EN ISO 11130-2018 en Corrosion of metals and alloys - Alternate immersion test in salt solution.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Corrosion of metals and alloys - Alternate immersion test in salt solutionBS EN ISO 11130:2018National forewordThis British Standard is the UK implementation of EN ISO 11130:2018. It is identical to ISO 11130:2017. It s

2、upersedes BS EN ISO 11130:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/8, Corrosion of metals and alloys.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purpor

3、t to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 95326 2ICS 77.060Compliance with a British Standard cannot confer immunity from legal obligations.T

4、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 11130:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 11130March 2018ICS 77.060 S

5、upersedes EN ISO 11130:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 11130:2018: EAll rights of exploitation in any form and by any means reserved worldwi

6、de for CEN national MembersCorrosion of metals and alloys - Alternate immersion test in salt solution (ISO 11130:2017)Corrosion des mtaux et alliages - Essai en immersions alternes en solution saline (ISO 11130:2017)Korrosion von Metallen und Legierungen - Wechseltauchprfung in Salzlsung (ISO 11130:

7、2017)This European Standard was approved by CEN on 21 November 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographica

8、l 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 official versions (English, French, German). A version in any other language made by translation under the responsibility of

9、 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 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Mace

10、donia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 11130:2018 (E)European forewordThis document

11、 (EN ISO 11130:2018) 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, including for corrosion protection and corrosion testing of metals and alloys” the secretariat of whi

12、ch 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 September 2018, and conflicting national standards shall be withdrawn at the latest by September 2018.Attention is drawn to the po

13、ssibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 11130:2010.According to the CEN-CENELEC Internal Regulations, the national standards organisations

14、 of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N

15、etherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 11130:2017 has been approved by CEN as EN ISO 11130:2018 without any modification.2BS EN ISO 11130:2018ISO 11130:2017Foreword ivIntro

16、duction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Test solution 25.1 General . 25.2 Preparation 26 Apparatus . 26.1 General . 26.2 Materials of construction . 36.3 Test specimen holders 36.4 Air circulation 37 Test specimens 38 Procedure. 48.1 Test conditions 48.2

17、 Immersion . 49 Cleaning of test specimens . 410 Assessment of results 511 Test report . 5Annex A (informative) Suggested test solutions . 7Annex B (informative) Suitable apparatus for alternate immersion tests in salt solution .10Bibliography .12 ISO 2017 All rights reserved iiiContents PageBS EN I

18、SO 11130:2018ISO 11130:2017ForewordISO (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 technical committees. Each member body interested

19、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 with the International Electrotechnical Commi

20、ssion (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents sh

21、ould be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for i

22、dentifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the conv

23、enience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Tec

24、hnical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.This third edition cancels and replaces the second edition (ISO 11130:2010), which has been technically revised with the fo

25、llowing changes: harmonization with ISO 9227; revision of the temperature and relative humidity of drying conditions.iv ISO 2017 All rights reservedBS EN ISO 11130:2018ISO 11130:2017IntroductionCorrosion of metals is influenced by factors which can vary significantly with environmental conditions. T

26、herefore, corrosion resistance determined for metals during alternate immersion testing as described in this document can vary greatly with the test solution selected, the temperature during immersion and the temperature and humidity during the drying periods of the test.Consequently, the result of

27、an alternate immersion corrosion test is not taken as an indication of the corrosion resistance of the metal tested in all the different service environments where the metal can be used.Nevertheless, results obtained by the method described in this document can indicate the relative corrosion resist

28、ance of different metals under in-service conditions, in particular when the service environment is similar to the test solution selected. The method can also be used to test metals under an applied tensile stress. ISO 2017 All rights reserved vBS EN ISO 11130:2018This page deliberately left blankCo

29、rrosion of metals and alloys - Alternate immersion test in salt solution1 ScopeThis document specifies a method for assessing the corrosion resistance of metals by an alternate immersion test in salt solution, with or without applied stress.The test is particularly suitable for quality control durin

30、g the manufacture of metals including aluminium alloys and ferrous materials, and also for assessment purposes during alloy development.Depending upon the chemical composition of the test solution, the test can be used to simulate the corrosive effects of marine splash zones, de-icing fluids and aci

31、d salt environments.The term “metal” as used in this document includes metallic materials with or without corrosion protection.This document is applicable to metals and their alloys, certain metallic coatings (anodic and cathodic with respect to the substrate), certain conversion coatings, certain a

32、nodic oxide coating, and organic coatings on metals.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the l

