DIN EN ISO 16701-2015 Corrosion of metals and alloys - Corrosion in artificial atmosphere - Accelerated corrosion test involving exposure under controlled conditions of humidity cyo.pdf

1、October 2015Translation 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

2、 77.060!%FF“2353598www.din.deDDIN EN ISO 16701Corrosion of metals and alloys Corrosion in artificial atmosphere Accelerated corrosion test involving exposure under controlledconditions of humidity cycling and intermittent spraying of a saltsolution (ISO 16701:2015);English version EN ISO 16701:2015,

3、English translation of DIN EN ISO 16701:2015-10Korrosion von Metallen und Legierungen Korrosion in knstlicher Atmosphre Beschleunigte Korrosionsprfungen unter zyklischer Einwirkung von Luftfeuchte undintermittierendem Versprhen einer Salzlsung unter kontrollierten Bedingungen(ISO 16701:2015);Englisc

4、he Fassung EN ISO 16701:2015,Englische bersetzung von DIN EN ISO 16701:2015-10Corrosion des mtaux et alliages Corrosion en atmosphre artificielle Essai de corrosion acclre comprenant des expositions sous conditions contrles des cycles dhumidit et des vaporisations intermittentes de solution saline(I

5、SO 16701:2015);Version anglaise EN ISO 16701:2015,Traduction anglaise de DIN EN ISO 16701:2015-10SupersedesDIN EN ISO 16701:2008-08www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 21 pages09.15 DIN EN ISO 16701:2015-10 2 A comma is used

6、as the decimal marker. National forewordThe text of this document (ISO 16701:2015) has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and alloys” (Secretariat: SAC, China) and has been adopted as EN ISO 16701:2015 by Technical Committee CEN/TC 262 “Metallic and other inorganic

7、coatings” (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 DIN-Normenausschuss Material-prfung (DIN Standards Committee Materials Testing), Working Com

8、mittee NA 062-01-77 AA Korrosionsprfverfahren. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 4628-1 DIN EN ISO 4628-1 ISO 4628-2 DIN EN ISO 4628-2 ISO 4628-4 DIN EN ISO 4628-4 ISO 4628-5 DIN EN ISO 4628-5 ISO 8407 DIN EN ISO 8407 ISO

9、9223 DIN EN ISO 9223 ISO 9227 DIN EN ISO 9227 ISO 10289 DIN EN ISO 10289 Amendments This standard differs from DIN EN ISO 16701:2008-08 as follows: a) Subclause 4.4 “Calibration” contained in the draft standard has been deleted; b) Subclause 4.2 “Spraying device” and corresponding figures have been

10、revised; c) the Note in Annex A has been deleted; d) the standard has been editorially revised. Previous editions DIN EN ISO 16701: 2008-08 DIN EN ISO 16701:2015-10 3 National Annex NA (informative) Bibliography DIN EN ISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designatio

11、n of quantity and size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation system DIN EN ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in a

12、ppearance Part 2: Assessment of degree of blistering DIN EN 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 DIN EN ISO 4628-5, Paints and var

13、nishes 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 DIN EN ISO 8407, Corrosion of metals and alloys Removal of corrosion products from corrosion test specimens DIN EN ISO 9

14、223, Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation DIN EN ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests DIN EN ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rati

15、ng of test specimens and manufactured articles subjected to corrosion test DIN EN ISO 16701:2015-10 4 This page is intentionally blank EN ISO 16701 ICS 77.060 Supersedes EN ISO 16701:2008English VersionCorrosion of metals and alloys - Corrosion in artificialatmosphere - Accelerated corrosion test in

16、volving exposureunder controlled conditions of humidity cycling and intermittentspraying of a salt solution (ISO 16701:2015)Corrosion des mtaux et alliages - Corrosion en atmosphre artificielle - Essai de corrosion acclre comprenant des expositions sous conditions contrles des cycles dhumidit et des

17、 vaporisations intermittentes de solution saline (ISO 16701:2015) Korrosion von Metallen und Legierungen - Korrosion inknstlicher Atmosphre - BeschleunigteKorrosionsprfungen unter zyklischer Einwirkung vonFeuchte und intermittierendem Versprhen einerSalzlsung unter kontrollierten Bedingungen(ISO 167

18、01:2015)This European Standard was approved by CEN on 16 April 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographica

19、l references concerning such nationalstandards 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 translationaunder the responsibility of

20、 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

21、donia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN

22、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16701:2015 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGMay 2015EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContentsPage Forew

23、ord .3 Introduction .4 1 Scope .5 2 Normative references5 3 Reagent .6 4 Apparatus 6 4.1 Climate chamber . 6 4.2 Spraying device . 7 4.3 System for forced drying . 7 5 Test objects .7 6 Procedure 8 6.1 Arrangement of the test objects . 8 6.2 Exposure conditions of test cycle 8 6.3 Duration of test 1

24、0 6.4 Treatment of test objects after test 10 7 Evaluation of results . 10 8 Test report . 11 Annex A (informative) Recommended periods of testing 12 Annex B (informative) Suitable design of test apparatus with spraying device 13 Annex C (informative) Method for evaluation of corrosivity of test 15

