1、August 2016 English price group 7No 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 25.220.40!%Y.“2541125www.din.deDIN
2、 EN ISO 10309Metallic coatings Porosity tests Ferroxyl test (ISO 10309:1994);English version EN ISO 10309:2016,English translation of DIN EN ISO 10309:2016-08Metallische berzge Prfverfahren zur Bestimmung der Porositt Ferroxylprfung (ISO 10309:1994);Englische Fassung EN ISO 10309:2016,Englische bers
3、etzung von DIN EN ISO 10309:2016-08Revtements mtalliques Essais de porosit Essai au ferroxyle (ISO 10309:1994);Version anglaise EN ISO 10309:2016,Traduction anglaise de DIN EN ISO 10309:2016-08www.beuth.deDocument comprises 9 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-langu
4、age original shall be considered authoritative.08.16 DIN EN ISO 10309:2016-08 2 A comma is used as the decimal marker. National foreword The text of ISO 10309:1994 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” and has been taken over as EN ISO 10309:2016
5、 by Technical Committee CEN/TC 262 Metallic and other inorganic coatings (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-61 AA Mess- und Prfverf
6、ahren fr metallische und andere anorganische berzge. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 3696 DIN ISO 3696 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test me
7、thods EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10309 April 2016 ICS 25.220.40 English Version Metallic coatings Porosity tests Ferroxyl test (ISO 10309:1994) Revtements mtalliques Essais de porosit Essai au ferroxyle (ISO 10309:1994) Metallische berzge Prfverfahren zur Bestimmung der
8、 Porositt Ferroxylprfung (ISO 10309:1994) This European Standard was approved by CEN on 2 April 2016. 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. U
9、p-to-date lists and bibliographical 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 tran
10、slation under the responsibility of 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, Finla
11、nd, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
12、 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10309:2016 EEN ISO 10309:2016 (E) 2 Contents P
13、age European foreword . 3 Endorsement notice . 3 Foreword 4 1 Scope 5 2 Normative reference 5 3 Principle . 5 4 Reagents and materials . 5 4.1 Purity . 5 4.2 Preparation of the indicator solution 5 4.2.1 Sodium chloride reagent 5 4.2.2 Ferricyanide reagent . 6 4.3 Optional equipment . 6 5 Procedure.
14、 6 5.1 Specimen preparation . 6 5.2 Treated test paper 6 5.2.1 Iron contamination . 6 5.2.2 Preparation . 6 5.2.3 Applying the test paper . 6 5.2.4 Test paper development . 7 5.3 Test paper examination 7 5.4 Discontinuity enumeration . 7 5.5 Retest . 7 6 Expression of results 7 7 Test report . 7 DIN
15、 EN ISO 10309:2016-08 EN ISO 10309:2016 (E) 3 European foreword The text of ISO 10309:1994 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 10309:2016 by Technical
16、 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 October 2016, and conflicting national standa
17、rds shall be withdrawn at the latest by October 2016. 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. According to the CEN-CENELEC Int
18、ernal 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland,
19、Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 10309:1994 has been approved by CEN as EN ISO 10309:2016 without any modification. D
20、IN EN ISO 10309:2016-08 EN ISO 10309:2016 (E) 4 Foreword 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 m
21、ember 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
22、Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 cas
23、ting a vote. International Standard ISO 10309 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 7, Corrosion tests. DIN EN ISO 10309:2016-08 EN ISO 10309:2016 (E) 5 1 Scope This International Standard specifies a method of revealing pores or other
24、 discontinuities, when testing metallic coatings, that are not visibly affected by ferricyanide and chloride ions during the test period and that are cathodic to iron and steel. This method is especially useful for thick, hard chromium coatings used for wear resistance. NOTE 1 With some coating mate
25、rials a very thin layer is dissolved by the sodium chloride solution during a 10 minute application period (see 5.2.3). The impact of such dissolution is that potential porosity, i.e. pores that have been covered over by very thin layers, are sometimes re-exposed. Experience has shown that such pote
26、ntial porosity is frequently re-exposed during actual service. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are
27、subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3696:1987,
28、Water for analytical laboratory use Specification and test methods 3 Principle Base metal ions, formed in corrosion cells at the bottom of discontinuities in metallic coatings migrate to treated test paper held in contact with the coating surface. The base metal ions retained on the treated test pap
