BS EN ISO 8565-2011 Metals and alloys Atmospheric corrosion testing General requirements《金属和合金 大气腐蚀试验 一般要求》.pdf

1、BS EN ISO 8565:2011Metals and alloys Atmospheric corrosion testing General requirements (ISO8565:2011)BS EN ISO 8565:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 8565:2011.It supersedes BS EN ISO 8565:1995 which is withdrawn.The UK participation in i

2、ts preparation was entrusted to TechnicalCommittee ISE/NFE/8, Corrosion of metals and alloys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible

3、for its correctapplication. BSI 2011ISBN 978 0 580 69027 3ICS 77.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicatio

4、nDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8565 July 2011 ICS 77.060 Supersedes EN ISO 8565:1995English Version Metals and alloys - Atmospheric corrosion testing - General requirements (ISO 8565:2011) Mtaux et alliages - Essais de corrosion atmosphrique - Exigences g

5、nrales (ISO 8565:2011) Metalle und Legierungen - Korrosionsversuche in der Atmosphre - Allgemeine Anforderungen (ISO 8565:2011)This European Standard was approved by CEN on 30 June 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi

6、ng 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three offi

7、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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of

8、 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

9、 EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8565:2011: EBS EN I

10、SO 8565:2011EN ISO 8565:2011 (E) 3 Foreword This document (EN ISO 8565:2011) has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys“ in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of which is held by BSI. This

11、 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 January 2012, and conflicting national standards shall be withdrawn at the latest by January 2012. Attention is drawn to the possibility that some of th

12、e elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 8565:1995. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the f

13、ollowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, S

14、lovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 8565:2011 has been approved by CEN as a EN ISO 8565:2011 without any modification. BS EN ISO 8565:2011ISO 8565:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 S

15、cope1 2 Normative references1 3 Requirements for test specimens1 4 Atmospheric corrosion test sites 4 5 Test site characterization .6 6 Operating conditions 7 7 Test procedure.8 8 Test report8 Annex A (normative) Environmental factors characterizing atmospheric exposure conditions .10 Bibliography11

16、 BS EN ISO 8565:2011ISO 8565:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technica

17、l 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 the work. ISO collaborates closely wit

18、h the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Inter

19、national 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 bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may

20、 be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8565 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys. This second edition cancels and replaces the first edition (ISO 8565:1992), which has been techn

21、ically revised. BS EN ISO 8565:2011ISO 8565:2011(E) ISO 2011 All rights reserved vIntroduction Corrosion testing under atmospheric exposure conditions is carried out in order to obtain data on the corrosion resistance of metals, alloys1), metallic and other inorganic coatings in atmospheric environm

22、ents, to evaluate the type of corrosion of particular metals, and to obtain data for corrosivity determination and estimation. It involves exposure of the specimens to the action of atmospheric environments at the test sites, and periodic checking of the test specimens. It does not cover service cor

23、rosion 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 tests cannot be used to predict service performance e

24、xactly, but do provide an approximate guidance to service performance. 1) Hereinafter referred to as “metals”. BS EN ISO 8565:2011BS EN ISO 8565:2011INTERNATIONAL STANDARD ISO 8565:2011(E) ISO 2011 All rights reserved 1Metals and alloys Atmospheric corrosion testing General requirements 1 Scope This

25、 International Standard establishes general requirements for stationary corrosion testing of metals and metallic and other inorganic coatings under atmospheric conditions carried out in the open air or under shelters. It can also be applied for testing of complex specimens and assemblies of metallic

26、 materials. 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 4226, Air

27、quality General aspects Units of measurement ISO 8044, Corrosion of metals and alloys Basic terms and definitions ISO 8407, Corrosion of metals and alloys Removal of corrosion products from corrosion test specimens ISO 9169, Air quality Definition and determination of performance characteristics of

28、an automatic measuring system ISO 9223, Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation ISO 9225, Corrosion of metals and alloys Corrosivity of atmospheres Measurement of environmental parameters affecting corrosivity of atmospheres ISO 9226, Co

29、rrosion of metals and alloys Corrosivity of atmospheres Determination of corrosion rate of standard specimens for the evaluation of corrosivity ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rating of test specimens and manufactured articles

30、subjected to corrosion tests 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 preferred type as they can be readily weighed and measured, and their simple shape facilitates attachment to test frames. A conveni

31、ent specimen size is 150 mm 100 mm. Specimens may be of different size provided that they can be accurately evaluated. The specimen thickness shall be adequate to ensure that the specimens will survive the intended test period. The BS EN ISO 8565:2011ISO 8565:2011(E) 2 ISO 2011 All rights reservedsp

32、ecimen 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 specimens should be as large as possible, in any cas

33、e not less than 50 cm2(5 cm 10 cm). If the coated articles used are smaller than 50 cm2in 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 with those obtained on specially prepared test speci

34、mens 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 only corrosion of the outside surface is of interest. Complex specimens, suc

35、h as assemblies, may contain crevices, water traps, welded joints and dissimilar 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 wit

36、h welded joints Atmospheric corrosion tests on welded joints are intended to reveal any tendency for preferential corrosion in the weld 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

37、the test specimen, parallel to its long side (preferred position), or perpendicular. 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 necessa

38、ry to cut specimens from larger pieces of 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). S

39、urface damage can be avoided with care, whilst 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

40、be compared with service performance, it is 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

41、 organic solvents or alkaline degreasing fluids 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. For metallic and other inorganic coatings, it is absolutely

42、necessary to avoid cleaning methods which may attack the surface of 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 The test

43、specimens may be marked in such a 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. BS EN ISO

44、 8565:2011ISO 8565:2011(E) ISO 2011 All rights reserved 3Methods suggested for marking are different. The test specimens may be marked with appropriate numbers by stamping. For metallic coatings, the preferred method is positional notch coding before the protective coating is applied. Other marking

45、procedures can be used, provided that the requirements of legibility and durability are met. The area affected by marking shall be minimized. The establishment of a reliable map of specimen identity, exposure data and location on the exposure frame is recommended. 3.5 Number of specimens The number

46、of test specimens of each type used in a given exposure shall not be less than three for each exposure time interval. Three specimens should suffice for simple comparative test programmes. However, for more complex programmes, more specimens will be needed, according to the statistical requirements.

47、 3.6 Control and reference specimens 3.6.1 General It is desirable that extra specimens be included in the test programme, in order to fulfil various requirements of control and reference. 3.6.2 Control specimens Control specimens are replicates of exposed test specimens which are stored under non-c

48、orrosive conditions (see 3.7). They may be used to determine changes in physical and mechanical properties as a result of exposure of the specimens. 3.6.3 Reference specimens When testing new or modified materials, specimens of the original (known) material are used for comparison purposes and expos

49、ed together with the test specimens. 3.7 Storage During storage of the test specimens before exposure, and during storage of control specimens, care shall be taken to avoid mechanical damage and contact with other specimens. A room with a controlled temperature and a relative humidity of 65 % or less shall be used for storage purposes. Particularly sensitive specimens shall be stored in a desiccator or sealed in plastic bags with desiccant. 3.8 Specimen data records For each series of test specimens, records of data