33、atest edition of the referenced document (including any amendments) applies.ISO 8044, Corrosion of metals and alloys Basic terms and definitions3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8044 apply.ISO and IEC maintain terminological databases fo

34、r use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 PrincipleThe test consists of the immersion of a test specimen, stressed in accordance with ISO 7539-1 or unstressed, in a

35、 salt solution, followed by withdrawal and a period of drying.The immersion and drying cycle is repeated at a given frequency for a given period. The extent of attack is then evaluated. For many materials, this provides a more severe corrosion test than simple continuous immersion.INTERNATIONAL STAN

36、DARD ISO 11130:2017 ISO 2017 All rights reserved 1BS EN ISO 11130:2018ISO 11130:20175 Test solution5.1 GeneralDuring the analysis, unless otherwise stated, use only reagents of recognized analytical grade and distilled or deionized water or water of equivalent purity.The test solution shall be prepa

37、red in accordance with the prescribed specification. Otherwise, the solution used should be the one most appropriate to the intended service conditions. Details of a neutral salt solution that is suitable for simulating the corrosive effect of a marine environment are given in 5.2.Details of three o

38、ther test solutions suitable for simulating salt-based de-icing liquid, acid salt conditions and ocean water are given in Annex A.5.2 PreparationThe neutral salt solution is prepared by dissolving a sufficient mass of sodium chloride in water to give a concentration of 35 g/l 1 g/l. The water used s

39、hall have a conductivity not higher than 2 mS/m (equal to 20 S/cm) at 25 C 2 C.The sodium chloride shall contain a mass fraction of the heavy metals of copper (Cu), nickel (Ni) and lead (Pb) in total less than 0,005 %. It shall not contain a mass fraction of sodium iodide more than 0,1 % and a mass

40、fraction of total impurities more than 0,5 %, calculated for dry salt. Sodium chloride with anti-caking agents should not be used, because such agents may act as corrosion inhibitors or accelerators.NOTE A useful sodium chloride salt grade is a grade named Ph. Eur/USP or JIS, ACS.Prior to use, check

41、 the pH of the salt solution using electrometric measurement. Measurements of pH shall be done using electrodes suitable for measuring pH in weakly buffered sodium chloride solutions in deionized water. Make any necessary corrections by adding hydrochloric acid, sodium hydroxide or sodium bicarbonat

42、e solution of analytical grade.The volume of the test solution shall be defined by the specification. If no specification is available, it is recommended that the volume should be not less than 3 l per square decimetre of test specimen area.6 Apparatus6.1 GeneralThe apparatus shall include the follo

43、wing components. A suitable system designed for the automatic, continuous performance of complete cycles of alternate immersion and withdrawal of the test specimens. This system shall provide uninterrupted operation throughout the duration of the test (see 8.1). Each test specimen shall be connected

44、 to the system using suitable insulating material. One or more specimen cabinet for the test solution. Only one kind of metal, alloy or coating shall be immersed in each specimen cabinet. Replicate specimens can share the same specimen cabinet.The system shall be designed such that the time taken fo

45、r full immersion or withdrawal of each specimen is not more than 2 min.NOTE Suitable apparatus for conducting alternate immersion tests in salt solution are illustrated schematically in Annex B.2 ISO 2017 All rights reservedBS EN ISO 11130:2018ISO 11130:20176.2 Materials of construction6.2.1 Materia

46、ls of construction that come into contact with the test solution shall be such that they are not affected by the corrodent to the extent that they can cause contamination of the solution and change its corrosivity.6.2.2 Use of inert materials is recommended where feasible.6.2.3 Metallic construction

47、 materials shall be selected from metals or alloys that are corrosion-resistant to the test environment or shall be protected with a suitable corrosion-resistant coating that also satisfies the conditions given in 6.2.1.6.3 Test specimen holders6.3.1 Test specimen holders shall be designed to insula

48、te electrically the test specimens from each other and from any other bare metal. When this is not possible, as in the case of certain stressing bolts or jigs, the bare metal in contact with the specimen shall be isolated from the corrodent by suitable insulating materials. If a protective coating i

49、s used, it shall be of a type that will not leach inhibiting or accelerating ions or protective oils over the non-coated portions of the specimen. In particular, coatings containing chromates shall be avoided.6.3.2 The shape and form of test specimen supports and holders shall be such that they avoid, as much as possible, any interference of free contact of the test specimen with the salt solution, they do not obstruct air flow over the test specimen, thereby retarding the drying rate, and they do not retain a pool of solution in contact