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1、BRITISH STANDARD BS EN ISO 8565:1995 Metals and alloys Atmospheric corrosion testing General requirements for field tests The European Standard EN ISO 8565:1995 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c)
2、 BSI BS EN ISO 8565:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1995 BSI 01-2000 The following BSI reference relates to the work on this standard:
3、Committee reference ISE/NFE/8 Draft for comment 87/40092 DC ISBN 0 580 24042 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ISE/NFE/8, Corrosion of metals and alloys, upon which the following bodies were represented: A
4、EA Technology Aluminium Federation British Gas plc British Iron and Steel Producers Association British Non-Ferrous Metals Federation Department of Trade and Industry (National Physical Laboratory) Department of Transport (Transport Research Laboratory) Electricity Association Institute of Corrosion
5、 Ministry of Defence Society of Chemical Industry Welding Institute Zinc Development Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8565:1995 BSI 01-2000i Conten
6、ts Page Committees responsibleInside front cover National forewordii Foreword2 Introduction3 1Scope3 2Normative references3 3Requirements for test specimens3 4Atmospheric corrosion test sites5 5Test site characterization7 6Operating conditions7 7Test procedure8 8Test report8 Annex A (normative) Envi
7、ronmental factors characterizing atmospheric exposure conditions9 Annex ZA (normative) Normative references to international publications with their relevant European publications9 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Unc
8、ontrolled Copy, (c) BSI BS EN ISO 8565:1995 ii BSI 01-2000 National foreword This British Standard has been prepared by Technical Committee ISE/NFE/8 and is the English language version of EN ISO 8565:1994 Metals and alloys Atmospheric corrosion testing General requirements for field tests, publishe
9、d by the European Committee for Standardization (CEN). It is identical with ISO 8565:1992, published by the International Organization for Standardization (ISO). No British Standard is superseded. A British Standard does not purport to include all the necessary provisions of a contract. Users of Bri
10、tish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard BS 1747 Methods for measurement of air pollution ISO 4221:1980 Air qualit
11、y Determination of mass concentration of sulphur dioxide in ambient air Thorin spectrophotometric method Part 7:1983 Determination of mass concentration of sulphur dioxide in ambient air: Thorin spectrophotometric method ISO 4226:1980 Air quality General aspects Units of measurement BS 6069 Characte
12、rization of air quality Part 1:1981 Units of measurement ISO 4540:1980 Metallic coatings Coatings cathodic to the substrate Rating of electroplated test specimens subjected to corrosion tests BS 5466 Methods for corrosion testing of metallic coatings Part 6:1982 Rating of results of corrosion tests
13、on electroplated coatings cathodic to the substrate ISO 4543:1981 Metallic and other non- organic coatings General rules for corrosion tests applicable for storage conditions BS EN ISO 4543:1995 Metallic and other non-organic coatings General rules for corrosion tests applicable for storage conditio
14、ns 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 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the a
15、mendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8565 January 1995 ICS 77.060 Descriptors: Metals, alloys, corrosion, tests, corrosion tests, a
16、tmospheric corrosion tests, field corrosion tests, test specimens, testing conditions English version Metals and alloys Atmospheric corrosion testing General requirements for field tests (ISO 8565:1992) Mtaux et alliages Essais de corrosion atmosphrique Prescriptions gnrales de lessai in situ (ISO 8
17、565:1992) Metalle und Legierungen Korrosionsversuche in der Atmosphre Allgemeine Anforderungen an Freibewitterungsversuche (ISO 8565:1992) This European Standard was approved by CEN on 1994-10-03. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condition
18、s 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 exists in three offi
19、cial 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 bodies of Austria,
20、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 Secretariat: rue de
21、Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN ISO 8565:1995 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8565:1995 BSI 01-2000 2 Foreword This European Standard has been taken over by the Technic
22、al Committee CEN/TC 262, Protection of metallic materials against corrosion, from the work of ISO/TC 107, Metallic and other inorganic coatings, of the International Organization for Standardization (ISO). This document was submitted to the formal vote and was adopted by CEN as a European Standard.
23、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 1995, and conflicting national standards shall be withdrawn at the latest by July 1995. In accordance with the CEN/CENELEC Internal Regulations
24、, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun
25、 Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8565:1995 BSI 01-20003 Introduction Corrosion testing under atmospheric exposure conditions is carried out in order to obtain data on the corrosion resistance of metals, alloys1) and other inorganic metallic coatings1) in atmospheric
26、 environments; evaluate the relationship between the results under given laboratory conditions and in an atmospheric environment; evaluate the type of corrosion of particular metals. It involves exposure of the specimens to the action of atmospheric environments at the test sites and periodic checki
27、ng of the test specimens. It does not cover service corrosion testing. The corrosion rate of the specified metal depends on the environment of the atmospheric corrosion test site. The relationship between corrosion rates for metals and atmospheric variables is complex. Therefore the results of field
28、 tests cannot be used to predict service performance exactly, but do provide an approximate guidance to service performance. 1 Scope This International Standard establishes general requirements for stationary corrosion testing of metals and metallic coatings under atmospheric conditions carried out
29、in the open air or under shelters. It may also be applied for indoor testing. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid.
