1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 2: Water immersion methodThe European Standard EN ISO 2812-2:2007 has the status of a British
2、StandardICS 87.040Paints and varnishes Determination of resistance to liquids BRITISH STANDARDBS EN ISO 2812-2:2007BS EN ISO 2812-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50498 3Amendments iss
3、ued since publicationAmd. No. Date CommentsThis 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 cannot confer immunity from legal obligations.National forewordThis British Standar
4、d was published by BSI. It is the UK implementation of EN ISO 2812-2:2007. It supersedes BS EN ISO 2812-2:1995 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on STI/10 can be obtained
5、 on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2812-2January 2007ICS 87.040 Supersedes EN ISO 2812-2:1994 English VersionPaints and varnishes - Determination of resistance to liquids -Part 2: Water immersion method (ISO 2812-2:2007)Peintures et vernis - Dterminati
6、on de la rsistance auxliquides - Partie 2: Mthode par immersion dans leau (ISO2812-2:2007)Beschichtungsstoffe - Bestimmung der Bestndigkeitgegen Flssigkeiten - Teil 2: Verfahren mit Eintauchen inWasser (ISO 2812-2:2007)This European Standard was approved by CEN on 23 December 2006.CEN members are bo
7、und 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 the CE
8、N 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 status
9、 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,Romania, Slov
10、akia, 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 reservedworldwide fo
11、r CEN national Members.Ref. No. EN ISO 2812-2:2007: EForeword This document (EN ISO 2812-2:2007) 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. This Europe
12、an 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 standards shall be withdrawn at the latest by July 2007. This document supersedes EN ISO 2812-2:1994. According to the CEN/
13、CENELEC Internal Regulations, the national standards organizations of the following countries 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, Lu
14、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 2812-2:2007 has been approved by CEN as EN ISO 2812-2:2007 without any modifications. EN ISO 2812-2:2007Reference numberISO 2812-2:20
15、07(E)INTERNATIONAL STANDARD ISO2812-2Second edition2007-01-15Paints and varnishes Determination of resistance to liquids Part 2: Water immersion method Peintures et vernis Dtermination de la rsistance aux liquides Partie 2: Mthode par immersion dans leau EN ISO 2812-2:2007ii iiiContents Page Forewor
16、d iv 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Apparatus 2 5 Sampling 2 6 Test panels 2 7 Procedure 3 8 Evaluation 3 9 Precision 4 10 Test report . 4 EN ISO 2812-2:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards b
17、odies (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. International organizati
18、ons, 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 the rules given in the
19、 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 approval by at least 75 % of t
20、he 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 2812-2 was prepared by Technical Committee ISO/TC 35, Paints and
21、 varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (ISO 2812-2:1993), which has been technically revised. The main changes are: conditioning of the coated test pieces after drying (or stoving) and ageing was delete
22、d; the purity of water was changed from grade 2 to grade 3; the standard has been editorially revised to align with the new ISO 2812 series. ISO 2812 consists of the following parts, under the general title Paints and varnishes Determination of resistance to liquids: Part 1: Immersion in liquids oth
23、er than water Part 2: Water immersion method Part 3: Method using an absorbent medium Part 4: Spotting methods Part 5: Temperature-gradient oven method EN ISO 2812-2:20071Paints and varnishes Determination of resistance to liquids Part 2: Water immersion method 1 Scope This part of ISO 2812 specifie
24、s a method for determining the resistance of an individual-layer or multi-layer system of coating materials to the effects of water by partial or full immersion. This method enables the determination of the effects of water on the coating and, if necessary, the assessment of the damage to the substr
25、ate. 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 1513, Paints and
26、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 3696, Water for analytical laboratory use Specification and test methods ISO 4628-2, Paints and varnishes Evaluat
27、ion 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 ISO 15711, Paints and varnishes Determination of r
28、esistance to cathodic disbonding of coatings exposed to sea water ISO 17872, Paints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing 3 Principle A coated test panel is immersed in water and the effects of immersion are evaluated
29、by criteria agreed in advance between the interested parties, these criteria usually being of a subjective nature. EN ISO 2812-2:20072 4 Apparatus All parts of the apparatus in contact with water shall be made from inert materials. Ordinary laboratory equipment and the following apparatus: 4.1 Tank,
30、 of suitable size, fitted with a cover, a heater and thermostatic control. A convenient size of tank is 700 mm 400 mm 400 mm. 4.2 System for circulation and aeration of water, or a means for stirring, used in conjunction with a source of dry, oil-free, pressurized air. If a pump is used, it shall be
