1、June 2016 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 25.220.40!%VpP“2517745www.din.deDIN
2、 EN ISO 17668Zinc diffusion coatings on ferrous products Sherardizing Specification (ISO 17668:2016);English version EN ISO 17668:2016,English translation of DIN EN ISO 17668:2016-06Zink-Diffusionsschichten auf Eisen Sherardisieren Anforderungen (ISO 17668:2016);Englische Fassung EN ISO 17668:2016,E
3、nglische bersetzung von DIN EN ISO 17668:2016-06Revtements par diffusion de zinc sur les produits ferreux Shrardisation Spcification (ISO 17668:2016);Version anglaise EN ISO 17668:2016,Traduction anglaise de DIN EN ISO 17668:2016-06SupersedesDIN EN 13811:2003-08www.beuth.deDocument comprises 22 page
4、sDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.16DIN EN ISO 17668:2016-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17668:2016) has been prepared by Technical Committee ISO/TC 107 “Metalli
5、c and other inorganic coatings” in collaboration with 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),
6、 Working Committee NA 062-01-75 AA Schmelztauchberzge. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1460 ISO 1463 ISO 2064 ISO 2178 ISO 2808 ISO 2859-1 ISO 2859-2 ISO 2859-3 ISO 3882 ISO 9223 ISO 12944-5 ISO 14713-1 ISO 14713-3 DIN E
7、N ISO 1460 DIN EN ISO 1463 DIN EN ISO 2064 DIN EN ISO 2178 DIN EN ISO 2808 DIN ISO 2859-1 DIN ISO 2859-2 DIN ISO 2859-3 DIN EN ISO 3882 DIN EN ISO 9223 DIN EN ISO 12944-5 DIN EN ISO 14713-1 DIN EN ISO 14713-3 Amendments This standard differs from DIN EN 13811:2003-08 as follows: a) the content of EN
8、 13811 has been incorporated in ISO 17668; b) the scope has been restricted; c) three further classes (classes 10, 60 and 70) of zinc diffusion coatings have been included; d) normative references have been updated; e) the terms “sherardizing mixture” (3.3) and “acceptance inspection” (3.12) have be
9、en added; f) Clause 5 now also includes specifications for acceptance inspection; g) Clause 6 “Coating properties” has been completely revised; h) Annex D (informative) has been added; i) the Bibliography has been updated. Previous editions DIN EN 13811: 2003-08 DIN EN ISO 17668:2016-06 3 National A
10、nnex NA (informative) Bibliography DIN EN ISO 1460, Metallic coatings Hot dip galvanized coatings on ferrous materials Gravimetric determination of the mass per unit area DIN EN ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical method DIN EN ISO 2064, Metallic and
11、other non-organic coatings Definitions and conventions concerning the measurement of thickness DIN EN ISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 3882, Metalli
12、c and other non-organic coatings Review of methods of measurement of thickness DIN EN ISO 9223, Corrosion of metals and alloys Corrosivity of atmospheres Classification, determination and estimation DIN EN ISO 12944-5, Paints and varnishes Corrosion protection of steel structures by protective paint
13、 systems Part 5: Protective paint systems DIN EN ISO 14713-1, Zinc coatings Guidelines and recommendations for the protection against corrosion of iron and steel in structures Part 1: General principles of design and corrosion resistance DIN EN ISO 14713-3, Zinc coatings Guidelines and recommendatio
14、ns for the protection against corrosion of iron and steel in structures Part 3: Sherardizing DIN ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection DIN ISO 2859-2, Sampling procedures for inspectio
15、n by attributes Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection DIN ISO 2859-3, Sampling procedures for inspection by attributes Part 3: Skip-lot sampling procedures DIN EN ISO 17668:2016-06 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EURO
16、PISCHE NORM EN ISO 17668 March 2016 ICS 25.220.40 Supersedes EN 13811:2003English Version Zinc diffusion coatings on ferrous products Sherardizing Specification (ISO 17668:2016) Revtements par diffusion de zinc sur les produits ferreux Shrardisation Spcification (ISO 17668:2016) Zink-Diffusionsschic
17、hten auf Eisen Sherardisieren Anforderungen (ISO 17668:2016) This European Standard was approved by CEN on 2 January 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 with
18、out 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, French, German). A version in any other
19、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, Bulgaria, Croatia, Cyprus, Czech Republic, De
20、nmark, 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, Turkey and United Kingdom. EUROPEAN COMMITT
21、EE 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. Ref. No. EN ISO 17668:2016 EEN ISO 17668
22、:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 6 4 General requirements . 8 4.1 Surface condition base material 8 4.2 Information to be supplied by the purchaser . 8 5 Acceptance inspection and sampling . 8 6 Coa
23、ting properties 9 6.1 Appearance 9 6.2 Thickness . 9 6.2.1 General 9 6.2.2 Test methods 9 6.2.3 Reference areas 10 6.2.4 Magnetic method or electro-magnetic method . 10 6.2.5 Gravimetric method 10 6.2.6 Thickness requirements 10 6.3 Acceptance criteria 11 6.4 Additional clearances for threaded compo
24、nents . 11 7 Ceritificate of compliance . 11 Annex A (normative) Information to be supplied by the purchaser to the sherardizer . 12 Annex B (informative) Determination of thickness 13 Annex C (informative) General information 15 Annex D (informative) Corrosion resistance of sherardized layers . 17
25、Bibliography . 18 DIN EN ISO 17668:2016-06 EN ISO 17668:2016 (E) 3 European foreword This document (EN ISO 17668:2016) 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 coatin
26、gs” 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 September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016.
