1、BRITISH STANDARD Paints and varnishes Determination of re si stance to humi di ty Part 1: Continuous condensation The European Standard EN IS0 6270-1:2001 has the status of a British Standard ICs 87.040 BS EN IS0 6270- 1 1200 1 BS 3900-F9:2001 Incorporating Corrigendum No. I Wk present to the respon
2、sible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on r
3、equest to its secretary. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” faci
4、lity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions 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 obliga
5、tions. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iii, a blank page, pages 1 to 5, the Annex ZA page, an inside back cover and a back cover. The BSI copyright date displayed in this
6、document indicates when the document was last issued. 13641 Incorporating Corrigendum No. 1 O BSI 18 January 2002 ISBN O 580 37934 5 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 6270-1 August 2001 ICs 87.040 Supersedes EN IS0 6270:1995 English version Paints and varnishes - Determination
7、 of resistance to humidity - Part 1 : Continuous condensation (IS0 6270-1 : 1998) Peintures et vernis - Dtermination de la rsistance lhumidit - Partie 1: Condensation continue (IS0 6270- 1 : 1998) Lacke und Anstrichstoffe - Bestimmung der Bestndigkeit gegen Feuchtigkeit - Teil 1 : Kontinuierliche Ko
8、ndensation (IS0 6270-1:1998) This European Standard was approved by CEN on 29 June 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
9、 and bibliographical references concerning such national standards may be obtained on application to the 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 translation under the responsib
10、ility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlan
11、ds, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved
12、 worldwide for CEN national Members. Ref. No. EN IS0 6270-1:2001 E EN IS0 6270-12001 I CORRECTED 2001-11-07 I Foreword The text of the International Standard from Technical Committee ISO/TC 35 “Paints and varnishes“ of the International Organization for Standardization (ISO) has been taken over as a
13、n European Standard by Technical Committee CEN/TC 139 “Paints and varnishes“, the secretariat of which is held by DIN. This European Standard supersedes EN IS0 6270:1995. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorse
14、ment, at the latest by February 2002, and conflicting national standards shall be withdrawn at the latest by February 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgiu
15、m, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 6270-1:1998 has been approved by CEN as a European Standa
16、rd without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). INTERNATIONAL STANDARD IS0 6270-1 First edition 1998-04-01 Paints and varnishes - Determination of resistance to humidity - Part 1: Con ti nu ou s cond e nsa t ion Peintures et vern
17、is - Dtermination de la rsistance lhumidit - Partie I: Condensation continue Reference number IS0 6270-1 :1998(E) EN IS0 6270-12001 Contents 1 2 3 4 5 6 7 8 9 10 11 Scope . . Normative references Principle . . . . Method of exposure of test panels Examination of test panels Precision . Test report .
18、 Annex A (normative) Required supplementary information Page 1 1 2 2 2 2 3 3 3 4 4 5 II EN IS0 6270-12001 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is nor
19、mally carried out through IS0 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 take part in
20、 the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard
21、requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 6270-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee 9, General test methods for paints and varnishes. It cancels and replaces IS0 6270:1980, of which it constitutes
22、 a minor techn ica I revision. It differs from IS0 6270:1980 in that the angle of the panels to the horizontal has been changed from (15 I5)“ to (60 I5)“ and the temperature of the air below the panels is maintained at (38 12) “C rather than at that of the water itself. Work has shown that the resul
23、ts do not differ substantially between the two sets of conditions. At the date of publication, IS0 6270 consisted of only one part, under the general title Paints and varnishes - Determination of resistance to humidity: - Part I: Continuous condensation Other parts will be added at a later date. One
24、 of these parts will be IS0 1 1503:1995, Paints and varnishes - Determination of resistance to humidity (intermittent condensation), which will be renumbered into this series. Annex A forms an integral part of this part of IS0 6270. . 111 EN IS0 6270-12001 Paints and varnishes - Determination of res
25、istance to humidity - Part 1: Conti nu ou s condensation 1 Scope This part of IS0 6270 is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products. It specifies a method for determining the resistance of paint films, paints systems and related prod
26、ucts to conditions of high humidity in accordance with the requirements of coating or product specifications. The method is applicable to coatings both on porous substrates such as wood, plaster and plasterboard and on non-porous substrates such as metal. It provides an indication of the performance
27、 likely to be obtained under severe conditions of exposure where continuous condensation occurs on the surface. The procedure may reveal failures of the coating (including blistering, staining, softening, wrinkling and embrittlement) and deterioration of the substrate. 2 Normative references The fol
28、lowing standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 6270. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 6270 are encouraged to
29、investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 151 2: 1991, Paints and varnishes - Sampling of products in liquid or paste form. IS0 151 3: 1992, Paints and v