31、 of a suitable capacity to agitate the whole contents of the tank. 4.3 Support for the test panels, made from material that is electrically non-conducting, and arranged so that the panels are maintained at an angle of 15 to 20 to the vertical, with the test surface uppermost, and with their plane pa
32、rallel to the direction of flow of water in the tank. The panels shall be at least 30 mm apart, situated at least 30 mm from the bottom of the tank and at least 30 mm from the walls of the tank. Their positions shall be changed periodically, either mechanically or by hand. 5 Sampling Take a represen
33、tative sample of the coating material to be tested, in accordance with ISO 15528. Pretest each sample in accordance with ISO 1513 and prepare it for further testing. 6 Test panels 6.1 Materials and dimensions Unless otherwise specified or agreed, the test panels shall be of burnished steel complying
34、 with ISO 1514, and of approximate dimensions 150 mm 100 mm and a thickness of 0,7 mm to 1,0 mm. 6.2 Preparation and coating Prepare each test panel as described in ISO 1514, and then coat it by the specified method with the product or system under test. Both sides should preferably be coated and th
35、e 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 be coated with the coating material under test. 6.3 Drying and conditioning Dry (or stove) and age (if applicable) each coated
36、 test panel for the specified time under the specified conditions. The test procedure shall be carried out as soon as possible. 6.4 Artificial damaging If agreed between the interested parties, apply a scribe to the coating, as specified in ISO 17872, or an artificial holiday, as specified in ISO 15
37、711. EN ISO 2812-2:200736.5 Coating thickness Determine the dry film thickness of the coating, in micrometres, using one of the non-destructive methods specified in ISO 2808. 7 Procedure 7.1 Number of determinations Carry out the test in duplicate, unless otherwise agreed. 7.2 Determination Add suff
38、icient water (see the following paragraph) to the tank (4.1) such that the test panels, when positioned on the support (4.3), are immersed for three-quarters of their length. If specified, commence the circulation and aeration of the water (4.2) in the tank. Unless otherwise agreed, adjust the tempe
39、rature of water to (40 1) C and maintain this temperature throughout the test. Water conforming to the requirements of grade 3 of ISO 3696 should be used. Depending upon the end use of the coating, other grades of water may be used, for example natural or artificial seawater. Test pieces can either
40、be partially or fully immersed. If partial immersion is required, the test pieces should be immersed for three-quarters of their length. If full immersion is required, the test pieces should be immersed such that the water level is a minimum of 50 mm above the top of the test piece to avoid waterlin
41、e oxygen concentration difference effects. Place the test panels in the tank for the specified period, rearranging them at regular intervals of not more than 3 days. If water of grade 3 of ISO 3696 is used, replace the test water if at any time during the test it becomes turbid or coloured or its co
42、nductivity exceeds 2 mS/m, or if the oxygen content falls below 5 mg/l. 8 Evaluation 8.1 Interim inspections For interim inspections during the test period, if specified, remove each panel from the tank at the appropriate time(s) and dry the panels by blotting with absorbent paper. Within 1 min of d
43、rying, examine the panels for blistering in accordance with ISO 4628-2, or other signs of deterioration, and immediately return them to the tank. 8.2 Final inspection At the end of the specified test period, remove each panel from the tank and dry the panels by blotting with absorbent paper. Within
44、1 min of drying, examine the whole test surface of each panel for blistering as described in ISO 4628-2, or for other signs of deterioration of the coating. Assessment of the change of adhesion may also be carried out at this stage. Allow the panels to stay at room temperature for 24 h and examine t
45、he test surface again for loss of adhesion, rust staining, change of colour, embrittlement or other characteristics which may be specified. If specified, carefully remove a 150 mm 50 mm strip from the test surface with a non-corrosive paint remover and examine the exposed metal for signs of corrosio
46、n. For reference purposes, protect the exposed area by a suitable transparent lacquer. EN ISO 2812-2:20074 If the results of the evaluation of the duplicate determinations for blistering or other signs of deterioration differ significantly, repeat the determination, again in duplicate. Report the re
47、sults of all determinations, including any repeat determinations. 9 Precision No details are currently available for the repeatability limit (r) and reproducibility limit (R). 10 Test report The test report shall contain at least the following information: a) all information necessary for identifica
48、tion of the coating examined, including the manufacturer, trade name, batch number, etc.); b) a reference to this International Standard (ISO 2812-2:2006); c) details of the test panels, including: 1) the material (including thickness) and surface pretreatment of the substrate; 2) the application me
49、thod for applying the sample coating to the substrate, including the drying time and drying 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) details of the method used, including: 1) the duration of the test; 2) whether the test piece was fully or partially immersed and, if partially, the immersion depth; 3) the temperature of th
