1、April 2008DEUTSCHE NORM English price group 11No part of this standard 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 77.060!$NJg“1433968www.d
2、in.deDDIN EN ISO 10062Corrosion tests in artificial atmosphere at very low concentrations ofpolluting gas(es) (ISO 10062:2006)English version of DIN EN ISO 10062:2008-04Korrosionsprfungen in knstlicher Atmosphre mit sehr niedrigen Konzentrationen vonSchadgas(en) (ISO 10062:2006)Englische Fassung DIN
3、 EN ISO 10062:2008-04SupersedesDIN EN ISO 10062:1995-05www.beuth.deDocument comprises 18 pagesDIN EN ISO 10062:2008-04 2 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 10062
4、:2008 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical Committee NA 062-01-71 AA Korrosion un
5、d Korrosions-schutz. Amendments a) Methods E and F have been added to subclause 4.1.1 “Suggested test methods”. Previous editions DIN EN ISO 10062: 1995-05 This standard differs from DIN EN ISO 10062:1995-05 as follows: EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10062 January 2008 ICS
6、77.060 Supersedes EN ISO 10062:1995English Version Corrosion tests in artificial atmosphere at very low concentrations of polluting gas(es) (ISO 10062:2006) Corrosion des mtaux et alliages - Essais de corrosion en atmosphre artificielle trs faible concentration en gaz polluants (ISO 10062:2006) Korr
7、osionsprfungen in knstlicher Atmosphre mit sehr niedrigen Konzentrationen von Schadgas(en) (ISO 10062:2006) This European Standard was approved by CEN on 29 December 2007. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europea
8、n 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English,
9、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cy
10、prus, 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. EUROPEAN COMMITTEE FOR STANDARDIZATION C
11、OMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10062:2008: EContents Page 2 DIN EN ISO 10062:2008-04 : -
12、EN ISO 10062:2008 (E) Foreword .3 Introduction 4 1 Scope .5 2 Normative references .5 3 Terms and definitions 6 4 Apparatus 6 5 Test methods .6 6 Information to be given in the relevant specification .10 7 Expression of results .11 8 Test report .11 Annex A (informative) Specifications for apparatus
13、 for corrosion tests in artificial atmospheres .12 Annex B (informative) Typical apparatus for polluting gas corrosion tests 15 Bibliography .16 Foreword 3 The text of ISO 10062:2006 has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys” of the International Organizatio
14、n for Standardization (ISO) and has been taken over as EN ISO 10062:2008 by 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
15、text or by endorsement, at the latest by July 2008, and conflicting national standards shall be withdrawn at the latest by July 2008. 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 responsible
16、 for identifying any or all such patent rights. This document supersedes EN ISO 10062:1995. 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, Cyprus, Czech Repu
17、blic, 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 the United Kingdom. Endorsement notice The text of ISO 10062:2006 has b
18、een approved by CEN as EN ISO 10062:2008 without any modifications. EN ISO 10062:2008 (E) DIN EN ISO 10062:2008-04 Introduction Products with, for example, sensitive electrical functions, may, during storage or operation in indoor locations, be affected by atmospheric corrosion dependent on climatic
19、 factors such as temperature, relative humidity, air velocity and rate of change caused by temperature and humidity. Additionally, gaseous pollutants may seriously affect the rate of corrosion, as well as the occurrence of different corrosion mechanisms. Contaminants on the surface, such as salt, du
20、st, oil and compounds liberated from plastics, may also affect the rate and mechanism of corrosion. Different corrosion-promoting gaseous pollutants dominate in different field environments: sulfur dioxide and nitrogen oxides in atmospheres influenced by combustion of fossil fuels and in traffic env
21、ironments, hydrogen sulfide in atmospheres in the vicinity of petrochemical and steel industry, decaying organic matter, stagnant waters and animal shelters, and hydrogen sulfide and chlorine compounds in the vicinity of pulp and paper industry; if chlorine is used for bleaching Those gaseous pollut
22、ants are known to act as single corrosion-promoting factors. However, in atmospheres where more than one gaseous pollutant is present, synergistic effects may be initiated. As a result, a considerable increase in the corrosion rate may occur, compared to the case when the different gaseous pollutant
23、s act as single corrosion-promoting factors. This International Standard is intended to a) define a general method using atmospheres polluted by one or more gases at very low volume fractions u106under specified conditions of temperature and relative humidity, so as to avoid condensation phenomena d
24、uring the test, b) define the test apparatus and procedure required to achieve the best possible reproducibility, c) assess performance under test conditions which accelerate corrosion; as knowledge of operating conditions proceeds, more suitable pollutants or pollutant mixtures could be used. 4 DIN
25、 EN ISO 10062:2008-04 EN ISO 10062:2008 (E) WARNING Safety rules for personnel: Handling of the gases used for testing can be hazardous and must be left to skilled chemists or conducted under their control. The test equipment must be used and maintained by skilled personnel, not only so that the tes
26、ts can be performed correctly, but also because of the hazards to health and safety that are involved. 1 Scope This International Standard specifies tests which are intended to determine the influence of one or more flowing polluting gas(es) at volume fractions less than or equal to 10-6on test samp
27、les and/or articles of metals and alloys with or without corrosion protection under determined conditions of temperature and relative humidity. These tests apply to a) metals and their alloys, b) metallic coatings (anodic and cathodic), c) metals with conversion coatings, d) metals with anodic oxide
28、 coatings, and e) metals with organic coatings. 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