25、Bibliography . 17 2DIN EN ISO 16701:2015-10 EN ISO 16701:2015 (E) ForewordThis document (EN ISO 16701:2015) 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 secretaria

26、t 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 November 2015, and conflicting national standards shall be withdrawn at the latest by November 2015. Attention is drawn t

27、o 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 ISO 16701:2008. According to the CEN-CENELEC Internal Regulations, the nationa

28、l standards organizations 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, Lithua

29、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16701:2015 has been approved by CEN as EN ISO 16701:2015 without any modification. 3DIN EN ISO 16701:2015-10EN ISO

30、 16701:2015 (E)IntroductionAtmospheric corrosion of metallic materials, with or without corrosion protection, is influenced by many environmental factors, the importance of which might vary with the type of metallic material and with the type of environment. It is therefore not possible to design a

31、laboratory corrosion test in such a way that the full complexity of real in-service conditions are taken into account. Acceleration (forced conditions) as such can also have a negative impact on the correlation to field performance. Nevertheless, tests with humidity cycling and only intermittent exp

32、osure to salt solution will generally provide a better correlation to field performance than tests using continuous salt spray.This International Standard was developed in the automotive context, where the major contributor to corrosion is the use of winter time de-icing road salt in cool/cold tempe

33、rate areas around the world, here as sodium chloride compounds acting in cyclic humidity conditions. The test procedure is moderately forced by humidity and salt and intended to be applicable for quality assurance of the metals and corrosion protections typically encountered in motor vehicles. The m

34、ethod can have relevance also in other areas of application, provided representing similar climatic conditions with an influence of sodium chloride compounds.4DIN EN ISO 16701:2015-10 EN ISO 16701:2015 (E) 1 ScopeThis International Standard specifies the test method, the reagents, and the procedure

35、to be used in an accelerated atmospheric corrosion test constituting a 6 h exposure to a slightly acidified solution of 1 % NaCl twice weekly, followed by a condition of controlled humidity cycling between 95 % RH and 50 % RH at a constant temperature of 35 C.This International Standard does not spe

36、cify the dimensions of the tests specimens, the exposure period to be used for a particular product, or the interpretation of the results. Such details are provided in the appropriate product specifications.The accelerated laboratory corrosion test applies to metals and their alloys, metallic coatin

37、gs (anodic or cathodic), chemical conversion coatings, and organic coatings on metallic materials.NOTE 1 If testing low-alloy stainless steels, especially austenitic grades, according to this International Standard, there is a risk of receiving exaggerated pitting, not representative for most servic

38、e environments.NOTE 2 This International Standard is not suitable for testing of wax and oil based rust protection agents, due to the constantly elevated temperature condition of the test.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document

39、and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 4628-1, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and

40、 size of defects, and of intensity of uniform changes in appearance Part 1: General introduction and designation systemISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 2: Assessm

41、ent of degree of blisteringISO 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 crackingISO 4628-5, Paints and varnishes Evaluation of degradation of coati

42、ngs Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 5: Assessment of degree of flakingISO 8407, Corrosion of metals and alloys Removal of corrosion products from corrosion test specimensISO 10289, Methods for corrosion testing of metallic and other

43、 inorganic coatings on metallic substrates Rating of test specimens and manufactured articles subjected to corrosion tests5DIN EN ISO 16701:2015-10EN ISO 16701:2015 (E)3 ReagentA salt solution, prepared by dissolving a sufficient mass of sodium chloride in distilled or deionized water to a concentra

44、tion of 10 g l1 1 g l1. The distilled or deionized water used shall have a conductivity not higher than 2 mS m1at 25 C 2 C.The maximum permissible amounts of impurities in the sodium chloride are given in Table 1.Table 1 Maximum permissible amounts of impurities in the sodium chloride as calculated

45、for dry saltImpurityMaximum mass fraction of impurity %NoteCopper (calculated for dry salt)0,001Determined by atomic absorption spectro-photome-try or other method with similar accuracyNickel (calculated for dry salt)0,001Sodium iodide 0,1Tot al 0,5Check the pH of the salt solution by using potentio

46、metric measurement at 25 C 2 C. Finely adjust the pH of the salt solution to a value of 4,2 0,1 by standard addition of a diluted sulphuric acid solution (e.g. 1 ml of 0,05 mol/L H2SO4is added to 1 l of salt solution).4 Apparatus4.1 Climate chamberThe climate chamber shall be designed so that the fo

47、llowing test conditions can be obtained, controlled and monitored during the test.An instantaneous maximum deviation from set relative humidity value of 4 % in the range from 50 % to 95 % at 35 C, which corresponds to a temperature accuracy requirement of 0,8 C at that temperature. For the mean valu

48、e in relative humidity during a period of constant climatic conditions 7 h to 8 h an accuracy of 2 % shall apply, corresponding to temperature accuracy requirement of in this case 0,4 C.To meet the temperature and humidity accuracy requirements, the climate chamber should be equipped with means for efficient circulation of air to provide for small temperature and humidity variations in the chamber. Sufficient insulat