DIN EN ISO 9223-2012 Corrosion of metals and alloys - Corrosivity of atmospheres - Classification determination and estimation (ISO 9223 2012) German version EN ISO 9223 2012《金属和合金.pdf

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1、May 2012Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.

2、060!$|0/“1891312www.din.deDDIN EN ISO 9223Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation (ISO 9223:2012)English translation of DIN EN ISO 9223:2012-05Korrosion von Metallen und Legierungen Korrosivitt von Atmosphren Klassifizierung, Bestimmung

3、und Abschtzung (ISO 9223:2012)Englische bersetzung von DIN EN ISO 9223:2012-05Corrosion des mtaux et alliages Corrosivit des atmosphres Classification, dtermination et estimation (ISO 9223:2012)Traduction anglaise de DIN EN ISO 9223:2012-05Together withDIN EN ISO 9225:2012-05 andDIN EN ISO 9226:2012

4、-05supersedesDIN EN 12500:2000-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.DIN EN ISO 9224:2012-05,Document comprises 24 pages06.12 DIN EN ISO 9223:2012-05 2 A comma is used as the decimal marker. National foreword This standard has been prepared by

5、 Technical Committee ISO/TC 156 “Corrosion of metals and alloys” (Secretariat: SAC, China) and has been adopted as EN ISO 9223:2012 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom) within the scope of the Agreement on technical cooperation

6、between ISO and CEN (Vienna Agreement). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-01-71 AA Korrosion und Korrosions-schutz. The DIN Standards corresponding to the International Stan

7、dards referred to in this document are as follows: ISO 8044 DIN EN ISO 8044 ISO 9224 DIN EN ISO 9224 ISO 9225 DIN EN ISO 9225 ISO 9226 DIN EN ISO 9226 ISO 11303 DIN EN ISO 11303 ISO 11844-1 DIN EN ISO 11844-1 ISO 11844-2 DIN EN ISO 11844-2 ISO 11844-3 DIN EN ISO 11844-3 Amendments This standard diff

8、ers from DIN EN 12500:2000-12 as follows: a) the specifications are now given in four standards (DIN EN ISO 9223, DIN EN ISO 9224, DIN EN ISO 9225 and DIN EN ISO 9226); b) the classification of corrosivity has been extended by category CX (extreme) which exceeds category C5 (very high); c) dose-resp

9、onse functions have been introduced allowing the estimation of the corrosion loss of carbon steel, copper, zinc and aluminium from environmental data or information on environmental conditions and exposure situations; d) a density of 7,86 g/cm3 instead of 7,88 g/cm3 is now the basis for the calculat

10、ion of the corrosion loss of carbon steel; e) the specifications have been updated to reflect the current state of technology; f) the standard has been editorially revised. Previous editions DIN EN 12500: 2000-12 DIN EN ISO 9223:2012-05 3 National Annex NA (informative) Bibliography DIN EN ISO 8044,

11、 Corrosion of metals and alloys Basic terms and definitions DIN EN ISO 9224, Corrosion of metals and alloys Corrosivity of atmospheres Guiding values for the corrosivity categories DIN EN ISO 9225, Corrosion of metals and alloys Corrosivity of atmospheres Measurement of environ-mental parameters aff

12、ecting corrosivity of atmospheres DIN EN ISO 9226, Corrosion of metals and alloys Corrosivity of atmospheres Determination of corrosion rate of standard specimens for the evaluation of corrosivity DIN EN ISO 11303, Corrosion of metals and alloys Guidelines for selection of protection methods against

13、 atmospheric corrosion DIN EN ISO 11844-1, Corrosion of metals and alloys Classification of low corrosivity of indoor atmospheres Part 1: Determination and estimation of indoor corrosivity DIN EN ISO 11844-2, Corrosion of metals and alloys Classification of low corrosivity of indoor atmospheres Part

14、 2: Determination of corrosion attack in indoor atmospheres DIN EN ISO 11844-3, Corrosion of metals and alloys Classification of low corrosivity of indoor atmos-pheres Part 3: Measurement of environmental parameters affecting indoor corrosivity DIN EN ISO 9223:2012-05 4 This page is intentionally bl

15、ank EN ISO 9223 February 2012 ICS 77.060 Supersedes EN 12500:2000English Version Corrosion of metals and alloys - Corrosivity of atmospheres - Classification, determination and estimation (ISO 9223:2012) Corrosion des mtaux et alliages - Corrosivit des atmosphres - Classification, dtermination et es

16、timation (ISO 9223:2012) Korrosion von Metallen und Legierungen - Korrosivitt von Atmosphren - Klassifizierung, Bestimmung und Abschtzung (ISO 9223:2012) This European Standard was approved by CEN on 22 January 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which sti

17、pulate 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 CEN-CENELEC Management Centre or to any CEN member. This European

18、 Standard exists 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are th

19、e national standards bodies of 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, S

20、witzerland, Turkey and United Kingdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 9223:2012: EEUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONE

21、UROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM Contents Page Foreword . 3 Introduction . 4 1 Scope . 6 2 Normative references 6 3 Terms and definitions 7 4 Symbols and abbreviated terms . 7 4.1 Symbols 7 4.2 Abbreviated terms 8 5 Category of corrosivity of the atmosph

22、ere . 8 6 Classification of corrosivity of the atmosphere 8 7 Corrosivity determination based on corrosion rate measurement of standard specimens 9 8 Corrosivity estimation based on environmental information 9 8.1 Corrosivity estimation General 9 8.2 Normative corrosivity estimation based on calcula

23、ted first-year corrosion losses . 10 8.3 Informative corrosivity estimation based on description of exposure conditions . 11 Annex A (informative) Sources of uncertainty associated with the determination and estimation of atmospheric corrosivity . 12 Annex B (informative) Characterization of the atm

