specimens 46.2 Film thickness 46.
17、3 Conditioning 47 Procedure. 47.1 Agreements 47.2 Preparation of the abrasive wheels . 57.3 Test conditions 57.4 Number of determinations . 57.5 Test procedure . 58 Evaluation 69 Precision . 610 Test report . 6Bibliography 7 ISO 2016 All rights reserved iiiContents PageBS EN ISO 7784-1:2016ISO 7784-
18、1:2016(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 w
19、hich 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 Commission (IEC) on all
20、 matters 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. Thi
21、s document 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
22、all such 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 a
23、nd does 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 i
24、nformationThe 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 7784-1:1997), which has been technically revised with the following changes:a) th
25、e title has been changed;b) the terms and definitions clause has been amended;c) a 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 ha
26、s been 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 abrasi
27、ve-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 specimeniv ISO 2016 All rights reservedBS EN ISO 7784-1:2016ISO 7784-1:2016(E)IntroductionThis par
28、t of ISO 7784 is one of 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 specim
29、en movementType Degree of 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
30、 stroke so that a new area 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. ISO 2016 All rights reserved vBS EN ISO 7784-1:2016BS EN ISO 7784-1:2016Paints and varnishes Determination of resistance to abrasion
31、 Part 1: Method with abrasive-paper covered wheels and rotating test specimen1 ScopeThis part of ISO 7784 specifies a method for determining the resistance to abrasion of coatings, for which two loaded, freely rotatable but eccentrically arranged abrasive-paper covered wheels affect the coating of t
32、he rotating test specimens.2 Normative referencesThe following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the ref
33、erenced 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 and their raw materials Temperatures and humidities for conditioning and testingISO 4618, Paints
34、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 thermoplastic Determination of indentation hardness Part 2: IRHD pocket meter methodFEPA-Standard 43-1,
35、Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives Macrogrits P 12 to P 2201)FEPA-Standard 43-2, Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives Microgrits P 240 to P 25001)3 Terms and definitionsFor t
36、he purposes of this document, the terms and definitions 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 Abras
37、ives.INTERNATIONAL STANDARD ISO 7784-1:2016(E) ISO 2016 All rights reserved 1BS EN ISO 7784-1:2016ISO 7784-1:2016(E)4 PrincipleTwo pivot-mounted rubber wheels, covered with agreed abrasive paper, are pressed onto the coating of the rotating test specimen applying the agreed test load. The eccentric
38、arrangement of the axes of the abrasive wheels relative to the axis of rotation causes a crosswise abrasive wear in a ring-shaped zone. 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
39、 specimen3 wear zone4 abrasive wheelsFigure 1 Principle of the abrasion test with rotating test specimen5 Apparatus and materials5.1 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
40、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 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 the
41、y can rotate with low friction.5.1.3 It shall be ensured that in lowered condition, the positions of the abrasive wheels relative to 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 t
42、est.2 ISO 2016 All rights reservedBS EN ISO 7784-1:2016ISO 7784-1:2016(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 wheel)aOffset (19,0 0,5) mm.Fig
43、ure 2 Schematic diagram of the turntable abrasion tester5.2 Abrasive wheel, consisting of the rubber wheel (5.2.1) on which the abrasive paper (5.2.2) is adhered. Two abrasive wheels are required for the test.5.2.1 Rubber wheel, cylindrical rubber disk equipped with an axial bore hole for attachment
44、 on the supported mandrel on the arm of the apparatus (see 5.1.2). The diameter of the rubber wheel shall be (50,5 0,5) mm and the thickness (12,7 0,2) mm.The hardness of the elastomer material (in Shore A in accordance with ISO 7619-1 or in IRHD in accordance with ISO 7619-2) shall be agreed.NOTE I
45、t is common to agree on the rubber wheel on the basis of the identification of the abrasive wheel manufacturer. ISO 2016 All rights reserved 3BS EN ISO 7784-1:2016ISO 7784-1:2016(E)5.2.2 Abrasive paper, with agreed abrasive material and agreed grain size in accordance with FEPA Standard 43-1 or FEPA
46、 Standard 43-2, self-adhesive, and in strips with a width of (12,7 0,2) mm, as well as a minimum length of 160 mm.If no self-adhesive abrasive paper is available, regular abrasive paper may be used together with double-sided adhesive tape.In case the strips of abrasive paper are cut at an angle (45)
47、 prior to adhering (see Figure 3), a minimum length of 173 mm is required.NOTE It is common to agree on the abrasive paper on the basis of the identification of the abrasive wheel manufacturer.5.3 Weights, to increase the test load up to about 10 N by attaching to each arm (see 5.1.2).NOTE For a com
48、mon apparatus, the minimum test load which is exerted solely by the abrasive wheel and the arms without additional weights is 2,7 N and with the weights, the test load values 5,2 N and 10,1 N are additionally available for each abrasive wheel.5.4 Balance, with an accuracy of 0,1 mg.6 Test specimens6
49、.1 Preparation of the test specimensThe test specimens shall be plane, have the minimum dimensions of 100 mm 100 mm, and be prepared, coated, and dried/hardened in accordance with ISO 1514.For the mentioned dimensions of the test specimen, the minimum distance between wear zone and edge of the test specimen shall be about 7 mm (see Figure 2).For a common apparatus, the test specimen is fixed on the turntable by means of an axial screw. For this, the test specimen shall have a bore hole in the centre.6.2 Fil
