1、|BRITISH STANDARDBS EN ISO15730:2016ICS 25.220.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWMetallic and other inorganic coatings Electropolishing as a means of smoothing and passivating stainless steel (ISO 15730:2000)This British Standard, havingbeen prepared under thedi
2、rection of the SectorCommittee for Materials andChemicals, was published underthe authority of the StandardsCommittee and comes into effecton 15 February 2001ISBN 978 0 580 90542 1BS EN ISO 15730:2016Amendments/corrigenda issued since publicationDate CommentsNational forewordThis British Standard is
3、 the UK implementation of EN ISO 15730:2016. It isThe UK participation in its preparation was entrusted to Technical CommitteeSTI/33, Electrodeposited and related coatings.A list of organizations represented on this committee can be obtained on request toits secretary.A British Standard does not pur
4、port to include all the necessary provisions of acontract. Users of British Standards are responsible for their correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.identical to ISO 15730:2000. It supersedes BS ISO 15730:2000 which is withdrawn. The Bri
5、tish Standards Institution 2016. Published by BSI Standards Limited 201631 May 2016 This corrigendum renumbers BS ISO 15730:2000 as BS EN ISO 15730:2016.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15730 April 2016 ICS 25.220.20 English Version Metallic and other inorganic coatings - Ele
6、ctropolishing as a means of smoothing and passivating stainless steel (ISO 15730:2000) Revtements mtalliques et autres revtements inorganiques - Polissage lectrolytique: procd de brillantage (ou nivellement) et de passivation des aciers inoxydables (ISO 15730:2000) Metallische und andere anorganisch
7、e berzge - Elektropolieren als Mittel zum Gltten und Passivieren von rostfreiem Stahl (ISO 15730:2000) 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 Standar
8、d the status of a national standard without any alteration. Up-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,
9、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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulga
10、ria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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, Tur
11、key and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION 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.
12、Ref. No. EN ISO 15730:2016 E EN ISO 15730:2016 (E) European foreword The text of ISO 15730:2000 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 15730:2016 by Tech
13、nical 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 s
14、tandards 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-CENELE
15、C 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Icel
16、and, 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 15730:2000 has been approved by CEN as EN ISO 15730:2016 without any modificati
17、on. BS EN ISO 15730:2016iiISO 15730:2000(E)iiiContents Page1 Scope . 12 Normative references . 13 Terms and definitions 14 Information to be supplied by the purchaser to the finisher 25 Requirements . 26 Sampling . 47 Test methods 48 Test report 5AnnexA Typical electropolishing solution and operatin
18、g conditions 7Bibliography. 8BS EN ISO 15730:2016ISO 15730:2000(E)ivForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technical
19、com-mittees. Each member body interested in a subject for which a technical committee has been established has theright to be represented on that committee. International organizations, governmental and non-governmental, in liai-son with ISO, also take part in the work. ISO collaborates closely with
20、 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 3.Draft International Standards adopted by the technical committees are circulated to the memb
21、er 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 International Standard may be the subject ofpatent rights. ISO shall not be held responsible fo
22、r identifying any or all such patent rights.International Standard ISO 15730 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganiccoatings, Subcommittee SC 8, Chemical conversion coatings.Annex A of this International Standard is for information only.BS EN ISO 15730:2016ISO 15
23、730:2000(E)vIntroductionElectropolishing removes a small but finite amount of metal from the surface that, in addition to smoothing and bright-ening, produces a hygienically clean surface desirable for use by manufacturers of food processing and medicalequipment.In addition to improved passivation,
24、electropolishing provides many other benefits. Some examples are surfacestress relief, removal of surface carbon and oxides and reduction of friction. Hydrogen embrittlement of articles is notproduced during the electropolishing process, which takes minutes to perform.The quality of passivation depe
25、nds on the type of stainless steel, the formulation of the electropolishing solution andthe conditions of operation. Free iron on the surface of the stainless steel is removed resulting in improved corrosionresistance. No further chemical treatment is necessary in order to passivate the stainless st
26、eel surface. Surfacesmoothing obtained by electropolishing also improves passivation.BS EN ISO 15730:2016INTERNATIONAL STANDARD ISO 15730:2000(E)1Metallic and other inorganic coatings Electropolishing as ameans of smoothing and passivating stainless steelWARNING The use of this International Standar
27、d may involve hazardous materials, operations and equip-ment. This International Standard does not purport to address all the safety problems associated with itsuse. It is the responsibility of the user of this International Standard to establish appropriate safety andhealth practices and determine
28、the applicability of regulatory limitations prior to use.Large quantities of hydrogen and oxygen gases are evolved at the electrodes during the electropolishingprocess.Properventilationproceduresshouldbeusedtoensuretheirremoval.Ignitionofhydrogengascanresult in dangerous explosions.1 ScopeThis Inter
29、national Standard specifies the information to be supplied by the purchaser to the finisher, requirementsand test methods for electropolishing as a means of smoothing and passivating stainless steel alloys in the S2XXXX,S3XXXX and S4XXXX series, and the precipitation hardened alloys (see ISO/TR 1551
