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1、BRITISH STANDARD BS EN ISO 6270:1995 BS 3900-F9: 1982 Incorporating Amendment No. 1 Paints and varnishes Determination of resistance to humidity (continuous condensation) The European Standard EN ISO 6270:1995 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 2
2、0 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 6270:1995 This British Standard, having been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1982 BSI 08-
3、1999 The following BSI references relate to the work on this standard: Committee reference PVC/10 Draft for comment 78/51684 DC ISBN 0 580 13045 2 Amendments issued since publication Amd. No.Date of issueComments 8611September 1995 Indicated by a sideline in the margin Licensed Copy: sheffieldun she
4、ffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 6270:1995 BSI 08-1999i Contents Page National forewordii Foreword2 Text of EN ISO 62703 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Unc
5、ontrolled Copy, (c) BSI BS EN ISO 6270:1995 ii BSI 08-1999 National foreword This Part of BS 3900 has been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee. It is identical with ISO 6270:1980 “Paints and varnishes Determination of resistance to humidity (continu
6、ous condensation)”, published by the International Organization for Standardization (ISO). In 1995 the European Committee for Standardization (CEN) accepted ISO 6270:1980 as European Standard EN ISO 6270:1995. As a consequence of implementing the European Standard this British Standard is renumbered
7、 as BS EN ISO 6270:1995 and any reference to BS 3900-F9 should be read as a reference to BS EN ISO 6270. Part F2 of this British Standard describes a similar method using cyclic condensation conditions, but that method has not been adopted by ISO. While it is hoped that Part F2 will be superseded by
8、 this new Part, Part F2 will remain available subject to assessment of its continued need at its next review. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conven
9、tions are not identical with those used in British Standards; attention is drawn especially to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. A British Standard does not purport to include all the necessary pr
10、ovisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard BS 3900 Methods of test for paints ISO
11、 1512:1974Part A1:1970 Sampling (Technically equivalent) ISO 1513:1980Part A2:1970 Examination and preparation of samples for testing (Technically equivalent) ISO 1514:1974Part A3:1970 Standard panels for paint testing (Technically equivalent) ISO 2808:1974Part C5:1975 Determination of film thicknes
12、s (Technically equivalent) ISO 3270:1980National appendix to Part C8:1978 Print free test (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 6, an inside back cover and a back cover. This standard
13、has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPI
14、SCHE NORM EN ISO 6270 March 1995 ICS 87.040 Descriptors: Paints, varnishes, tests, water vapour tests, test equipment English version Paints and varnishes Determination of resistance to humidity (continuous condensation) (ISO 6270:1980) Peintures et vernis Dtermination de la rsistance lhumidit (par
15、condensation continue) (ISO 6270:1980) Lacke und Anstrichstoffe Bestimmung der Bestndigkeit gegen Feuchtigkeit (kontinuierliche Kondensation) (ISO 6270:1980) This European Standard was approved by CEN on 1995-01-05. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stip
16、ulate 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 Central Secretariat or to any CEN member. This European Standard e
17、xists 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 Central Secretariat has the same status as the official versions. CEN members are the national standards
18、bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central S
19、ecretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN ISO 6270:1995 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 6270:1995 BSI 08-1999 2 Foreword The text of the International Standard
20、 has been taken as a European Standard by the Technical Committee CEN/TC 139, Paints and varnishes, from ISO/TC 35, Paints and varnishes, of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard, either by publication of an
21、identical text or by endorsement, at the latest by September 1995, and conflicting national standards shall be withdrawn at the latest by September 1995. Accordance to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denma
22、rk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTENormative references to international publications are given in Annex ZA (normative). Contents Page Foreword2 0Introduction3 1Scope and fie
23、ld of application3 2References3 3Apparatus3 4Sampling3 5Test panels4 6Procedure4 7Test report4 Annex ZA (normative) Normative references to international publications with their relevant European publications6 Figure General arrangement of a suitable apparatus for determination of resistance to humi
24、dity5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 6270:1995 BSI 08-19993 0 Introduction This International Standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products. I
25、t should be read in conjunction with ISO 1512, ISO 1513, ISO 1514, ISO 2808 and ISO 3270. The method of test specified requires to be completed for any particular application by the following supplementary information. This information shall be derived from the International Standard or national sta
26、ndard or other document for the product under test or, if appropriate, shall be the subject of agreement between the interested parties. a) Material, thickness and surface preparation of substrate. b) Method of application of test coating and details of sealing of edges and backs of the test panels
27、(if required). c) Thickness, in micrometres, of the dry coating, including method of measurement and whether it is a single coating or a multicoat system. d) Duration and conditions of drying of coated test panels (or conditions of stoving and ageing, if applicable) before testing. e) Duration of te
28、st period, including whether the test period is to be interrupted at intervals (for example during weekends). f) When inspection of the test coating is to be carried out, including details of recovery period if applicable. g) What characteristics of the test coating and substrate are to be considere
