1、May 2012 Translation by DIN-Sprachendienst.English price group 13No 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!$|03“1891316www.din.deDDIN EN ISO 9225Corrosion of metals and alloys Corrosivity of atmospheres Measurement of environmental parameters affecting corrosivity ofatmospheres (ISO 9225:2012)English translation of DIN EN ISO 9225:2012-05Korrosion von Metallen und Legierungen Korrosivitt von Atmosph
3、ren Messung der die Korrosivitt von Atmosphren beeinflussenden Umweltparameter(ISO 9225:2012)Englische bersetzung von DIN EN ISO 9225:2012-05Corrosion des mtaux et alliages Corrosivit des atmosphres Mesurage des paramtres environnementaux affectant la corrosivit des atmosphres(ISO 9225:2012)Traducti
4、on anglaise de DIN EN ISO 9225:2012-05Together with DIN EN ISO9223:2012-05,DIN EN ISO 9224:2012-05 andDIN EN ISO 9226:2012-05supersedesDIN EN 12500:2000-12www.beuth.deDocument comprises 28 pagesIn case of doubt, the German-language original shall be considered authoritative.04.12 DIN EN ISO 9225:201
5、2-05 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys” (Secretariat: SAC, China) and has been adopted as EN ISO 9225:2012 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatin
6、gs” (Secretariat: BSI, United Kingdom) within the scope of the Agreement on technical cooperation 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 062-0
7、1-71 AA Korrosion und Korrosionsschutz. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 8565 DIN EN ISO 8565 ISO 9223 DIN EN ISO 9223 ISO 11844-3 DIN EN ISO 11844-3 Amendments This standard differs from DIN EN 12500:2000-12 as follows:
8、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 specifications have been updated to reflect the current state of technology; c) the standard has been editorially revised. Previous editions DIN EN 12500: 2000-12 Nat
9、ional Annex NA (informative) Bibliography DIN EN ISO 8565, Metals and alloys Atmospheric corrosion testing General requirements DIN EN ISO 9223, Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation DIN EN ISO 11844-3, Corrosion of metals and alloys C
10、lassification of low corrosivity of indoor atmospheres Part 3: Measurement of environmental parameters affecting indoor corrosivity EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9225 February 2012 ICS 77.060 Supersedes EN 12500:2000English Version Corrosion of metals and alloys - Corrosiv
11、ity of atmospheres - Measurement of environmental parameters affecting corrosivity of atmospheres (ISO 9225:2012) Corrosion des mtaux et alliages - Corrosivit des atmosphres - Mesurage des paramtres environnementaux affectant la corrosivit des atmosphres (ISO 9225:2012) Korrosion von Metallen und Le
12、gierungen - Korrosivitt von Atmosphren - Messung der die Korrosivitt von Atmosphren beeinflussenden Umweltparameter (ISO9225:2012) This European Standard was approved by CEN on 22 January 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
13、or 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 Standard exists in thr
14、ee 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 the national standards bo
15、dies 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, Switzerland, Turkey and
16、United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG 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 9225
17、:2012: EContents Page Foreword .3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Principle .5 4 Humidity and temperature parameters . 6 4.1 Relative humidity . 6 4.2 Temperature . 6 5 Airborne contaminants . 6 5.1 Principle . 6 5.2 Placement of measurement equipment 7 5.3 Measurement methods
18、and duration 7 Annex A (normative) Determination of sulfur dioxide deposition rate on lead dioxide sulfation plates 10 Annex B (normative) Determination of sulfur dioxide deposition rate on lead dioxide sulfation cylinder . 13 Annex C (normative) Determination of sulfur dioxide deposition rate on al
19、kaline surfaces 16 Annex D (normative) Determination of chloride deposition rate by the wet candle method 18 Annex E (normative) Determination of chloride deposition rate by dry plate method 22 Annex F (normative) Comparison of chlorides and sulfur dioxide deposition rates determined by different me
20、thods 25 Bibliography 26 DIN EN ISO 9225:2012-05 EN ISO 9225:2012 (E) 2Foreword This document (EN ISO 9225:2012) 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 secre
21、tariat of which is held by BSI. 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 August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn
22、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 responsible for identifying any or all such patent rights. This document supersedes EN 12500:2000. According to the CEN/CENELEC Internal Regulations, the national s
23、tandards organizations of the following 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, Norwa
24、y, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 9225:2012 has been approved by CEN as a EN ISO 9225:2012 without any modification. DIN EN ISO 9225:2012-05 EN ISO 9225:2012 (E) 3 Introduction The ability o
25、f an atmosphere to cause corrosion of metals and alloys is controlled by the following factors: the temperature-humidity complex and pollution. A basic requirement for the estimation of the corrosivity of atmospheres is standardized measurement of the important parameters describing the correlation
26、between the corrosion and the environmental characteristics. The methods included in this International Standard have been chosen for their easy applicability and good comparability of results. It is important to stress that the methods for estimation of the atmospheric corrosivity given in ISO 9223
27、 are based on the measurement methods described in this International Standard. DIN EN ISO 9225:2012-05 EN ISO 9225:2012 (E) 4WARNING Some of the procedures included in this International Standard entail the use of potentially hazardous chemicals. lt is emphasized that all appropriate safety precaut