24、osphere in relation to its corrosivity . 14 Annex C (informative) Description of typical atmospheric environments related to the estimation of corrosivity categories 18 Bibliography 20 2DIN EN ISO 9223:2012-05 EN ISO 9223:2012 (E) Foreword This document (EN ISO 9223:2012) has been prepared by Techni

25、cal 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 European Standard shall be given the status of a national standard, either by publication of an identical

26、 text or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held respon

27、sible for identifying any or all such patent rights. This document supersedes EN 12500:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,

28、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, Turkey and the United Kingdom. Endorsement notice The text of IS

29、O 9223:2012 has been approved by CEN as a EN ISO 9223:2012 without any modification. “”3DIN EN ISO 9223:2012-05 EN ISO 9223:2012 (E) Introduction Metals, alloys and metallic coatings can suffer atmospheric corrosion when their surfaces are wetted. The nature and rate of the attack depends upon the p

30、roperties of surface-formed electrolytes, particularly with regard to the level and type of gaseous and particulate pollutants in the atmosphere and to the duration of their action on the metallic surface. The character of the corrosion attack and the corrosion rate are consequences of the corrosion

31、 system, which comprises the metallic materials, the atmospheric environment, technical parameters and operation conditions. The corrosivity category is a technical characteristic which provides a basis for the selection of materials and protective measures in atmospheric environments subject to the

32、 demands of the specific application, particularly with regard to service life. Data on the corrosivity of the atmosphere are essential for the development and specification of optimized corrosion protection for manufactured products. The corrosivity categories are defined by the first-year corrosio

33、n effects on standard specimens as specified in ISO 9226. The corrosivity categories can be assessed in terms of the most significant atmospheric factors influencing the corrosion of metals and alloys. The measurement of relevant environmental parameters is specified in ISO 9225. The ways of determi

34、ning and estimating the corrosivity category of a given location according to this International Standard and the relationships among them are presented in Figure 1. It is necessary to distinguish between corrosivity determination and corrosivity estimation. It is also necessary to distinguish betwe

35、en corrosivity estimation based on application of a dose-response function and that based on comparison with the description of typical atmospheric environments. This International Standard does not take into consideration the design and mode of operation of the product, which can influence its corr

36、osion resistance, since these effects are highly specific and cannot be generalized. Steps in the choice of optimized corrosion protection measures in atmospheric environments are defined in ISO 11303. 4DIN EN ISO 9223:2012-05 EN ISO 9223:2012 (E) Figure 1 Classification of atmospheric corrosivity 5

37、DIN EN ISO 9223:2012-05 EN ISO 9223:2012 (E) 1 Scope This International Standard establishes a classification system for the corrosivity of atmospheric environments. It defines corrosivity categories for the atmospheric environments by the first-year corrosion rate of standard specimens, gives dose-

38、response functions for normative estimation of the corrosivity category based on the calculated first-year corrosion loss of standard metals, and makes possible an informative estimation of the corrosivity category based on knowledge of the local environmental situation. This International Standard

39、specifies the key factors in the atmospheric corrosion of metals and alloys. These are the temperature-humidity complex, pollution by sulfur dioxide and airborne salinity. Temperature is also considered an important factor for corrosion in areas outside the temperate macroclimatic zone. The temperat

40、ure-humidity complex can be evaluated in terms of time of wetness. Corrosion effects of other pollutants (ozone, nitrogen oxides, particulates) can influence the corrosivity and the evaluated one-year corrosion loss, but these factors are not considered decisive in the assessment of corrosivity acco

41、rding to this International Standard. This International Standard does not characterize the corrosivity of specific service atmospheres, e.g. atmospheres in chemical or metallurgical industries. The classified corrosivity categories and introduced pollution levels can be directly used for technical

42、and economical analyses of corrosion damage and for a rational choice of corrosion protection measures. 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

43、latest edition of the referenced document (including any amendments) applies. ISO 8044, Corrosion of metals and alloys Basic terms and definitions ISO 9224, Corrosion of metals and alloys Corrosivity of atmospheres Guiding values for the corrosivity categories ISO 11844-1, Corrosion of metals and al

44、loys Classification of low corrosivity of indoor atmospheres Part 1: Determination and estimation of indoor corrosivity ISO 11844-2, Corrosion of metals and alloys Classification of low corrosivity of indoor atmospheres Part 2: Determination of corrosion attack in indoor atmospheres 6DIN EN ISO 9223

45、:2012-05 EN ISO 9223:2012 (E) ISO 11844-3, Corrosion of metals and alloys Classification of low corrosivity of indoor atmospheres Part 3: Measurement of environmental parameters affecting indoor corrosivity 3 Terms and definitions For the purposes of this document, the terms and definitions given in

46、 ISO 8044 and the following apply. 3.1 corrosivity of atmosphere ability of the atmosphere to cause corrosion in a given corrosion system 3.2 category of corrosivity of atmosphere standardized rating of corrosivity of atmosphere in relation to the one-year corrosion effect 3.3 type of atmosphere cha

47、racterization of the atmosphere on the basis of appropriate classification criteria other than corrosivity or of complementary operation factors EXAMPLE Rural, urban, industrial, marine, chemical, etc. 3.4 temperature-humidity complex combined effect of temperature and relative humidity on the corro

48、sivity of the atmosphere 3.5 time of wetness period when a metallic surface is covered by adsorptive and/or liquid films of electrolyte to be capable of causing atmospheric corrosion 3.6 pollution level numbered rank based on quantitative measurements of specific chemically active substances, corrosive gases or suspended particles in the air (both natural and the result of human activity) that are different from the normal components of the air 3.7 category of location conven