30、All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standa
31、rds. ISO 4221:1980, Air quality Determination of mass concentration of sulphur dioxide in ambient air Thorin spectrophotometric method. ISO 4226:1980, Air quality General aspects Units of measurement. ISO 4540:1980, Metallic coatings Coatings cathodic to the substrate Rating of electroplated test sp
32、ecimens subjected to corrosion tests. ISO 4543:1981, Metallic and other non-organic coatings General rules for corrosion tests applicable for storage conditions. ISO 6879:1983, Air quality Performance characteristics and related concepts for air quality measuring methods. ISO 8403:1991, Metallic coa
33、tings Coatings anodic to the substrate Rating of test specimens subjected to corrosion tests. ISO 8407:1991, Corrosion of metals and alloys Removal of corrosion products from corrosion test specimens. ISO 9225:, Corrosion of metals and alloys Corrosivity of atmospheres Measurement of pollution2). IS
34、O 9226:, Corrosion of metals and alloys Corrosivity of atmospheres Determination of corrosion rate of standard specimens for the evaluation of corrosivity2). 3 Requirements for test specimens 3.1 Types of specimen 3.1.1 Flat sheet specimens Rectangular specimens in the form of flat sheets are the pr
35、eferred type as they can be readily weighed and measured and their simple shape facilitates attachment to test frames. A convenient specimen size is 150 mm 100 mm. Specimens may be larger provided that they can be accurately evaluated. The specimen thickness shall be adequate to ensure that the spec
36、imens will survive the intended test period. The specimen thickness shall also take into account the possibility of mechanical effects and of intergranular corrosion in some materials. The most convenient thickness is 1 mm to 3 mm. For specimens with metallic coatings the surface area of the test sp
37、ecimens should be as large as possible, in any case not less than 50 cm2(5 cm 10 cm). If the coated articles used are smaller than 50 cm2 in area, specimens of the same kind may be combined to total the required minimum surface area. However, the results obtained will not necessarily be comparable w
38、ith those obtained on specially prepared test specimens of the specified minimum area. 3.1.2 Irregularly shaped specimens Other specimen shapes such as bolts, tubes, rods, angles and even assemblies may be tested if necessary. The ends of tube specimens shall be sealed if corrosion of the outside su
39、rface only is of interest. 1) Hereinafter referred to as “metals”. 2) To be published. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 08:54:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8565:1995 4 BSI 01-2000 Complex specimens, such as assemblies, may contain crevices, water traps, w
40、eldments and dissimular metals. It is therefore important to take account of the effects of these on the corrosion resistance of the assembly. Care should also be taken to position the assembly to simulate its intended use. 3.1.3 Specimens with weldments Atmospheric corrosion tests on weldments are
41、intended to reveal any tendency for preferential corrosion in the weldment zone arising from metallurgical or compositional differences between the weld metal and the parent material. The joints shall preferably be placed in the centre of the test specimen, parallel to its long side; or perpendicula
42、r, if required by technical specifications. 3.2 Specimen preparation Because atmospheric corrosion tests may extend over many years, it is important to ensure that specimens are clearly identified and records of data are carefully kept. It is normally necessary to cut specimens from larger pieces of
43、 the metal to be tested and to carry out deburring. These operations involve the risk of surface damage to the specimens and, with some metals, may lead to significant changes in metallurgical condition (for example work-hardening of sheared or cut edges). Surface damage can be avoided with care, wh
44、ilst work-hardened edges should be removed by machining, unless the effects of this condition are being specifically evaluated. Similar damage may be caused by other operations such as flame-cutting, sawing and grinding. When the results of the test are to be compared with service performance, it is
45、 recommended that specimens be exposed with surfaces identical or similar to those which would apply in service. For all other purposes, a well-defined surface preparation is needed. Surface preparation may involve a combination of a degreasing stage using organic solvents or alkaline degreasing flu
46、ids and a mechanical or chemical descaling treatment for surfaces bearing mill scale, heat-treatment scale or rust. Suitable descaling treatments for a wide range of metals are given in ISO 8407:1991, Tables 1 and 2. For metallic and inorganic coatings, it is absolutely necessary to avoid cleaning m
47、ethods which may attack the surface of test specimens. 3.3 Handling After final surface cleaning before exposure, it is important that limited handling occurs. In general, it is necessary to use clean gloves in the final handling operations. 3.4 Marking of specimens Mark the test specimens in such a
48、 way that no confusion during the exposure is possible. Marking shall be legible and durable over the whole period of exposure and shall be made on those areas of the test specimens that are not subjected to visual assessment and have no functional purpose. The test specimens may be marked with appr
49、opriate numbers by stamping. For metals, notched specimens or drilled holes can be used. Other marking procedures can be used, provided that the requirements of legibility and durability are met. Methods suggested for marking are different. For metallic coatings the preferred method is positional notch coding before the protective coating is applied. The area affected by marking shall be minimized. The establishment of a reliable map of specimen identity, exposure data and location on the e
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