1、BRITISH STANDARDBS EN ISO 2812-1:2007Paints and varnishes Determination of resistance to liquids Part 1: Immersion in liquids other than waterThe European Standard EN ISO 2812-1:2007 has the status of a British StandardICS 87.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40
2、g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 2812-1:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50476 1
3、National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 2812-1:2007. This standard, together with BS EN ISO 2812-3:2007 and BS EN ISO 2812-4:2007, supersedes BS EN ISO 2812-1:1995, which is withdrawn. The UK participation in its preparation was entrusted to
4、 Technical Committee STI/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
5、British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2812-1January 2007ICS 87.040 Supersedes EN ISO 2812-1:1994 English VersionPaints and varnishes - Determination of resistance t
6、o liquids -Part 1: Immersion in liquids other than water (ISO 2812-1:2007)Peintures et vernis - Dtermination de la rsistance auxliquides - Partie 1: Immersion dans des liquides autres queleau (ISO 2812-1:2007)Beschichtungsstoffe - Bestimmung der Bestndigkeitgegen Flssigkeiten - Teil 1: Eintauchen in
7、 Flssigkeitenauer Wasser (ISO 2812-1:2007)This European Standard was approved by CEN on 23 December 2006.CEN members 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.
8、 Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to 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 translationu
9、nder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece,
10、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre
11、: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 2812-1:2007: EForeword This document (EN ISO 2812-1:2007) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in col
12、laboration 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 July 2007, and conflicting national
13、standards shall be withdrawn at the latest by July 2007. This document supersedes EN ISO 2812-1:1994. 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, Cyprus,
14、Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 2812-1:200
15、7 has been approved by CEN as EN ISO 2812-1:2007 without any modifications. EN ISO 2812-1:2007Reference numberISO 2812-1:2007(E)INTERNATIONAL STANDARD ISO2812-1Second edition2007-01-15Paints and varnishes Determination of resistance to liquids Part 1: Immersion in liquids other than water Peintures
16、et vernis Dtermination de la rsistance aux liquides Partie 1: Immersion dans des liquides autres que leau EN ISO 2812-1:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Apparatus 2 5 Test liquids 2 6 Sampling 2 7 Test pieces 2 8 Procedure 3 9 Evaluation 4 1
17、0 Precision 4 11 Test report . 5 Annex A (informative) Examples of test liquids 6 Bibliography . 7 EN ISO 2812-1:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International St
18、andards 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. International organizations, governmental and non-governmental, in liaison with ISO, also
19、 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 the rules given in the ISO/IEC Directives, Part 2. The main task of technical committee
20、s 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 approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possib
21、ility 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 2812-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints an
22、d varnishes. This second edition cancels and replaces the first edition (ISO 2812-1:1993), which has been technically revised. The main changes are: the standard has been split into parts 1, 3 and 4 for immersion, absorbent medium and spotting methods; the triplicate test was changed to duplicate; t
23、he types of test liquids have been added in an annex. 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 method Part 3: Method using an absorbent medium P
24、art 4: Spotting methods Part 5: Temperature-gradient oven method EN ISO 2812-1:20071Paints and varnishes Determination of resistance to liquids Part 1: Immersion in liquids other than water 1 Scope This part of ISO 2812 specifies general methods for determining the resistance of an individual-layer
25、or multi-layer system of coating materials to the effects of liquids, other than water, or paste-like products (included implicitly in test liquids mentioned in the text). These methods enable the testers to determine the effects of the test liquid on the coating and, if necessary, to assess the dam
26、age to the substrate. 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) applies. ISO
27、1513, Paints and varnishes Examination and preparation 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
28、and testing ISO 3696, Water for analytical laboratory use Specification and test methods ISO 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
29、system ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and 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 P
30、rinciple A coated test panel is exposed to a test liquid by immersion in the test liquid. The effects of the exposures are assessed in accordance with agreed criteria. EN ISO 2812-1:20072 4 Apparatus Ordinary laboratory equipment and the following apparatus. 4.1 Vessel, made of inert material, capab