27、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 supersedes EN 13811:2003. According to the CEN-CENELEC Internal Regulati
28、ons, 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, Ireland, Italy
29、, 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 17668:2016 has been approved by CEN as EN ISO 17668:2016 without any modification. DIN EN ISO 1766
30、8:2016-06 ForewordISO (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 for
31、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 al
32、l matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. Th
33、is document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 responsible for identifying any or
34、 all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users
35、and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary
36、information.The committee responsible for this document is ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 4, Hot dip coatings (galvanized, etc.).4EN ISO 17668:2016 (E) DIN EN ISO 17668:2016-06 IntroductionSherardizing is a thermal diffusion coating process in which ferrous articl
37、es are heated in the presence of a sherardizing mixture consisting of zinc dust with or without an inert material.The process is commonly performed in closed, slowly rotating or fixed containers at temperatures ranging from around 300 C to 500 C. The normal processing temperature is below the meltin
38、g point of zinc (419 C).During the process, zinc reacts with the surface to form inter-metallic layers on ferrous articles.A coating thickness of 10 m to 75 m (and higher if required) can be achieved. The coating thickness is accurately controlled by the amount of zinc dust, processing time and temp
39、erature. The coating closely follows the contours of the base material and uniform coating thicknesses are produced on articles, including those of irregular shape.After sherardizing, the container load is cooled down. A screening process separates the sherardized articles from the unused sherardizi
40、ng mixture. The articles, with the zinc-iron inter-metallic layers, are eventually post-treated (by phosphating, chromating or another suitable passivation process) resulting in a clean and passivated surface.It is common to use articles coated with zinc-iron inter-metallic layers as a primer or bas
41、e-coat for duplex-systems.For additional information about the sherardizing process and the application possibilities of sherardized articles, see Reference 12 and Reference 13.Sherardizing (thermal diffusion coating) is also known as the following: diffusion zinc plating (Germany); thermal diffusio
42、n coating (Russia); thermal diffusion galvanizing (Ukraine); vapour galvanizing (UK); zinc diffusion coating (USA); zinc inter-metallic coating (Russia); zinc thermo diffusion galvanizing (Israel).In China, Europe and the USA, the common name for the thermal diffusion coating process is sherardizing
43、.5 EN ISO 17668:2016 (E) DIN EN ISO 17668:2016-06 1 ScopeThis International Standard specifies minimum thickness requirements for six classes of zinc diffusion layers applied to ferrous products by the sherardizing process for the purpose of protection against corrosion and wear.This International S
44、tandard does not specify any requirements for the surface condition (finish or roughness) of the basis material before sherardizing.Post-treatments (conversion coatings), after-treatments or organic over-coatings (Duplex) of sherardized articles are not in the scope of this International Standard.NO
45、TE 1 For general information about post-treatments, see Annex C and Annex D.This International Standard does not apply to sherardized products (e.g. fasteners, tubes) for which specific standards exist and which might include additional requirements or requirements which are different from those of
46、this International Standard.NOTE 2 Individual product standards can incorporate this International Standard for the coating by quoting its number, or can incorporate it with modification specific to the product.2 Normative referencesThe following documents, in whole or in part, are normatively refer
47、enced in this document 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 1460, Metallic coatings Hot dip galvanized coatings on ferrous material
48、s Gravimetric determination of the mass per unit areaISO 2064, Metallic and other inorganic coatings Definitions and conventions concerning the measurement of thicknessISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic methodISO 2808, Paints and varnishe
49、s Determination of film thicknessISO 10474, Steel and steel products Inspection documents3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 2064 and the following apply.3.1sherardizing processzinc diffusion coating process in which articles are heated in close contact with a sherardizing mixture (3.3), commonly performed in a closed slowly rotating container or a fixed (non-rotating) container, to form sherardized layers (3.2)6EN ISO
