1、BRITISH STANDARDBS EN ISO 2812-4:2007Paints and varnishes Determination of resistance to liquids Part 4: Spotting methodsThe European Standard EN ISO 2812-4:2007 has the status of a British StandardICS 87.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50
2、g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 2812-4:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50474 7National forewordThis
3、 British Standard was published by BSI. It is the UK implementation of EN ISO 2812-4:2007. This standard, together with BS EN ISO 2812-1:2007 and BS EN ISO 2812-3:2007, supersedes BS EN ISO 2812-1:1995, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee S
4、TI/10, Test methods for paints.A list of organizations represented on STI/10 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.Compliance with a British Standard canno
5、t confer immunity from legal obligations. Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2812-4January 2007ICS 87.040English VersionPaints and varnishes - Determination of resistance to liquids -Part 4: Spotting methods (ISO 2812-4:2007
6、)Peintures et vernis - Dtermination de la rsistance auxliquides - Partie 4: Mthodes la tache (ISO 2812-4:2007)Beschichtungsstoffe - Bestimmung der Bestndigkeitgegen Flssigkeiten - Teil 4: Tropf-/Fleckverfahren (ISO2812-4:2007)This European Standard was approved by CEN on 23 December 2006.CEN members
7、 are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to
8、 the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
9、 status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romani
10、a, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworld
11、wide for CEN national Members.Ref. No. EN ISO 2812-4:2007: EForeword This European Standard shall be given the status of a national standard, either by publication of an identicallatest by July 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follo
12、wingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic,Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,Switzerland and United Kingdom.Endorsement notice The text of ISO 2812-4:2007 has be
13、en approved by CEN as EN ISO 2812-4:2007 without any modifications.This document (EN ISO 2812-4:2007) 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 held by DIN. text o
14、r by endorsement, at the latest by July 2007, and conflicting national standards shall be withdrawn at theLuxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,EN ISO 2812-4:2007Reference numberISO 2812-4:2007(E)INTERNATIONAL STANDARD ISO2812-4First edi
15、tion2007-01-15Paints and varnishes Determination of resistance to liquids Part 4: Spotting methods Peintures et vernis Dtermination de la rsistance aux liquides Partie 4: Mthodes la tache EN ISO 2812-4:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Appara
16、tus 2 5 Test substances 2 6 Sampling 2 7 Test panels 2 8 Procedure 2 9 Evaluation 3 10 Precision 3 11 Test report . 4 Annex A (informative) Examples of test substances 5 Bibliography . 7 EN ISO 2812-4:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation
17、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 represented on that committee. I
18、nternational 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 drafted in accordance with
19、 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 Standard requires approva
20、l 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 2812-4 was prepared by Technical Committe
21、e ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. ISO 2812 consists of the following parts, under the general title Paints and varnishes Determination of resistance to liquids: Part 1: Immersion in liquids other than water Part 2: Water immersion me
22、thod Part 3: Method using an absorbent medium Part 4: Spotting methods Part 5: Temperature-gradient oven method EN ISO 2812-4:20071Paints and varnishes Determination of resistance to liquids Part 4: Spotting methods 1 Scope This part of ISO 2812 specifies spotting methods for determining the resista
23、nce of an individual layer or multi-layer system of coating materials to the effects of liquids or paste-like products. These methods enable the testers to determine the effects of the test substance on the coating and, if necessary, to assess the damage to the substrate. 2 Normative references The
24、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) applies. ISO 1513, Paints and varnishes Examination and prepar
25、ation of samples for testing ISO 1514, Paints and varnishes Standard panels for testing ISO 2808, Paints and varnishes Determination of film thickness ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing ISO 4628-1, Paints and varnishes Eval
26、uation 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 system ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and
27、 of intensity of uniform changes in appearance Part 2: Assessment of degree of blistering ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3 Principle A coated test panel is exposed to a test substance using the spotting method. The effects of the exposures are assess
28、ed in accordance with agreed criteria. EN ISO 2812-4:20072 4 Apparatus Ordinary laboratory equipment and the following apparatus. 4.1 Pipette, suitable for applying approximately 0,1 ml droplets of test substance. 4.2 Burette, 50 ml, for applying test substances. 4.3 Petri dishes with 60 mm diameter
29、 and 20 mm rim. 5 Test substances One or more test substances, as agreed between interested parties, shall be used. Examples of test substances are given in Annex A. 6 Sampling Take a representative sample of the coating material to be tested, in accordance with ISO 15528. Pretest each sample in acc
30、ordance with ISO 1513 and prepare it for further testing (see 7.2). 7 Test panels 7.1 Substrate Unless otherwise agreed, use test panels conforming to the requirements of ISO 1514, with dimensions of approximately 150 mm 100 mm and a thickness of 0,7 mm to 1,0 mm. 7.2 Preparation and coating Prepare