29、 amendments) applies. ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 558, Conditioning and testing Standard atmospheres Definitions ISO 7384, Corrosion tests in artificial atmosphere General requirements ISO 8407, Corrosion of metals and alloys Removal of corrosion
30、products from corrosion test specimens 5 EN ISO 10062:2008 (E) DIN EN ISO 10062:2008-04 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 exposure time interval of time elapsed between the moment when the specimens are introduced into the test
31、chamber and the end of the test 3.2 test duration interval of time during which the specimens are exposed to polluting gases 4 Apparatus Special attention shall be paid to equipment design and the choice of construction materials, in order that the conditions (less than 1 C for temperature and less
32、than 3 % for relative humidity) are uniformly consistent throughout the working space, able to ensure no condensation in the test chamber, and are repeatable. The apparatus shall enable the use, singly or in mixtures, of polluting gas(es) such as SO2, H2S, Cl2and NO2up to at least the concentration
33、required, for each gas, by the test method. The important parameters are a) the materials used for the test chamber and the gas handling system, b) the geometry of the test chamber, c) the rate and pattern of the gas flow, d) the homogeneity of gas mixing, e) the incident illumination (see A.1.6) Th
34、e apparatus shall be constructed according to Annex A and shall meet its requirements. A typical apparatus for polluting-gas corrosion tests is also shown in Annex B. 5 Test methods 5.1 Test severity 5.1.1 General The test severity, to be given in the relevant specification, is defined by the type,
35、concentration and flow rate of polluting gas, the temperature, the relative humidity, and the test duration. 6 DIN EN ISO 10062:2008-04 EN ISO 10062:2008 (E) 5.1.2 Suggested test methods The method to be used depends upon the purposes of the test, the nature of the metals and alloys and the type of
36、protection to be tested. Method A Polluting gas SO2at a volume fraction of (0,5 0,1) 106Temperature and relative humidity (40 1) C and (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % is more aggressive than the condition of (25 1) C and (75 3) % RH. Either of them shal
37、l be optionally selected and be stated in the test report. Method B Polluting gas H2S at a volume fraction of (0,10 0,02) 106Temperature and relative humidity (40 1) C and (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % RH is more aggressive than the condition of (25 1
38、) C and (75 3) % RH. Either of them shall be optionally selected and be stated in the test report. Method C Polluting gas Cl2at a volume fraction of (0,02 0,005) 106Temperature and relative humidity (40 1) C and (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % RH is mor
39、e aggressive than the condition of (25 1) C and (75 3) % RH. Either of them shall be optionally selected and be stated in the test report. Method D Mixture of polluting gases SO2at a volume fraction of (0,5 0,1) 106, and H2S at a volume fraction of (0,10 0,02) 106Temperature and relative humidity (4
40、0 1) C and (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % RH is more aggressive than the condition of (25 1) C and (75 3) % RH. Either of them shall be optionally selected and be stated in the test report. 7 EN ISO 10062:2008 (E) DIN EN ISO 10062:2008-04 Method E Mixt
41、ure of polluting gases SO2at a volume fraction of (0,20 0,05) 106, and NO2at a volume fraction of (0,5 0,1) 106Temperature and relative humidity (40 1) C and (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % RH is more aggressive than the condition of (25 1) C and (75 3)
42、 % RH. Either of them shall be optionally selected and be stated in the test report. Method F Mixture of polluting gases SO2at a volume fraction of (0,5 0,1) 106, H2S at a volume fraction of (0,10 0,02) 106, and Cl2at a volume fraction of (0,02 0,005) 106Temperature and relative humidity (40 1) C an
43、d (80 5) % RH or (25 1) C and (75 3) % RH The condition of (40 1) C and (80 5) % RH is more aggressive than the condition of (25 1) C and (75 3) % RH. Either of them shall be optionally selected and be stated in the test report. NOTE 1 Since the corrosivity is different for methods A, B, C, D, E and
44、 F the result obtained by these methods are not comparable. NOTE 2 Other methods may be added in the future if required (e.g. increase in the relative humidity). 5.1.3 Test duration The test duration for each test method depends upon the purposes of the test, the nature of the metals and alloys and
45、the means of protection tested. 5.2 Treatment of the specimens prior to testing (see Clause 6) The relevant specification may require a preconditioning of specimens, for example chemical or mechanical cleaning of the surface. 5.3 Examination of the specimens prior to testing Measurements shall be ca
46、rried out as required by the relevant specification (see ISO 7384). 5.4 Filling of the test chamber The filling of the chamber by the specimens shall satisfy the following conditions: the total surface of the test specimens shall not exceed the critical level at which the concentrations of polluting
47、 gases would decrease by more than 10 % during the passage through the working space; the specimens shall be placed in the working space, as defined in the relevant specification. 8 DIN EN ISO 10062:2008-04 EN ISO 10062:2008 (E) Care shall be taken that the specimens are placed so that they do not c
48、ome into contact with one another or with the walls of the chamber, and that they do not shield one another from the test atmosphere. The specimens shall be distributed uniformly in the working space. 5.5 Procedure Two procedures for the execution of the test may be adopted, the reference method and
49、 the simplified method. 5.5.1 Basis for calculation 5.5.1.1 Exposure time: a) For the reference method, exposure time corresponds to t1to t3(see Figure 1). b) For the simplified method, exposure time corresponds to t2to t3(see Figure 2). 5.5.1.2 Test duration: a) For the reference method, test duration corresponds to t2to t3(see Figure 1). b) For the simplified me
