EN ISO 2081:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinske in druge anorganske prevleke - Galvanske prevleke cinka z dodatno obdelavo na železu in jeklu (ISO 2081:2008)Metallische Überzüge - Galvanische Zinküberzüge auf Eisenwerkstoffen mit zusätzlicher Behandlung (ISO 2081:2008)Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de zinc avec traitements supplémentaires sur fer ou acier (ISO 2081:2008)Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary treatments on iron or steel (ISO 2081:2008)25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:EN ISO 2081:2008SIST EN ISO 2081:2009en01-marec-2009SIST EN ISO 2081:2009SLOVENSKI
STANDARDSIST EN 12329:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 2081December 2008ICS 25.220.40Supersedes EN 12329:2000
English VersionMetallic and other inorganic coatings - Electroplated coatings ofzinc with supplementary treatments on iron or steel (ISO2081:2008)Revêtements métalliques et autres revêtementsinorganiques - Dépôts électrolytiques de zinc avectraitements supplémentaires sur fer ou acier (ISO2081:2008)Metallische Überzüge - Galvanische Zinküberzüge aufEisenwerkstoffen mit zusätzlicher Behandlung (ISO2081:2008)This European Standard was approved by CEN on 19 November 2008.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 2081:2008: ESIST EN ISO 2081:2009

Reference numberISO 2081:2008(E)© ISO 2008
INTERNATIONAL STANDARD ISO2081Third edition2008-12-15Metallic and other inorganic coatings — Electroplated coatings of zinc with supplementary treatments on iron or steel Revêtements métalliques et autres revêtements inorganiques —Dépôts électrolytiques de zinc avec traitements supplémentaires sur fer ou acier
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ii © ISO 2008 – All rights reserved
ISO 2081:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms, definitions, abbreviated terms and symbols.2 3.1 Terms and definitions.2 3.2 Abbreviated terms.2 3.3 Symbols.3 4 Information to be supplied by the purchaser to the electroplater.3 4.1 Essential information.3 4.2 Additional information.3 5 Designation.4 5.1 General.4 5.2 Designation specification.4 5.3 Designation of the basis material.5 5.4 Designation of heat treatment requirements.5 5.5 Examples.5 6 Requirements.6 6.1 Appearance.6 6.2 Thickness.6 6.3 Conversion coatings and other supplementary treatments.6 6.4 Adhesion of zinc and chromate coatings.7 6.5 Accelerated corrosion testing.7 6.6 Stress relief heat treatments before cleaning and metal deposition.9 6.7 Hydrogen-embrittlement-relief heat treatments after electroplating.9 7 Sampling.9 Annex A (normative)
Designation of chromate conversion coatings and other supplementary treatments.10 Annex B (normative)
Measurement of average thickness of coating on small articles.12 Annex C (informative)
Additional information on corrosion resistance, rinsing and drying, processing parts in bulk and dyeing of chromate conversion coatings.13 Bibliography.15
ISO 2081:2008(E) iv © ISO 2008 – All rights reserved 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 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-governmental, 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 main 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. 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 all such patent rights. ISO 2081 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes. This third edition cancels and replaces the second edition (ISO 2081:1986), which has been technically revised. SIST EN ISO 2081:2009

ISO 2081:2008(E) © ISO 2008 – All rights reserved vIntroduction Zinc coatings are applied to iron or steel articles for protective and decorative purposes by electrodeposition from acid zinc chloride, alkaline non-cyanide zinc, and alkaline zinc cyanide solutions. Electroplated, bright zinc coatings are popular and the processes for preparing bright zinc coatings are widely used. The ability of a zinc coating to prevent corrosion is a function of its thickness and the type of service conditions to which it is exposed. For example, the rate of corrosion of zinc will generally be greater in industrial exposures than in rural ones. The type of service condition should, therefore, be taken into consideration when specifying the minimum coating thickness. Chromate conversion coatings and other supplementary treatments enhance the corrosion resistance of electrodeposited zinc coatings and are commonly applied after electroplating. Because the appearance and serviceability of zinc coatings depends on the surface condition of the basis metal, agreement should be reached between the interested parties that the surface finish of the basis metal is satisfactory for electroplating. Chromate conversion coatings are omitted, or replaced by other conversion coatings, at the specific request of the purchaser. This International Standard provides the codes for all types of chromate conversion and other supplementary coatings. Chemical conversion coatings that do not contain hexavalent chromium or are chromium-free, conforming to this International Standard, are commercially available. The appearance of these substitutes may be different from those produced with hexavalent chromium. All forms of chromate conversion coatings, alternative conversion coatings or substitutes, with the exception of phosphate coatings, can be used and are required to satisfy the corrosion requirements given in this International Standard. Standard designations for metals and alloys can be found in References [6] to [10] in the Bibliography.
INTERNATIONAL STANDARD ISO 2081:2008(E) © ISO 2008 – All rights reserved 1Metallic and other inorganic coatings — Electroplated coatings of zinc with supplementary treatments on iron or steel WARNING — This International Standard may not be compliant with some countries’ health, safety and environmental legislations and calls for the use of substances and/or procedures that may be injurious to health if adequate safety measures are not taken. This International Standard does not address
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