31、le of holding the test liquid and test panels. 4.2 Heating cabinet, with artificial ventilation, for carrying out the test at higher temperatures (up to 40 C to within 3 C). WARNING To protect against explosion or fire, products containing volatile flammable liquids should be handled with care. Nati
32、onal regulations should be followed. 5 Test liquids One or more test liquids, as agreed between interested parties, shall be used. Examples of test liquids 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 s
33、ample in accordance with ISO 1513 and prepare it for further testing. 7 Test pieces 7.1 Shape and material 7.1.1 Panels 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. 7.1.2 Rods
34、The rod shall be made of steel. One end of a rod shall be rounded, with a radius approximately equal to the radius of the rod. NOTE 1 Rods with a length of 150 mm and a diameter of 15 mm are suitable. NOTE 2 Rods are used to eliminate edge effects. 7.2 Preparation and coating 7.2.1 Test panels Prepa
35、re 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. For Methods A and B, both sides should preferably b
36、e coated and the edges protected. It should be agreed whether the reverse side of the panel will be protected with a sufficiently resistant coating, or whether both sides of the panel will to be coated with the coating material under test. EN ISO 2812-1:200737.2.2 Test rods Prepare each test rod as
37、specified 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 rod for the specified time under specified conditions. 7.3 Coating thickness Determine the dry film thickness of the coating, in micrometres,
38、using one of the non-destructive methods specified in ISO 2808. 8 Procedure 8.1 Conditioning of the test panels or rods Immediately before testing, condition the test panels or rods for at least 16 h under standard conditions as specified in ISO 3270, i.e. (23 2) C and (50 5) % relative humidity. 8.
39、2 Test liquids with high electrical conductivity If liquids with high electrical conductivity are used, with the resultant possibility of significant electrolytic effects, only one test piece should be immersed in the test fluid. If several test pieces are immersed in a vessel, these test pieces sha
40、ll be identical. Moreover, the test liquid shall not be affected by the test pieces. The test pieces shall be at least 30 mm from the vessel walls and, if several test pieces are immersed in the same vessel, at least 30 mm from one another. The test pieces shall be electrically isolated from their h
41、olders. 8.3 Determination 8.3.1 Method A Single-phase liquid Perform the test in duplicate. Pour a sufficient quantity of test liquid into a suitable vessel (4.1) to immerse the test panel or test rod to the required depth. NOTE 1 Examples of test liquids are given in Annex A. Stand or hang the test
42、 piece in an approximately vertical position in the vessel, so that it is half-immersed in the test liquid. NOTE 2 Immersion depths other than half-immersion may be used by agreement. If several test pieces are loaded in the vessel at the same time, make sure that they are spaced at least 5 mm apart
43、 or, in the case of highly conductive test liquids, 30 mm apart (see 8.2). Cover the vessel for the duration of the test, in order to minimize liquid loss due to evaporation or splashing. If agreed, shake or stir the liquid. If agreed, compensate for any loss of liquid by adding test liquid or water
44、 conforming to the requirements of grade 3 of ISO 3696 at specified intervals, in order to keep the initial volume or initial concentration constant. If agreed, the test may be performed at a higher temperature. The vessel and the test liquid shall already be heated to the specified test temperature
45、 in a heating cabinet (4.2) before immersing the test piece. The test EN ISO 2812-1:20074 temperature shall be maintained with an accuracy of 3 C (see 4.2). The vessel shall only be removed from the cabinet for a short time in order to immerse the test pieces. The test duration shall be agreed betwe
46、en the interested parties and should reflect the end use of the coating. 8.3.2 Method B Two-phase liquid Perform the test in duplicate. Stand or hang the coated test piece in an approximately vertical position in the vessel. Test panels (see 7.1.1) shall have the 100 mm side horizontal. Saturate eac
47、h of the two test liquids with the other immediately before use. Carefully pour the test liquid having the higher density down the wall of the vessel, until it covers approximately 40 % of the test piece (panel or rod). Make sure that the test piece is not wetted above this level. Add the second liq
48、uid in the same manner, until it covers a further 40 % of the test piece. Cover the vessel and leave it to stand without stirring. If an intermediate evaluation has been agreed, take the test piece out of the liquid at the appropriate time, remove any remaining liquid from its surface, examine the t
49、est piece and re-immerse it in the liquid. NOTE In the case that the upper liquid may contaminate the lower part of test panels and/or the lower liquid, perform replicate tests for any intermediate assessments. The test duration shall be agreed between the interested parties and should reflect the end use of the coating. 9 Evaluation After the test period has expired, wipe the test piece with a cloth. Clean off any dried residue of aqueous test liquids under running water, and clean off the dried
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