30、arnishes - Examination and preparation of samples for testing. IS0 1514:1993, Paints and varnishes - Standard panels for testing. IS0 2808:1997, Paints and varnishes - Determination of film thickness. IS0 3270: 1984, Paints and varnishes and their raw materials - Temperatures and humidities for cond
31、itioning and testing. IS0 3696: 1987, Water for analytical laboratory use - Specification and test methods. IS0 4628-1 :I 982, Paints and varnishes - Evaluation of degradation of paint coatings - Designation of intensity, quantity and size of common types of defect - Part I: General principles and r
32、ating schemes. IS0 4628-2:1982, Paints and varnishes - Evaluation of degradation of paint coatings - Designation of intensity, quantity and size of common types of defect - Part 2: Designation of degree of blistering. IS0 4628-3:1982, Paints and varnishes - Evaluation of degradation of paint coating
33、s - Designation of intensity, quantity and size of common types of defect - Part 3: Designation of degree of rusting. 1 EN IS0 6270-1:2001 IS0 4628-4:1982, Paints and varnishes - Evaluation of degradation of paint coatings - Designation of intensity, quantity and size of common types of defect - Par
34、t 4: Designation of degree of cracking. IS0 462831 982, Paints and varnishes - Evaluation of degradation of paint coatings - Designation of intensity, quantity and size of common types of defect - Part 5: Designation of degree of flaking. 3 Principle A coated test panel is exposed to continuous cond
35、ensation and the effects of the exposure are evaluated by criteria agreed in advance between the interested parties, these criteria usually being of a subjective nature. 4 Required supplementary information For any particular application, the test method specified in this part of IS0 6270 needs to b
36、e completed by supplementary information. The items of supplementary information are given in annex A. 5 Apparatus 5.1 The apparatus shall be constructed of chemically resistant materials and consist essentially of an electrically heated water bath, designed so that the cover is formed by the blanki
37、ng panels (see 5.5) or test panels, the upper faces of which are exposed to the environment (see 5.2). It is preferable for the apparatus to be designed so that it will accommodate test panels of size 150 mm x 100 mm. 5.2 The sides of the water bath shall be suitably insulated to ensure that the tem
38、perature in the air space above the water when measured approximately 25 mm below the test panels is maintained at a uniform temperature of (38 12) OC unless otherwise specified (see annex A, item e). NOTE - Temperatures of 49 OC and 60 OC are recommended if 38 OC is too low. 5.3 The apparatus shall
39、 be operated in a draught-free environment maintained at (23 12) OC. NOTE - This test method will not work if the ambient temperature is higher than the test temperature, as no condensation will be formed on the test panels. 5.4 The top of the bath shall be designed so that the test panels are held
40、at the preferred angle of (60 I5)“ to the horizontal to permit drainage of condensed water, and shall be such that water draining from one panel does not come into contact with another. An angle of (15 I5)“ may be used on old equipment if specified (see the foreword). 5.5 Suitable inert blanking pan
41、els shall be provided for use in setting up the apparatus and if the number of test panels is insufficient to form a complete cover. 5.6 The water used should preferably be of at least grade 3 purity as defined in IS0 3696. Water of lower quality may be used, but problems may arise with build-up of
42、insoluble matter in the water bath, which will require regular cleaning. 5.7 The water shall be maintained at a constant level by means of an automatic control device. 6 Sampling Take a representative sample of the product to be tested (or of each product in the case of a multicoat system), as speci
43、fied in IS0 1512. Examine and prepare the sample for testing, as specified in IS0 1513. 2 EN IS0 6270-12001 7 Test panels 7.1 Material and dimensions Unless otherwise specified or agreed, the test panels shall be of burnished steel complying with IS0 1514, and of minimum dimensions 70 mm x 100 mm x
44、0,3 mm. NOTE - As the results can be significantly affected by the thickness of the 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. 7.2 Preparation and coating Unless otherwise specified, prepare each test p
45、anel in accordance with IS0 1514 and then coat it by the specified method with the product or system under test. For many purposes, it is sufficient to coat only one face of the test panel. However, it is necessary to specify whether the back and/or edges of the panel are to be sealed and, if so, wh
46、ether it should be with the product or system under test or with a suitable sealant (see annex A, item b). 7.3 Drying and conditioning Dry (or stove) and age (if applicable) each coated test panel for the specified time under the specified conditions, and, unless otherwise specified, condition them
47、in a standard atmosphere in accordance with IS0 3270 for at least 16 h, with free circulation of air and without exposing them to direct sunlight. The test procedure shall then be carried out as soon as possible. 7.4 Thickness of coating Determine the thickness, in micrometres, of the dry coating us
48、ing one of the non-destructive procedures described in IS0 2808. 8 Method of exposure of test panels Carry out the determination in duplicate, unless otherwise specified. 8.1 Set up the apparatus with blanking panels in position and allow the apparatus to come to equilibrium. When the conditions spe
49、cified in 5.2 are attained, swiftly replace the blanking panels with the test panels so that the test surface faces the water. NOTE - It is recommended that a control specimen of a paint with known durability be included with each series of test panels. 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. If the panels have not been edged (see 7.2) then non-metallic filler strips shall be used between the panels. 8.2 Run the apparatus continuously throughout the prescribed t