28、ions should be taken. 1 Scope This International Standard specifies methods for measuring the parameters needed for corrosivity estimation used for classification of the corrosivity of atmospheres in ISO 9223. This International Standard specifies methods for the measurement of environmental paramet
29、ers for normative corrosivity estimation based on calculated first-year corrosion rates of standard metals, and informative corrosivity estimation based on characterization of the exposure environment. This International Standard does not describe the usual analytical techniques for the measured par
30、ameters since this depends on the available analytical techniques used in laboratories. Specific methods for deposition measurement of SO2and Cldeposition rates and conversional factors for comparison of different measuring methods are presented in Annexes A, B, C, D, E and F. For methods pertaining
31、 to the characterization of the atmospheric exposure site in general, see ISO 8565. 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 th
32、e referenced document (including any amendments) applies. ISO 9223, Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation ISO 11844-3, Corrosion of metals and alloys Classification of low corrosivity of indoor atmospheres Part 3: Measurement of enviro
33、nmental parameters affecting indoor corrosivity 3 Principle Different environmental parameters and their combinations affect the corrosivity of the atmosphere. Two methods for corrosivity estimation (normative and informative) are specified in ISO 9223. In general, two groups of parameters are obtai
34、ned or measured for standardized procedures of corrosivity estimation: humidity and temperature; airborne contaminants. DIN EN ISO 9225:2012-05 EN ISO 9225:2012 (E) 5 Standardized corrosivity estimation is based on information on levels of the dominating environmental parameters: the temperature-hum
35、idity complex, and pollution with SO2and airborne chlorides. Measurements of these parameters are mandatory for the purpose of corrosivity estimation. Contaminants other than SO2and Cl, such as NOx, O3, H2S, HNO3, can also exert an effect on the corrosion rate. Corrosion active components of dust de
36、posits (SO42, NO3, Cl) react with metals in the presence of humidity. These factors are considered as accompanying factors (see ISO 9223). These environmental parameters, which contribute to the effect on corrosion of standard metals in multi-pollutant situations, are not included as mandatory param
37、eters for corrosivity estimation in ISO 9223. Information on levels of these parameters can help in informative corrosivity estimation. Methods for the measurement of environmental parameters to be used specifically for the estimation of low corrosivity of indoor atmospheres (IC) are given in ISO 11
38、844-3. 4 Humidity and temperature parameters 4.1 Relative humidity Reliable long-term average values for relative humidity can often be obtained from the meteorological authorities in the country. Several types of measuring devices can be used if collection of new data for the locality is needed. Th
39、ere are several continuous measuring devices, such as hygrographs, thermohygrographs or logging hygrometers, available on the market. The period of measurement is preferably one year in order to cover seasonal variations and because the classification system is based on yearly average values. The da
40、ta shall be expressed as yearly mean values. 4.2 Temperature Reliable long-term average values for temperature can often be obtained from the meteorological authorities in the country. Several types of measuring devices can be used if collection of new data for the locality is needed. There are seve
41、ral continuous measuring devices, such as thermohygrographs or logging thermometers, available on the market. The period of measurement is preferably one year in order to cover seasonal variations and because the classification system is based on yearly average values. The data shall be expressed as
42、 yearly mean values. 5 Airborne contaminants 5.1 Principle The gas concentration or deposition rate may be measured using several techniques: continuous gas concentration measuring instruments; average gas concentration with active sampler and air pump; average gas concentration with diffusive (pass
43、ive) sampler; average deposition rate equipment. The results from concentration measurements are typically given in micrograms per cubic metre (g/m3) and, for deposition measurements, in milligrams per square metre per day mg/(m2d). DIN EN ISO 9225:2012-05 EN ISO 9225:2012 (E) 65.2 Placement of meas
44、urement equipment 5.2.1 Continuous gas concentration measurement instruments The instrument shall be located in a place that is sheltered from the rain and protected from unauthorized people. Preferably, the instrument should be placed indoors with a tube leading out to the ambient air. Polyethylene
45、 or PTFE tubing is recommended and the length of the tubing should not exceed 2 m. The inlet shall be facing down with a wider hood at the inlet to reduce the risk of sucking particulates into the tube. 5.2.2 Measurement instruments with active sampler The active sampler equipment shall be placed ac
46、cording to the same rules as the continuous gas-measuring instrument. 5.2.3 Measurement instruments with diffusive sampler The sampling device shall be placed with the open end facing downward under appropriate shelter. The air flow influences the gas diffusion in the sampler. 5.2.4 Deposition rate
47、equipment The equipment shall be sheltered from setting particles and from washing out by rain for outdoor deposition measurements. The air flow influences the deposition rate. 5.3 Measurement methods and duration 5.3.1 Continuous measurement The measurements shall preferably be carried out for one
48、year in order to record the seasonal variation of the gas pollutants. The data from continuous measuring instruments shall be recorded as monthly average values. For the corrosivity estimation, the data shall be expressed as yearly mean values. Standard instruments have detection limits in a range from 4 105volume fractions to 1
