EN ISO 11130-2010 en Corrosion of metals and alloys - Alternate immersion test in salt solution《金属与合金的腐蚀 盐溶液中的交替浸没试验》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 11130:2010Corrosion of metals and alloys Alternate immersion test insalt solution (ISO 11130:2010)BS EN ISO 11130:2010 BRITISH STANDARDNational forewordThis British Sta

2、ndard is the UK implementation of EN ISO 11130:2010. It supersedes BS EN ISO 11130:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/NFE/8, Corrosion of metals and alloys.A list of organizations represented on this committee can beobtained on req

3、uest to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 61117 9ICS 77.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standar

4、d was published under the authority of theStandards Policy and Strategy Committee on 31 July 2010Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11130 June 2010 ICS 77.060 Supersedes EN ISO 11130:1999English Version Corrosion of metals an

5、d alloys - Alternate immersion test in salt solution (ISO 11130:2010) Corrosion des mtaux et alliages - Essai en immersions alternes en solution saline (ISO 11130:2010) Korrosion von Metallen und Legierungen - Wechseltauchprfung in Salzlsung (ISO 11130:2010) This European Standard was approved by CE

6、N on 12 June 2010. 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 bibliographical references concerning such national standards m

7、ay be obtained on application to the CEN 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 a CEN member into its own language and notified to the

8、CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta

9、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploi

10、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11130:2010: EBS EN ISO 11130:2010EN ISO 11130:2010 (E) 3 Foreword This document (EN ISO 11130:2010) has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys“ in collaboration w

11、ith 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 text or by endorsement, at the latest by December 2010, and conflicting n

12、ational standards shall be withdrawn at the latest by December 2010. 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 for identifying any or all such patent rights. This document sup

13、ersedes EN ISO 11130:1999. 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, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece

14、, 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 11130:2010 has been approved by CEN as a EN ISO 11130:2010 without any m

15、odification. BS EN ISO 11130:2010ISO 11130:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Principle2 4 Test solution 2 5 Apparatus.3 6 Procedure.4 6.1 Test conditions 4 6.2 Test specimens4 6.3 Test reagent .5 7 Calibration of the t

16、est facility .5 8 Cleaning of test specimens5 9 Assessment of results 5 10 Test report6 Annex A (informative) Suggested test solutions.7 Annex B (informative) Suitable apparatus for alternate immersion tests in salt solution 10 Bibliography14 BS EN ISO 11130:2010ISO 11130:2010(E) iv ISO 2010 All rig

17、hts 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 technical committees. Each member body interested in a subject f

18、or 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 Commission (IEC) on

19、 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 International Standards adopted by the technical committees a

20、re 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 be the subject of patent rights. ISO shall not be held

21、responsible for identifying any or all such patent rights. ISO 11130 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys. This second edition cancels and replaces the first edition (ISO 11130:1999), of which Annex B has been technically revised. BS EN ISO 11130:2010ISO 111

22、30:2010(E) ISO 2010 All rights reserved vIntroduction Corrosion of metals is influenced by factors which can vary significantly with environmental conditions. Therefore, corrosion resistance determined for metals during alternate immersion testing as described in this International Standard can vary

23、 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 an alternate immersion corrosion test is not taken as an indication of the corrosion resistance of the metal tested in all th

24、e different service environments where the metal can be used. Nevertheless, results obtained by the method described in this International Standard can indicate the relative corrosion resistance of different metals under in-service conditions, in particular when the service environment is similar to

25、 the test solution selected. The method can also be used to test metals under an applied tensile stress. BS EN ISO 11130:2010BS EN ISO 11130:2010INTERNATIONAL STANDARD ISO 11130:2010(E) ISO 2010 All rights reserved 1Corrosion of metals and alloys Alternate immersion test in salt solution 1 Scope Thi

26、s International Standard 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 during the manufacture of metals including aluminium alloys and ferrous

27、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 acid salt environments. The term “metal” as used in this Internationa

