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1、BRITISH STANDARD BS ISO 15710:2002 Paints and varnishes Corrosion testing by alternate immersion in and removal from a buffered sodium chloride solution ICS 87.040 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 15710:2002 This Brit
2、ish Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 14 October 2002 BSI 14 October 2002 ISBN 0 580 40549 4 National foreword This British Standa
3、rd reproduces verbatim ISO 15710:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints, which has the responsibility to: A list of organizations represented on this committee can be obtained on
4、 request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electron
5、ic Catalogue or of British Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquirers to unde
6、rstand the text; present to the responsible 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. Summary of pages This document compris
7、es a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Lice
8、nsed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 15710 First edition 2002-10-01 Reference number ISO 15710:2002(E) Paints and varnishes Corrosion testing by alternate immersion in and removal from a buffered sodium chlo
9、ride solution Peintures et vernis Essais de corrosion par immersions-mersions alternes dans une solution tamponne de chlorure de sodium BS ISO 15710:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO :01751(2002)E ii ISO 2002 Ar llithg
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15、ntrolled Copy, (c) BSI ISO 17512002:0)E( ISO 2002 r llAithgs reservde iii Contents Page 1Scope . 1 2Normative references . 1 3Principle 1 4Required supplementary information . 1 5Initial test solution . 2 6Apparatus . 2 7Sampling . 2 8Test panels . 3 9Procedure . 4 10Inspection of test panels . 5 11
16、Precision . 5 12Test report 5 Annex ARequired supplementary information 6 BS ISO 15710:2002 iii Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO :01751(2002)E vi ISO 2002 Ar llithgr seresvde Foreword ISO (the International Organization fo
17、r Standardization) is a worldwide federation 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
18、 right to be represented on that committee. International 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. Internati
19、onal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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
20、 bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 15710 was prepared by Technical Comm
21、ittee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. Annex A forms a normative part of this International Standard. BS ISO 15710:2002 iv Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO
22、17512002:0)E( ISO 2002 r llAithgs reservde v Introduction Coatings of paints, varnishes and similar materials are exposed to alternating wet and dry (humid) cyclic conditions using a specified salt solution in a cabinet in order to simulate, in the laboratory, processes occurring in aggressive outdo
23、or conditions. Generally, correlations between such outdoor weathering and laboratory testing cannot be expected because of the large number of factors influencing the breakdown process. Correlation can only be expected if the effect on the coating of important parameters (e.g. nature of the salt, s
24、pectral distribution of the incident radiation in the relevant photochemical region, temperature of the specimen, type and cycle of wetting and relative humidity) is known. In contrast to outdoor weathering, laboratory testing in a cabinet is performed under a reduced number of variables which can b
25、e controlled and therefore the effects are more reproducible. The method may also give a means of checking that the quality of a paint or paint system is being maintained. The method has been found to be useful in comparing the alternate immersion/emersion salt solution resistance of different coati
26、ngs. It is most useful in providing relevant ratings for a series of coated panels exhibiting significant differences in alternate immersion/emersion salt solution resistance. This method is intended principally for testing paints used in aerospace applications. The types of conditions specified may
27、 occur as an aircraft flies through a variety of environments including sudden changes in temperature and pressure. The results of the test specified in this International Standard will give an indication of the ability of a paint system to withstand these corrosive atmospheres. BS ISO 15710:2002 v
28、Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ANRETNIITOTS LANDNADRAISO 17512002:0)E( ISO 2002 r llAithgs reservde 1 Paints and varn
29、ishes Corrosion testing by alternate immersion in and removal from a buffered sodium chloride solution 1Scope This International Standard describes a test procedure for assessing the protection offered by coatings of paints or varnishes on aluminium and aluminium alloys against corrosion arising aga
30、inst a scribe mark cut through the coating, when the coated panel is subjected to a test regime of alternate immersion in and removal from a dilute salt solution. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions o