29、d in evaluating the resistance properties of the coating. 1 Scope and field of application 1.1 This International Standard specifies a method for determining the resistance of paint films, paints systems and allied products to conditions of high humidity. 1.2 The method is applicable to coatings bot
30、h on porous substrates such as wood, plaster and plasterboard, and on non-porous substrates such as metal. It provides an indication of performance likely to be obtained under severe conditions of exposure where continuous condensation occurs on the surface. 1.3 The procedure may reveal failures of
31、the coating (including blistering, staining, softening, wrinkling and embrittlement) and deterioration of the substrate. 2 References ISO 1512, Paints and varnishes Sampling. ISO 1513, Paints and varnishes Examination and preparation of samples for testing. ISO 1514, Paints and varnishes Standard pa
32、nels for testing. ISO 2808, Paints and varnishes Determination of film thickness. ISO 3270, Paints and varnishes and their raw materials Atmospheres for conditioning and testing. 3 Apparatus 3.1 The apparatus consists essentially of an electrically heated water bath, so constructed that the cover is
33、 formed by the blanking panels (see 3.5) or the test panels, the upper faces of which are exposed to the environment (see 3.2). It is preferable for the apparatus to be so designed that it will accommodate test panels of size 150 mm 100 mm. The apparatus shall be constructed of chemically inert mate
34、rial. 3.2 The water in the bath shall be maintained at 40 2 C and the apparatus shall be operated in a draught-free environment maintained at 23 2 C. 3.3 The sides of the water bath shall be suitably insulated to ensure that the temperature in the air-space, measured 25 mm below the test panels, is
35、uniform, constant to within 2 C and not lower than 35 C. 3.4 The top of the bath shall be so constructed that the test panels are held at an angle of 15 5 to the horizontal to permit drainage of condensed water, but shall be such that water draining from one panel does not come into contact with ano
36、ther. 3.5 Suitable inert blanking panels (for example opaque glass panels) shall be provided for use in setting up the apparatus and if the number of test panels is insufficient to form a complete cover. NOTEA schematic diagram of a suitable apparatus is shown in the Figure. 4 Sampling Take a repres
37、entative sample of the product to be tested (or of each product in the case of a multicoat system) as specified in ISO 1512. Examine and prepare the sample for testing as specified in ISO 1513. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
38、 EN ISO 6270:1995 4 BSI 08-1999 5 Test panels 5.1 Material The test panels shall be of the specified material complying, if appropriate, with ISO 1514. Unless otherwise specified, the test panels shall be of size 150 mm 100 mm. NOTEAs the results can be significantly affected by the thickness of the
39、 substrate, it is important to ensure that the dimensions of the panels are appropriate to the end use for which the coating is being tested. 5.2 Preparation and coating Prepare the test panels as specified, in accordance with ISO 1514 if appropriate. Coat them by the specified method with the produ
40、ct or system under test and dry (or stove and age them) for the specified period. Unless otherwise agreed, dry the panels, with free circulation of air, in a vertical position in the standard atmosphere in accordance with ISO 3270 23 2 C and (50 5) % relative humidity. For many purposes, it is suffi
41、cient to coat only one face of the test panel. However, it is necessary to specify whether the back and/or edges are to be sealed and, if so, whether it should be with the product or system under test or with a suitable sealant. 5.3 Thickness of coating Determine the thickness, in micrometres, of th
42、e dry coating by the method specified, using one of the procedures specified in ISO 2808, but avoiding destructive methods which cut through the film. 6 Procedure 6.1 Set up the apparatus with blanking panels in position. When the conditions specified in 3.2 and 3.3 are attained, swiftly replace the
43、 blanking panels with the test panels so that the test surface faces the water. In order to prevent a galvanic couple, the test panels shall not be allowed to come into contact with each other or with other metallic material. Non-metallic filler strips shall be used between the panels. 6.2 Continue
44、the test for the specified period, if appropriate removing the test panels from the apparatus for any periods of interruption, immediately substituting blanking panels. During such periods, keep the test panels in the standard atmosphere in accordance with ISO 3270. Unless the apparatus automaticall
45、y maintains the level of the water, adjust this by regular addition. 6.3 For interim inspections during the test period, if specified, remove the panels from the apparatus, blot them with absorbent paper, examine them for signs of deterioration and then immediately return them to the apparatus. If a
46、 longer examination is needed, put a blanking panel at the place of the test panel. 6.4 At the end of the specified test period, remove the panels from the apparatus, blot them with absorbent paper and immediately examine the test surfaces for signs of deterioration. If required, keep the panels in
47、the standard atmosphere in accordance with ISO 3270 for the specified recovery period and again examine the test surfaces for deterioration. If it is required to examine the substrate for signs of attack, remove the coating by an appropriate method. 7 Test report The test report shall contain at lea
48、st the following information: a) the type and identification of the product tested; b) a reference to this International Standard or to a corresponding national standard; c) the items of supplementary information referred to in the introduction to this International Standard; d) the national standar
49、d or other document supplying the information referred to in c) above; e) any deviation, by agreement or otherwise, from the test procedure described; f) the results of the test, in terms of the stated requirements; g) the date of the test. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:57:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 6270:1995 BSI 08-19995 Figure General arrangement of a suitable apparatus for determination of resistance to humidity Licensed Copy: sheffieldun sheffieldun, na, Mon No