1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 2812-3:2012Paints and varnishes Determination of resistance toliquidsPart 3: Method using an absorbent medium(ISO 2812-3:2012)BS EN ISO 2812-3:2012 BRITISH STANDARDNati
2、onal forewordThis British Standard is the UK implementation of EN ISO2812-3:2012. It supersedes BS EN ISO 2812-3:2007 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 ca
3、n beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 71913 4ICS 87.040Compliance
4、with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2
5、812-3 July 2012 ICS 87.040 Supersedes EN ISO 2812-3:2007English Version Paints and varnishes - Determination of resistance to liquids - Part 3: Method using an absorbent medium (ISO 2812-3:2012)Peintures et vernis - Dtermination de la rsistance aux liquides - Partie 3: Mthode utilisant un milieu abs
6、orbant (ISO 2812-3:2012) Beschichtungsstoffe - Bestimmung der Bestndigkeit gegen Flssigkeiten - Teil 3: Verfahren mit einem saugfhigem Material (ISO 2812-3:2012) This European Standard was approved by CEN on 20 June 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whic
7、h 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 Centre or to any CEN member. This Eur
8、opean 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 the official versions. CEN members a
9、re 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, Netherlands, Norway, Poland, Portugal, R
10、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any mean
11、s reserved worldwide for CEN national Members. Ref. No. EN ISO 2812-3:2012: EBS EN ISO 2812-3:2012EN ISO 2812-3:2012 (E) 3 Foreword This document (EN ISO 2812-3:2012) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paint
12、s 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 January 2013, and conflicting national standards shall be withdrawn at the latest by Janua
13、ry 2013. 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 2812-3:2007. According to the CEN/CENELEC Int
14、ernal 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 Macedonia, France, Germany, Greece, Hungary, Iceland,
15、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 2812-3:2012 has been approved by CEN as a EN ISO 2812-3:2012 without any modification. BS EN
16、 ISO 2812-3:2012ISO 2812-3:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references . 13 Principle . 14 Apparatus and materials . 15 Test substances . 26 Sampling 27 Test panels 27.1 Substrate . 27.2 Preparation and coating 27.3 Coating thickness . 28 Procedure
17、 28.1 Conditioning of the test panels . 28.2 Test conditions . 28.3 Determination . 29 Evaluation 310 Precision 311 Test report . 3Annex A (informative) Examples of test substances 5Bibliography . 7BS EN ISO 2812-3:2012ISO 2812-3:2012(E)ForewordISO (the International Organization for Standardization
18、) 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 technical committee has been established has the right to be repr
19、esented 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 matters of electrotechnical standardization.International Standards are
20、 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 technical committees are circulated to the member bodies for voting. Publication as an International
21、 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 shall not be held responsible for identifying any or all such patent rights.ISO 2812-3 was prepar
22、ed by Technical Committee 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 2812-3:2007), which has been technically revised. The main changes are the following: the use of filter paper wi
23、th a diameter of 36 mm is now permitted (see 4.4); depth filter sheets and laboratory filter paper have been included as examples of suitable types of filter paper.ISO 2812 consists of the following parts, under the general title Paints and varnishes Determination of resistance to liquids: Part 1: I
24、mmersion in liquids other than water Part 2: Water immersion method Part 3: Method using an absorbent medium Part 4: Spotting methods Part 5: Temperature-gradient oven methodiv ISO 2012 All rights reservedBS EN ISO 2812-3:2012INTERNATIONAL STANDARD ISO 2812-3:2012(E)Paints and varnishes Determinatio
25、n of resistance to liquidsPart 3: Method using an absorbent medium1 ScopeThis part of ISO 2812 specifies a method, using an absorbent medium, for determining the resistance of an individual-layer or multi-layer system of coating materials to the effects of liquids or paste-like products.This method
26、enables the tester to determine the effects of the test substance on the coating and, if necessary, to assess the damage to the substrate.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl
27、ies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thick
28、nessISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation systemISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designat
29、ion of quantity and size of defects, and of intensity of uniform changes in appearance Part 2: Assessment of degree of blisteringISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling3 PrincipleA coated test panel is exposed to one or more test substances by using an absorb
30、ent medium. The effects of the exposure are assessed in accordance with agreed criteria.4 Apparatus and materialsOrdinary laboratory equipment and the following:4.1 Heating cabinet, with artificial ventilation, for carrying out the test at temperatures up to 40 C and capable of maintaining the tempe
31、rature to within 3 C.WARNING To protect against explosion or fire, products containing volatile flammable substances should be handled with care. National regulations should be followed.4.2 Watch glasses, with a diameter of approximately 40 mm, curved in such a way that, when placed over a test area