28、l Standard includes metallic materials with or without corrosion protection. The alternate immersion test applies to metals and their alloys, certain metallic coatings (anodic and cathodic with respect to the substrate), certain conversion coatings, certain anodic oxide coating, and organic coatings

29、 on metals. This International Standard is not applicable to stainless steel. 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 refe

30、renced document (including any amendments) applies. ISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation system ISO 4628-2, Paints and varnish

31、es Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 2: Assessment of degree of blistering ISO 4628-3, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and o

32、f intensity of uniform changes in appearance Part 3: Assessment of degree of rusting ISO 4628-4, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 4: Assessment of degree of cracking BS EN IS

33、O 11130:2010ISO 11130:2010(E) 2 ISO 2010 All rights reservedISO 4628-5, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 5: Assessment of degree of flaking ISO 7539-1, Corrosion of metals an

34、d alloys Stress corrosion testing Part 1: General guidance on testing procedures ISO 8407, Corrosion of metals and alloys Removal of corrosion products from corrosion test specimens ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rating of tes

35、t specimens and manufactured articles subjected to corrosion tests 3 Principle The test consists of the immersion of a test specimen, stressed in accordance with ISO 7539-1 or unstressed, in a salt solution, followed by withdrawal and a period of drying. The immersion/drying cycle is repeated at a g

36、iven 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. 4 Test solution 4.1 General. During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and

37、distilled or demineralized water or water of equivalent purity. The test solution shall be prepared in accordance with the prescribed specification. Otherwise, the solution used should be the one most appropriate to the intended service conditions. Subclause 4.2 gives details of a neutral salt solut

38、ion that is suitable for simulating the corrosive effect of a marine environment. Details of three other test solutions suitable for simulating salt-based de-icing liquid, acid salt conditions and ocean water are given in Annex A. 4.2 Preparation. The neutral salt solution is prepared by dissolving

39、a sufficient mass of sodium chloride in water to give a concentration of 35 gL1 1 gL1. The water used shall have a conductivity not higher than 2 mSm1(equal to 20 Scm1) at 25 C 2 C. The maximum allowable impurity content in the sodium chloride solution shall be as given in Table 1: Table 1 Maximum i

40、mpurity content in the sodium chloride solution Impurity Maximum permissible mass fraction % Remarks Copper 0,001 Nickel 0,001 Determined by atomic absorption spectrophotometry or another method of similar accuracy Sodium iodide 0,1 Total 0,5 Calculated for dry salt Prior to use, check the pH of the

41、 salt solution using electrometric measurement at 25 C 2 C or in routine checks, with a short-range pH paper which can be read in increments of 0,3 pH units or less. If the pH value determined is outside the range of 6,0 to 7,0, adjustments shall be made by adding dilute hydrochloric acid or sodium

42、hydroxide to the salt solution. BS EN ISO 11130:2010ISO 11130:2010(E) ISO 2010 All rights reserved 3The volume of the test solution should be defined by the product specification. If no specification is available, it is recommended that the volume should be not less than 3 L per decimetre square of

43、test specimen area. 5 Apparatus 5.1 General. The apparatus shall include the following 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 th

44、roughout the duration of the test (see 6.1). Each test specimen shall be connected to the system using suitable insulating material. One or more glass or plastic containers for the reagent. Only one kind of metal, alloy or coating should be immersed in each container. Replicate specimens can share t

45、he same container. The system should be designed such that the time taken for full immersion or withdrawal of each specimen is not more than 2 min. NOTE Suitable apparatus for conducting alternate immersion tests in salt solution is illustrated schematically in Annex B. 5.2 Materials of construction

46、. 5.2.1 Materials 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. 5.2.2 Use of inert plastics or glass is recommended where feasible. 5.

47、2.3 Metallic construction materials shall be selected from 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 5.2.1. 5.3 Test specimen holders. 5.3.1 Test specimen holders shall be

48、designed to insulate 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 should be isolated from the corrodent by suitable insulating materials. If a p

49、rotective coating is 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. 5.3.2 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 spe