BS EN ISO 10308-2006 Metallic coatings Review of porosity tests《金属覆层 孔隙率试验复审》.pdf

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1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN ISO 10308:2006 has the status of a British StandardICS 25.220.40Metallic c

2、oatings Review of porosity testsBRITISH STANDARDBS EN ISO 10308:2006BS EN ISO 10308:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2006 BSI 31 January 2006ISBN 0 580 47688 XCross-referencesThe British Standards which implement

3、 international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not

4、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN ISO tit

5、le page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 32, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations

6、 represented on this committee can be obtained on request to its secretary. present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate

7、 them in the UK.National forewordThis British Standard is the official English language version of EN ISO 10308:2006. It is identical with ISO 10308:2006. It supersedes BS EN ISO 10308:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electr

8、odeposited and related coatings, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10308January 2006ICS 25.220.40 Supersedes EN ISO 10308:1997 English VersionMetallic coatings - Review of porosity tests (ISO 10308:2006)Revteme

9、nts mtalliques - Passage en revue des essaisde porosit (ISO 10308:2006)Metallische berzge - bersicht der Porenprfverfahren(ISO 10308:2006)This European Standard was approved by CEN on 28 December 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi

10、tions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three off

11、icial versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Be

12、lgium, 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZ

13、ATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 10308:2006: EForeword This document (EN ISO 10308:2006)

14、has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“ in collaboration with 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,

15、either by publication of an identical text or by endorsement, at the latest by July 2006, and conflicting national standards shall be withdrawn at the latest by July 2006. This document supersedes EN ISO 10308:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizati

16、ons of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia

17、, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 10308:2006 has been approved by CEN as EN ISO 10308:2006 without any modifications. EN ISO 10308:2006Reference numberISO 10308:2006(E)INTERNATIONAL STANDARD ISO10308Second edition2006-01-15Metallic coatings

18、 Review of porosity tests Revtements mtalliques Passage en revue des essais de porosit EN ISO 10308:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 2 5 Common features of porosity tests 2 6 Test specimens . 2 7 Specific porosity test

19、s 2 7.1 Alizarin test 2 7.2 Anthraquinone test. 3 7.3 Cadmium sulfide test 3 7.4 Copper sulfate (Preece) test 3 7.5 Copper sulfate (Dupernell) test . 3 7.6 Corrodkote test (CORR) . 4 7.7 Electrographic tests . 4 7.8 Ferrocyanide test 5 7.9 Ferron test . 5 7.10 Ferroxyl test 6 7.11 Flowers-of-sulfur

20、porosity test 6 7.12 Hot-water test 6 7.13 Hydrogen sulfide or sulfur dioxide/hydrogen sulfide test 6 7.14 Haematoxylin test . 7 7.15 Magneson test. 7 7.16 Nitric acid vapour test 7 7.17 Oxine test. 8 7.18 Permanganate test 8 7.19 Polysulfide test . 8 7.20 Porotest test 8 7.21 Salt spray tests neutr

21、al (NSS), acetic (AASS) and cuproacetic (CASS). 9 7.22 Sulfur dioxide test. 9 7.23 Sulfurous acid/sulfur dioxide vapour test 9 7.24 Thiocyanate test 9 7.25 Thioacetamlde test (TAA) 10 7.26 Watch-case acetic acid test . 10 7.27 Watch-case sodium bisulfite test 10 Annex A (normative) Tables of porosit

22、y tests. 11 Annex B (informative) Typical report and evaluation of porosity tests 14 Annex C (informative) Schematic representation of types of pore. 16 Annex D (informative) Classification of discontinuities in metallic and other inorganic coatings . 17 Annex E (informative) Classification of metho

23、ds of testing coating porosity. 18 Annex F (informative) Alphabetical list of tests by substrate and coating 19 Bibliography . 30 EN ISO 10308:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work

24、 of preparing International Standards is normally carried out through ISO technical committees. Each member body interested 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-governmen

25、tal, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The ma

26、in task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are 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. At

27、tention 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 identifying any or all such patent rights. ISO 10308 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcom

28、mittee SC 7, Corrosion tests. This second edition cancels and replaces the first edition (ISO 10308:1995), which has been technically revised. EN ISO 10308:20061Metallic coatings Review of porosity tests WARNING This international Standard calls for the use of substances and/or procedures that can b

29、e injurious to health if adequate precautions are not taken. It refers only to technical suitability and in no way absolves either the designer, the producer, the supplier or the user from statutory and all other legal obligations relating to health and safety at any stage of manufacture or use. 1 S

30、cope This International Standard reviews published methods for revealing pores (see ISO 2080) and discontinuities in coatings of aluminium, anodized aluminium, brass, cadmium, chromium, cobalt, copper, gold, indium, lead, nickel, nickel-boron, nickel-cobalt, nickel-iron, nickel-phosphorus, palladium

31、, platinum, vitreous or porcelain enamel, rhodium, silver, tin, tin-lead, tin-nickel, tin-zinc, zinc and chromate or phosphate conversion coatings (including associated organic films) on aluminium, beryllium-copper, brass, copper, iron, NiFeCo alloys, magnesium, nickel, nickel-boron, nickel-phosphor