30、0 for information on composi-tion).2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis International Standard. For dated references, subsequent amendments to, or revisions of, any of these publica-tions do not
31、 apply. However, parties to agreements based on this International Standard are encouraged to investi-gate the possibility of applying the most recent editions of the normative documents indicated below. For undatedreferences, the latest edition of the normative document referred to applies. Members
32、 of ISO and IEC maintain reg-isters of currently valid International Standards.ISO 2064:1996, Metallic and other inorganic coatings Definitions and conventions concerning the measurementof thickness.ISO 2080:1981, Electroplating and related processes Vocabulary.ISO 4519:1980, Electrodeposited metall
33、ic coatings and related finishes Sampling procedures for inspection by at-tributes.ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests.ISO/TR 15510, Stainless steels Chemical composition.ISO 16348:1), Metallic and other inorganic coatings Definitions and conventions concerning appea
34、rance.3 Terms and definitionsFor the purposes of this International Standard, the definitions given in ISO 2064, ISO 2080 and ISO 4519 (some ofwhich are repeated below for convenience) and the following apply.1) To be published.BS EN ISO 15730:2016ISO 15730:2000(E)23.1passivationrendering of a stain
35、less steel surface into a lower state of chemical reactivityNOTE Passivated surfaces are characterized by the absence of free iron and the formation of a thin coherent oxide film.3.2electropolishingsmoothing and brightening of a metal surface by making it anodic in an appropriate solutionISO 2080:19
36、813.3inspection lotcollection of treated items that are of the same kind, that have been produced to the same specifications, that havebeen treated by a single supplier at one time, or at approximately the same time, under essentially identical condi-tions and that are submitted for acceptance or re
37、jection as a groupBased on ISO 4519:1980, definition 3.73.4significant surfacepart of the article covered or to be covered by the coating and for which the coating is essential for serviceabilityand/or appearance and where the coating has to meet all of the specified requirementsISO 2064:19964 Infor
38、mation to be supplied by the purchaser to the finisherWhen ordering articles smoothed and passivated in accordance with this International Standard, the purchaser shallprovide the following information:a) the number of this International Standard, i.e. ISO 15730, the alloy designation number and the
39、 test method(s) tobe used to evaluate the article (see clause 7);b) the appearance required. Alternatively, a sample showing the required finish shall be supplied or approved by thepurchaser in accordance with ISO 16348 (see note 1);c) those areas on the article where electrical contact is acceptabl
40、e;d) the dimensional tolerances, if any, to be stated in the ordering document (see note 2);e) any requirements for passivation testing (see 5.3 and clause 7);f) any requirement for the provision of a test report (see 5.4 and clause 8).NOTE 1 When required, the basis material may be subjected, prior
41、 to electropolishing, to such mechanical polishing as may berequired to yield the desired final surface characteristics.NOTE 2 Typically, to of metal are removed from the surface during electropolishing; however, up to may beremoved for additional smoothing. Greater amounts will be removed from corn
42、ers and edges, i.e. areas of high current density, un-less shields and/or auxiliary cathodes are used.5 Requirements5.1 Visual defectsWhere specified the significant surfaces of the article to be smoothed and passivated by electropolishing shall befree of clearly visible defects such as pits, roughn
43、ess, striations or discoloration when examined with 20/20 eyesightat a distance of approximately .5 m10 m 50 m0,5 mBS EN ISO 15730:2016ISO 15730:2000(E)3NOTE Defects in the surface of the basis material such as scratches, porosity and inclusions can adversely affect the appear-ance and performance o
44、f the article.5.2 Process5.2.1 GeneralThe basis material may have to be subjected to preparatory operations, e.g. polishing and cleaning in order to re-move surface soil such as polishing compounds, oils, etc.5.2.2 ElectropolishingFollowing any preparatory operations, the article(s) shall be introdu
45、ced into the electropolishing solution for a periodof time at the current density and temperature required to produce the surface finish specified by the purchasersee b) of clause 4.NOTE 1 Annex A describes a typical electropolishing solution and operating conditions suitable for many stainless stee
46、l alloys.NOTE 2 Proprietary electropolishing solutions are available offering special features such as low sludging, better bright throwingpower, longer life or better performance with specific stainless steel alloys.NOTE 3 Intricately shaped articles may not receive the same degree of passivation i
47、n recessed areas due to low current densi-ties. By increasing the time and/or overall current density, or by using auxiliary cathodes, the electropolishing may be improved insuch areas and subsequent passivation tests may be passed.5.2.3 Post treatment and rinsingThe electropolishing process produce
48、s a residual surface film when withdrawn from the electropolishing solution thatcan adversely affect appearance or performance.The film shall be removed either by: immersing the article in nitric acid solution of volume fraction to volume fraction (relative density 1,42;mass fraction) at room temper
49、ature; or using several rinse stages.Neutralization procedures such as immersion in alkaline solutions shall not be used as they have a tendency to “set”the residual surface film and detract from appearance and performance.The article shall be rinsed subsequently to remove all traces of acidified water that can affect the appearance andperformance of the passive part.NOTE De-ionized or distilled water may be used to avo