31、f this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normat
32、ive documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1513, Paints and varnishes Examination and preparation of samples for testing ISO 1514, P
33、aints 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 3696, Water for analytical laboratory use Specification and test methods
34、ISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of intensity, quantity and size of common types of defect Part 1: General introduction and designation system ISO 4628-8, Paints and varnishes Evaluation of degradation of coatings Designation of intensity, quantity a
35、nd size of common types of defect Part 8: Evaluation of corrosion around a scribe ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3Principle A coated test panel is scribed in a defined way. The panel is then exposed in a test chamber at , where it is alternately imme
36、rsed in salt solution and then removed and exposed at a relative humidity greater than . The effects of this test being then evaluated by criteria agreed in advance between the interested parties, these criteria usually being of a subjective nature. 4Required supplementary information For any partic
37、ular application, the test method specified in this International Standard needs to be completed by supplementary information. The items of supplementary information are given in annex A. 35 C 80 % BS ISO 15710:2002 1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Un
38、controlled Copy, (c) BSI ISO :01751(2002)E 2 ISO 2002 Ar llithgr seresvde 5Initial test solution Prepare the initial test solution by dissolving the following salts in water of at least grade 3 purity in accordance with ISO 3696, to produce the required concentration given in Table 1. The salts shal
39、l be white and shall comply with the purity requirements given in Table 2. The pH of the initial test solution shall be in the range (). The pH determination shall be based on electrometric measurement at . Any necessary correction shall be made by adding hydrochloric acid or sodium carbonate soluti
40、on (of purity complying with Table 2) of appropriate concentration. 6Apparatus Ordinary laboratory apparatus and glassware, together with the following: 6.1Test cabinet, capable of being maintained at and a relative humidity of unless otherwise agreed, which will hold the individual salt solution ta
41、nks (6.2). The cabinet shall also have provision for hanging the test panels in a vertical position and raising and lowering them automatically so that they will be fully immersed for in the individual salt solution tanks and then removed from the salt solution for , the cycle to be repeated until t
42、he end of the test period, unless otherwise specified. 6.2Individual salt solution tanks, made of suitable material and capable of holding at least of test solution per of test panel. When a panel is immersed, it shall be at least from the edge of the container. When calculating the test panel area,
43、 the backs of the panels shall also be taken into account. 7Sampling Take a representative sample of the product to be tested (or of each product in the case of a multi-coat system), as described in ISO 15528. Examine and prepare each sample for testing, as described in ISO 1513. Table 1 Salt soluti
44、on concentration Salt Concentration Sodium chloride30 Disodium hydrogen orthophosphate0,19 Boric acid1,25 Table 2 Salt purity Impurity Maximum mass percentage of impurity (calculated on the dry salt) Total0,5 Iodide0,1 Copper0,001 Nickel0,001 g/l % 80,2 25 C (352) C 80 % 2 h2 h 4 ml cm220 mm BS ISO
45、15710:2002 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:34:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 17512002:0)E( ISO 2002 r llAithgs reservde 3 8Test panels 8.1Material and dimensions Unless otherwise specified or agreed, the test panels shall be of aluminium complying with
46、ISO 1514, and be of approximate minimum dimensions with a small hole at one end. The short dimension shall be in the direction of rolling (see Figure 1). 8.2Preparation and coating of panels Unless otherwise specified, prepare each test panel in accordance with ISO 1514 and then coat it by the speci
47、fied method with the product or system under test. Unless otherwise specified, the back and edges of the panel shall be coated with the product or system under test. If the coating on the back and edges of the panel differs from that of the product under test, it shall not contain corrosion-inhibiti
48、ng ingredients (i.e. it shall be an inert coating) and it shall have a corrosion resistance greater than that of the product under test. 8.3Drying and conditioning Dry (or stove) and age (if applicable) each coated test panel for the specified time under the specified conditions, and then, unless ot
49、herwise specified, condition them at a temperature and relative humidity as defined in ISO 3270 for at least , with free circulation of air and without exposing them to direct sunlight. The test procedure shall then be carried out as soon as possible. 8.4Dry film thickness Determine the thickness, in micrometres, of the dried coating by one of the non-destructive procedures described in ISO 2808. Key 1Direction of rolling