32、us, phosphor-bronze, silver, steel, tin-nickel and zinc alloy basis metal. The tests summarized in this International Standard are designed to react with the substrate when exposed, by a discontinuity, in such a way as to form an observable reaction product. NOTE 1 Pores are usually perpendicular to

33、 the coating surface but may be inclined to the coating surface. They are frequently cylindrical in shape but may also assume a twisted shape (see Annex C). NOTE 2 Porosity may vary in size from the submicroscopic, invisible using a light microscope, to the microscopic, visible from 10 to 1 000, to

34、the macroscopic, visible to the naked eye. NOTE 3 Porosity may be visibly indicated by discolouration of the coated surface. NOTE 4 Porosity in a coating is not always detrimental. In microdiscontinuous chromium, for example, porosity or microcracking is beneficial and tests are conducted to indicat

35、e the pores. NOTE 5 Results obtained from porosity tests, expressed in terms such as pores per square centimeter, are relative values associated with the specific test method used and the magnification used during examination. Annex B gives typical report criteria. 2 Normative references The followi

36、ng 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 amendments) applies. ISO 2080:1981, Electroplating and related processes Vocabula

37、ry ISO 10289:1999, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rating of test specimens and manufactured articles subjected to corrosion tests 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2080 and

38、the following apply. EN ISO 10308:20062 3.1 discontinuities cracks, micro-holes, pits, scratches or any other opening in the coating surface that exposes a different underlying metal NOTE For further information on discontinuities, see Annex D and reference 1 in the Bibliography. 4 Principle The res

39、ults of porosity tests are the end products of a chemical reaction with a metallic substrate. Some occur in situ, others on paper or in a gel coating. Observations are made that are consistent with the test method and the items being tested, as specified by the purchaser. These may be visual inspect

40、ions (naked eye) or at 10 magnification (microscope). Other methods may involve enlarged photographs or photo-micrographs. See references 1,2, 3, 5 and 6 in the Bibliography (see also Annex A for a tabular summary of the porosity tests and Annex D for a classification of discontinuities). 5 Common f

41、eatures of porosity tests Porosity tests differ from corrosion tests and, particularly, ageing tests regarding test duration. Porosity tests are primarily short-time tests. A good porosity test process shall clean, depolarize and activate the substrate metal exposed by the pore and attack it to such

42、 a degree as to cause the reaction product to fill the pore to the surface of the coating. The corrosive shall not react with the coating. It is essential that the time of reaction be limited, particularly with thin coatings, since the corrosive will attack the substrate in all directions and, in so

43、 doing, will undermine the coatings resulting in misleading observations. When the corrosion product is soluble in the reagent, the precipitating indicator is used to form the reaction product. (See Annex E for a classification of methods of porosity testing). 6 Test specimens Porosity tests are gen

44、erally destructive in nature and are designed to assess the quality of the coating process of the substrate. Therefore, as a rule, separate test specimens are not used. 7 Specific porosity tests 7.1 Alizarin test 7.1.1 Scope For coatings of chromium (including Cr/Ni/Cu and Cr/Ni/Ni), cobalt, copper,

45、 nickel, nickel-boron, nickel-cobalt, nickel-iron and nickel-phosphorus on aluminium substrate. 7.1.2 Summary of method The test specimens are treated with sodium hydroxide, sodium alizarin sulfonate and glacial acetic acid under defined conditions. Formation of red markings or spots indicates poros

46、ity. Details of the test procedure can be found in references 9, 21 and 25 in the Bibliography. EN ISO 10308:200637.2 Anthraquinone test 7.2.1 Scope For coatings of chromium (including Cr/Ni/Ni), cobalt, nickel, nickel-boron, nickel-cobalt, nickel-iron and nickel-phosphorus on aluminium, magnesium o

47、r zinc alloy substrates. 7.2.2 Summary of method The test specimens are treated with sodium hydroxide and potassium 1-aminoanthraquinone-2-carboxylic acid under defined conditions. The formation of red markings or spots indicates porosity. Details of the test procedure can be found in reference 13 i

48、n the Bibliography. 7.3 Cadmium sulfide test 7.3.1 Scope For metallic coatings of chromium (including Cr/Ni/Ni), gold, palladium, platinum and rhodium on beryllium-copper, brass, copper, phosphor-bronze and silver substrates. 7.3.2 Summary of method Filter paper is soaked in cadmium chloride and the

49、n treated with sodium sulfide to precipitate cadmium sulfide. The sample is sandwiched between the cadmium sulfide paper (which acts as the anode) and the moistened blotting paper fastened to a high-purity clean aluminium or stainless steel platen (which acts as the cathode). D.C. current is applied for a specific time. Brown stains on the paper indicate pores. Details of the test procedure can be found in ISO 4524-3. 7.4 Copper sulfate (Preece) test 7.4.1 Scope Variation A. For coatings of cadmium