Sherardizing - Zinc diffusion coatings on ferrous products - Specification

This EN specifies minimum thickness requirements for three classes of zinc coating applied to ferrous products by the sherardizing process for the purpose of protection against corrosion and abrasion. It also specifies minimum requirements for the zinc dust to be used during the sherardizing process. This standard does not specify any requirements for the surface condition (finish or roughness) of the basis material before sherardizing. After-treatments or overcoating of sherardized articles is not covered by this standard.

Sherardisieren - Zink-Diffusionsüberzüge auf Eisenwerkstoffen - Anforderungen

Diese Europäische Norm legt für drei Klassen von Zinküberzügen, die zum Schutz vor Korrosion und Verschleiß mit Hilfe des Sherardisierverfahrens auf Eisenwerkstoffe aufgebracht wurden, Anforderungen an die Mindestschichtdicke fest. Sie legt auch Mindestanforderungen für den beim Sherardisierverfahren verwendeten Zinkstaub fest. Diese Norm legt keine Anforderungen an den Zustand der Oberfläche (Oberflächenbeschaffenheit oder Rauhigkeit) des Grundwerkstoffs vor dem Sherardisieren fest. Nachbehandlung oder Versiegelung von sherardisierten Bauteilen wird von der vorliegenden Norm nicht erfaßt.

Shérardisation - Revêtement par diffusion de zinc sur les produits ferreux - Spécifications

La présente Norme européenne spécifie les exigences d'épaisseur minimale relatives à trois classes de revêtement de zinc appliqué aux produits ferreux par shérardisation afin de les protéger contre la corrosion et l'abrasion.
Elle spécifie également les exigences minimales relatives à la poussière de zinc à utiliser lors de l'application du procédé de shérardisation.
La présente Norme ne spécifie aucune exigence relative à l'état de surface (fini ou rugosité) du matériau de base avant shérardisation.
Les post-traitements ou le revêtement des pièces shérardisées ne sont pas traités par la présente norme.

Šeradiranje cinkove difuzijske prevleke na železovih izdelkih - Zahteve

General Information

Status
Withdrawn
Publication Date
22-Apr-2003
Withdrawal Date
01-Mar-2016
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
02-Mar-2016

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Šeradiranje cinkove difuzijske prevleke na železovih izdelkih - ZahteveSherardisieren - Zink-Diffusionsüberzüge auf Eisenwerkstoffen - AnforderungenShérardisation - Revetement par diffusion de zinc sur les produits ferreux - SpécificationsSherardizing - Zinc diffusion coatings on ferrous products - Specification25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:EN 13811:2003SIST EN 13811:2003en01-december-2003SIST EN 13811:2003SLOVENSKI

STANDARD
SIST EN 13811:2003

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13811April 2003ICS 25.220.40English versionSherardizing - Zinc diffusion coatings on ferrous products -SpecificationShérardisation - Revêtements par diffusion de zinc sur lesproduits ferreux - SpécificationsSherardisieren - Zink-Diffusionsüberzüge aufEisenwerkstoffen - AnforderungenThis European Standard was approved by CEN on 20 February 2003.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 bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13811:2003 ESIST EN 13811:2003

EN 13811:2003 (E)2ContentsForeword......................................................................................................................................................................31Scope..............................................................................................................................................................42Normative references....................................................................................................................................43Terms and definitions....................................................................................................................................44General requirements....................................................................................................................................54.1Zinc dust.........................................................................................................................................................54.2Information to be supplied by the purchaser..............................................................................................55Sampling.........................................................................................................................................................56Coating requirement......................................................................................................................................66.1Thickness........................................................................................................................................................66.2Test methods..................................................................................................................................................66.2.1General............................................................................................................................................................66.2.2Reference areas.............................................................................................................................................76.2.3Magnetic method...........................................................................................................................................76.2.4Gravimetric method.......................................................................................................................................77Certificate of conformity...............................................................................................................................7Annex A (normative)

Information to be supplied by the purchaser to the sherardizer.......................................8A.1Essential information....................................................................................................................................8A.2Additional information...................................................................................................................................8Annex B (informative)

Determination of thickness..................................................................................................9B.1General............................................................................................................................................................9B.2Microscopic cross-section method.............................................................................................................9B.3Calculation of thickness from mass per unit area (reference method)....................................................9Annex C (informative)

General information............................................................................................................10C.1Sherardizing process..................................................................................................................................10C.2Basis material...............................................................................................................................................10C.3Appearance...................................................................................................................................................10C.4Adhesion.......................................................................................................................................................10C.5After-treatments...........................................................................................................................................10C.6Coating thickness........................................................................................................................................10C.7Additional clearances for threaded fasteners...........................................................................................11Bibliography..............................................................................................................................................................12SIST EN 13811:2003

EN 13811:2003 (E)3ForewordThis document EN 13811:2003 has been prepared by Technical Committee CEN /TC 262, "Metallic and otherinorganic 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 orby endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.Annex A is normative. Annexes B and C are informative.This document includes a Bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovak Republic, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13811:2003

EN 13811:2003 (E)41 ScopeThis European Standard specifies minimum thickness requirements for three classes of zinc coating applied toferrous products by the sherardizing process for the purpose of protection against corrosion and abrasion.It also specifies minimum requirements for the zinc dust to be used during the sherardizing process.This standard does not specify any requirements for the surface condition (finish or roughness) of the basismaterial before sherardizing.After-treatments or overcoating of sherardized articles is not covered by this standard.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 10204, Metallic products — Types of inspection documents.EN ISO 1460, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric determination ofthe mass per unit area (ISO 1460:1992).EN ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magneticmethod (ISO 2178:1982).EN ISO 3549, Zinc dust pigments for paints — Specifications and test methods (ISO 3549:1995).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1sherardizingsolid diffusion process in which articles are heated in close contact with zinc dust and an inert material such assand3.2sherardized coatingcoating consisting of zinc/iron alloys obtained by the sherardizing process, and subsequently passivatedNOTE‘Sherardized coating’ is referred to in this standard as ‘coating’.3.3coating masstotal mass of zinc/iron alloys per unit area of surface, expressed in grams per square metre, g/m23.4coating thicknesstotal coating thickness of zinc/iron alloys, expressed in micrometres, mmSIST EN 13811:2003

EN 13811:2003 (E)53.5significant surfacethe part of the article covered or to be covered by the coating and for which the coating is essential forserviceability and/or appearance and where the coating must meet all of the specified requirements[ISO 2064:1996, definition 3.1]3.6control samplearticle, or group of articles, from a lot which is selected for testing3.7reference areaarea within which a specified number of single measurements is required to be made[ISO 2064:1996, definition 3.3]3.8local coating thicknessmean value of coating thickness obtained from a number of measurements within a reference area in a magnetic orelectro-magnetic test3.9local coating massvalue of coating mass obtained from a single gravimetric test3.10inspection lotone or more articles of the same type and size comprising either a single order or a single delivery load or thenumber of articles identified as a lot by the sherardizer4 General requirements4.1 Zinc dustWhen determined in accordance with EN ISO 3549 the zinc dust used in the sherardizing process shall contain amass fraction of not less than 94 % of metallic zinc and total impurities (other than zinc oxide) of not more than 2%mass fraction.4.2 Information to be supplied by the purchaserInformation shall be supplied by the purchaser in accordance with annex A.5 SamplingA control sample (3.6) for thickness testing shall be taken randomly from each inspection lot (3.10) sele

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