31、 each test panel as described in ISO 1514 and then coat it by the specified application method with the product or system under test. Dry (or stove) and age (if applicable) each coated test panel for the specified time under specified conditions. 7.3 Coating thickness Determine the dry film thicknes
32、s of the coating, in micrometres, using one of the non-destructive methods specified in ISO 2808. 8 Procedure 8.1 Conditioning of the test panels Immediately before testing, condition the test panels for at least 16 h under standard conditions as specified in ISO 3270, i.e. (23 2) C and (50 5) % rel
33、ative humidity. 8.2 Test conditions Carry out the test at the standard temperature specified in ISO 3270, i.e. (23 2) C. EN ISO 2812-4:200738.3 Determination 8.3.1 Method A Horizontal test panel Perform the test in duplicate. Place the test panel horizontally. When using liquid test substances, appl
34、y them to the test panel with a pipette, making sure that the droplets do not touch one another and that the distance to the edges of the panel is at least 12 mm. Then immediately cover the test areas with the Petri dishes. When using highly viscous or paste-like test substances, apply about 0,5 cm3
35、of each substance to the test panel and cover the areas with Petri dishes. The test duration shall be agreed between the interested parties and should reflect the end use of the coating. 8.3.2 Method B Inclined test panel Perform the test in duplicate. Place the test panel in a collecting vessel at
36、an angle of 30 to the horizontal. With the burette, and at intervals of 1 s to 2 s, apply droplets of the liquid test substance to the upper section of the test panel, close to the centre of the panel, over a period of 10 min. The substance will flow down the test panel into the collecting vessel. 9
37、 Evaluation After the test period has expired, wipe the test panel with dry cotton wool. Clean off any dried residue of aqueous test substances under running water, and clean off the dried residue of any other test substances with a solvent that does not attack the coating. Evaluate only the area wh
38、ich has been in direct contact with the test substance. Immediately assess the test panel for blistering as specified in ISO 4628-2 and in comparison with the non-exposed areas of the panel. Rate any visible alterations as specified in ISO 4628-1. Unless otherwise agreed, reassess the exposed areas
39、after 24 h. Further tests on the exposed and non-exposed areas of the test panel may be performed (e.g., cross-cut test, hardness test, etc.) to determine the changes resulting from the effects of the test substances. If the substrate of the test piece is to be examined for visible alterations, remo
40、ve the coating using the specified procedure. If the results of the evaluation of the duplicate determinations differ significantly, repeat the determination, again in duplicate. Report the results of all determinations, including any repeat determinations. 10 Precision No details are currently avai
41、lable for the repeatability limit (r) and reproducibility limit (R). EN ISO 2812-4:20074 11 Test report The test report shall contain at least the following information: a) all information necessary for identification of the coating tested, including the manufacturer, trade name, batch number, etc;
42、b) a reference to this International Standard (ISO 2812-4:2006); c) details of the test panels, including: 1) the material (including thickness) and surface pretreatment of the substrate; 2) the application method for applying the sample coating to the substrate, including the drying time and drying
43、 conditions for all layers; where applicable, ageing conditions before the test; 3) the dry film thickness of the coating, in micrometres, including the measuring method chosen in ISO 2808; d) the method used (A or B), including: 1) the specification of the test substances; 2) the duration of the te
44、st; 3) the temperature; e) result(s) of the assessment, as indicated in Clause 9; f) the name of the person who conducted the test; g) any deviations from the procedure specified; h) any unusual features (anomalies) observed during the test; i) the date of the test. EN ISO 2812-4:20075Annex A (infor
45、mative) Examples of test substances A.1 General A range of fuels and chemicals that are typically used as test substances for automotive coatings is given in A.2, A.3 and A.4. Other test liquids may be used for testing both automotive and other coatings. Use only analytical grade chemicals. A.2 Fuel
46、s and operating fluids for the automotive industry A.2.1 FAM test substance, conforming to the requirements of DIN 51604-1, DIN 51604-2 or DIN 51604-3. A.2.2 Diesel fuel, conforming to the requirements of EN 590. A.2.3 Premium gasoline, conforming to the requirements of EN 228. A.2.4 Bio-diesel, con
47、forming to the requirements of EN 14214. A.2.5 Engine oil. A.2.6 Hypoid gearbox oil. A.2.7 Hydraulic oil. A.2.8 Automatic transmission oil. A.2.9 Brake fluid. A.2.10 Radiator anti-freeze. A.2.11 Body sealing compound. A.2.12 Cavity sealing compound. A.2.13 Windscreen-washer fluid. A.2.14 Cold cleane
48、r. A.3 Laboratory chemicals A.3.1 Ethanol. A.3.2 Isopropanol. A.3.3 Sodium hydroxide solution, with a mass fraction of 5 % sodium hydroxide. A.3.4 Hydrochloric acid solution, with a mass fraction of 10 % hydrochloric acid. EN ISO 2812-4:20076 A.3.5 Sulfurous acid solution, with a mass fraction of 6
49、% sulfurous acid. A.3.6 Sulfuric acid solution, with a mass fraction of 10 % sulfuric acid. A.3.7 Sulfuric acid solution, with a mass fraction of 36 % sulfuric acid. A.3.8 Water, conforming to the requirements of Grade 3 of ISO 3696. A.4 Biological substances A.4.1 Resin, consisting of: rosin 50 % (mass fraction) pine oil 50 % (mass fraction). A.4.2 Fall-out test substance, consisting of: e.g. formic acid 47 % (mass fraction) tannic acid 24 % (mass fraction) albumin 5 % (mass fraction) honey 24 % (