32、 (see 8.3), the watch glass will not touch the filter paper or cotton wool swab, impregnated with the test liquid, on the test area.4.3 Petri dishes, with 60 mm diameter and 20 mm rim. ISO 2012 All rights reserved 1BS EN ISO 2812-3:2012ISO 2812-3:2012(E)4.4 Filter paper, of a type that will not be a
33、ffected by the test substance used, with a diameter of approximately 25 mm or 36 mm.NOTE 1 So-called depth filter sheets (e.g. those used for polishing automotive paint coatings in laboratory testing) have been found suitable for this test. These sheets consist of a cellulose matrix containing a mix
34、ture of very fine kieselguhr and perlite particles as the filtration-active substances.NOTE 2 For most purposes, laboratory filter paper with a thickness of 1,0 mm to 1,25 mm will be suitable.4.5 Cotton wool, lint-free and of a type that will not be affected by the test substance used. Cotton wool m
35、ay be used instead of filter paper (4.4) for the test and for cleaning the test panel at the end of the test period (see Clause 9).5 Test substancesOne or more test substances, as agreed between interested parties, shall be used. Examples of test substances are given in Annex A.6 SamplingTake a repr
36、esentative sample of the coating material to be tested, as described in ISO 15528.Examine and prepare the sample for testing, as described in ISO 1513.7 Test panels7.1 SubstrateUnless otherwise agreed, use test panels conforming to the requirements of ISO 1514, with dimensions of approximately 150 m
37、m 100 mm and a thickness of 0,7 mm to 1,0 mm.7.2 Preparation and coatingPrepare each test panel as described in ISO 1514 and then coat it by the agreed method with the product or system under test. Dry (or stove) and age (if applicable) each coated test panel for the specified time under the specifi
38、ed conditions.7.3 Coating thicknessDetermine the dry-film thickness of the coating, in micrometres, using one of the non-destructive methods given in ISO 2808.8 Procedure8.1 Conditioning of the test panelsImmediately before testing, condition the test panels for at least 16 h under standard conditio
39、ns as specified in ISO 3270, i.e. (23 2) C and (50 5) % relative humidity.8.2 Test conditionsUnless otherwise specified, carry out the test at the standard temperature specified in ISO 3270, i.e. (23 2) C.8.3 DeterminationPerform the test in duplicate.2 ISO 2012 All rights reservedBS EN ISO 2812-3:2
40、012ISO 2812-3:2012(E)Place the test panel horizontally. When using liquid test substances, dip a filter paper or cotton wool swab into one of the test liquids and wait until the filter paper or cotton wool is thoroughly impregnated with the liquid. Take the filter paper or cotton wool swab out of th
41、e liquid and let excess liquid run off. Do not compress the filter paper or cotton wool to remove excess liquid. Place the filter paper or cotton wool swab on the test panel.Repeat this procedure for each test liquid, making sure that the filter papers or cotton wool swabs do not touch one another a
42、nd that the distance between the filter papers or cotton wool swabs and the edges of the panel is at least 10 mm. Then immediately cover the test areas with watch glasses or Petri dishes.When using highly viscous or paste-like test substances, apply about 0,5 cm3of each substance to the test panel,
43、place a filter paper or cotton wool swab over the substance and cover the test areas with Petri dishes.The test duration shall be agreed between the interested parties and should reflect the end use of the coating.When the test is performed at elevated temperatures, apply the agreed test substances
44、and place the test panel in a heating cabinet for the agreed test period.9 EvaluationAt the end of the test period, remove the filter papers or cotton wool swabs and wipe the test panel with dry cotton wool. Clean off any dried residue of aqueous test substances under running water, and clean off an
45、y dried residue of other test substances with a solvent that does not attack the coating.Immediately assess the test panel for blistering, as specified in ISO 4628-2, relative to the non-exposed areas of the panel. Evaluate only the areas which have been in direct contact with a test substance. Rate
46、 any visible changes as specified in ISO 4628-1.Unless otherwise agreed, reassess the exposed areas after 24 h.Further tests on the exposed and non-exposed areas of the test panel may be performed (e.g. a cross-cut test or hardness test) to determine the changes resulting from the effects of the tes
47、t substances.If the substrate, i.e. the surface of the test panel, is to be examined for visible changes, remove the coating in conformity with the specified procedure.If the results of the evaluation of the duplicate determinations differ significantly, repeat the test, again in duplicate.Report th
48、e results of all determinations, including any repeat determinations.10 PrecisionNo details are currently available for the repeatability limit (r) and reproducibility limit (R).11 Test reportThe test report shall contain at least the following information:a) all information necessary for identifica
49、tion of the sample tested, including the manufacturer, trade name, batch number, etc.;b) a reference to this part of ISO 2812 (ISO 2812-3:2012);c) details of the test panels, including:1) the material (including thickness) and surface pretreatment of the substrate,2) the method used to coat the substrate with the sample under test, including the drying time and drying conditions for all layers and, where applicable, the conditions of any ageing carried out before the test, ISO 2012 All rights reserved 3BS EN ISO