29、er form a blue-coloured marking or spot when the treated paper is subsequently immersed in a solution of a ferricyanide indicator solution. 4 Reagents and materials 4.1 Purity All chemicals used shall be of a recognized analytical reagent grade and the water used shall be distilled or deionized havi
30、ng a conductivity not greater than 20 S/cm (see ISO 3696). 4.2 Preparation of the indicator solution 4.2.1 Sodium chloride reagent Dissolve 50 g of sodium chloride and 1 g of a non-ionic wetting agent in 1 litre of hot (90 C) water. Dissolve 50 g of gelatin or agar in the above mentioned hot sodium
31、chloride solution to provide gelling properties. The solution will then gel upon cooling, but can be re-liquefied, for use, by heating it to 35 C. NOTE 2 A variety of non-ionic wetting agents is commercially available. DIN EN ISO 10309:2016-08 EN ISO 10309:2016 (E) 6 4.2.2 Ferricyanide reagent Disso
32、lve 10 g of potassium hexacyanoferrate(III) (potassium ferricyanide) in 1 litre of water. Measure the pH of the solution. If it is outside the range 6 0,2 discard the solution and the reagent and obtain a purer grade of reagent. 4.3 Optional equipment A flat, flexible plastic sheet (template) with a
33、 square opening, at least 10 mm null 10 mm in size, may be used to define the test area of the test paper after the appearance of the blue coloration (development). 5 Procedure 5.1 Specimen preparation Clean and degrease the surface area to be tested using a suitable solvent, such as 1,1,1 trichloro
34、ethane. 5.2 Treated test paper 5.2.1 Iron contamination The paper used to prepare the test strips must be free of any iron contamination. This may be verified by first immersing the paper in sodium chloride solution, blotting, and then immersing the paper in the potassium hexacyanoferrate(III) solut
35、ion. Iron contamination will be evidenced by blue markings or spots, or a slight change or reduction in the white appearance of the dried paper when compared with the untreated paper. 5.2.2 Preparation Immerse strips of a suitable paper, for example “wet strength” filter paper, in the sodium chlorid
36、e or sodium chloride-gelatin solution (see 4.2.1) until they have been thoroughly wetted by the solution. Remove the strips and allow any excess solution to drain for about 1 min. NOTE 3 A clean glass plate has been found useful for draining and holding the moistened test papers. NOTE 4 Application
37、of the sodium chloride solution directly to the test surface produces diffuse rather than sharply defined pore sites. Therefore, the use of test paper which produces sharply defined pore sites is recommended. 5.2.3 Applying the test paper Apply the wet test paper to the cleaned surface of the coatin
38、g pressing it firmly into contact. It is essential that complete contact be made by the moistened test paper over the entire area under test in order that the sodium chloride solution may react with any exposed base metal. Allow the test paper to remain in contact for 10 min. If the paper becomes dr
39、y during the test, moisten it with additional solution taking care not to move it. NOTE 5 For irregular or small surfaces it may be useful to cut the test paper to the shape of the area to be tested. DIN EN ISO 10309:2016-08 EN ISO 10309:2016 (E) 7 5.2.4 Test paper development Remove the paper from
40、the test surface and immediately place it in the potassium hexacyanoferrate(III) solution (see 4.2.2) to allow the blue solution to develop at the discontinuity sites. 5.3 Test paper examination Examine the developed test paper surface for evidence of discontinuities. Sharply defined blue markings o
41、r spots are produced on the paper wherever the base steel or iron was exposed due to discontinuities in the coating. 5.4 Discontinuity enumeration Count the blue markings or spots on the test area without the aid of magnification. NOTE 6 For large test areas a plastic template (see 4.3) may be place
42、d over the test paper, after development, and used for counting discontinuities. 5.5 Retest If necessary, the same area may be retested. It is essential that the coating surface be thoroughly rinsed with hot analytical grade water (see 4.1) to remove any traces of residual gelatinized chloride reage
43、nt which may contain reaction products from the previous test. After cleaning, the part shall be thoroughly dried in order to avoid smudging any discontinuity indications produced during retest. 6 Expression of results Express the porosity on the test area as an average value of X pores/cm2or as the
44、 maximum count of pores/cm2using a 10 mm by 10 mm counting template. NOTE 7 Given that pass-fail criteria vary with the coating specification and the product specification, as well as with the thickness of coating used, they are not specified here. 7 Test report The test report shall contain the following information: a) the number of this International Standard; b) the area of surface tested; c) a reference to the relevant coating or product standard; d) the result, expressed as in clause 6. DIN EN ISO 10309:2016-08
