EN ISO 2081-2018 en Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary treatments on iron or steel.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Metallic and other inorganic coatingsElectroplated coatings of zinc with supplementary treatments on iron or steelBS EN ISO 2081:2018National forewordThis British Standard is the UK implementation of EN ISO 2081:2018. I

2、t is identical to ISO 2081:2018. It supersedes BS EN ISO 2081:2008, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented on this committee can be obtained on request to its se

3、cretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 91431 7ICS 25.220.40Compliance with a British Standard cann

4、ot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 2081:2018EUROPEAN STANDARDNORME EUROPENNEEUROPI

5、SCHE NORMEN ISO 2081March 2018ICS 25.220.40 Supersedes EN ISO 2081:2008EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 2081:2018: EAll rights of exploitation in

6、 any form and by any means reserved worldwide for CEN national MembersMetallic and other inorganic coatings Electroplated coatings of zinc with supplementary treatments on iron or steel (ISO 2081:2018)Revtements mtalliques et autres revtements inorganiques Dpts lectrolytiques de zinc avec traitement

7、s supplmentaires sur fer ou acier (ISO 2081:2018)Metallische und andere anorganische berzge Galvanische Zinkberzge auf Eisenwerkstoffen mit zustzlicher Behandlung (ISO 2081:2018)This European Standard was approved by CEN on 15 February 2018.CEN members are bound to comply with the CEN/CENELEC Intern

8、al Regulations which stipulate the conditions for giving this European Standard 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 C

9、EN member.This European Standard exists in three official versions (English, 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 versi

10、ons.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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, Po

11、land, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 2081:2018 (E)European forewordThis document (EN ISO 2081:2018) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“ in collaboration

12、 with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys” 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 ide

13、ntical text or by endorsement, at the latest by September 2018, and conflicting national standards shall be withdrawn at the latest by September 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsibl

14、e for identifying any or all such patent rights.This document supersedes EN ISO 2081:2008.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Cze

15、ch 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Unite

16、d Kingdom.Endorsement noticeThe text of ISO 2081:2018 has been approved by CEN as EN ISO 2081:2018 without any modification.2BS EN ISO 2081:2018ISO 2081:2018Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms, definitions, abbreviated terms and symbols . 23.1 Terms and definitions .

17、23.2 Abbreviated terms . 23.3 Symbols . 24 Information to be supplied by the purchaser to the electroplater 24.1 Essential information 24.2 Additional information 35 Designation 35.1 General . 35.2 Designation specification . 35.3 Designation of the basis material 45.4 Designation of heat treatment

18、requirements . 46 Requirements 56.1 Appearance 56.2 Thickness . 56.3 Trivalent chromium conversion coatings and other supplementary treatments . 56.4 Adhesion of zinc and trivalent chromium conversion coatings 56.5 Accelerated corrosion testing 66.5.1 Neutral salt spray test 66.5.2 Corrosion rating

19、. 66.6 Stress relief heat treatments before cleaning and metal deposition 66.7 Hydrogen-embrittlement-relief heat treatments after electroplating 77 Sampling 7Annex A (normative) Designation of supplementary treatments . 8Annex B (normative) Measurement of average thickness of coating on small artic

20、les 10Bibliography .11 ISO 2018 All rights reserved iiiContents PageBS EN ISO 2081:2018ISO 2081:2018ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally c

21、arried 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 wor

22、k. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all 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 diff

23、erent approval criteria needed for the different types of ISO documents should be noted. This 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 ma

24、y be the subject of patent rights. ISO shall not be held responsible for identifying any or 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/paten

25、ts).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about

26、 ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 262, Metallic and other inorganic c

27、oatings, in collaboration with ISO Technical Committee TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes, in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement).This fourth edition cancels and re

28、places the third edition (ISO 2081:2008), which has been technically revised. The following main changes have been made: the number of normative references has been reduced; reference to ASTM B117 has been replaced with ISO 9227; some abbreviated terms have been removed; coating designations have be

29、en modified; reference to ISO 1463 for thickness measurement has been increased; reference to use of trivalent chromium has been increased reference to use of hexavalent chromium has been reduced; reference to ISO 19598 in relation to supplementary Cr(VI)-free treatment has been added; Tables 1 and

30、2 have been replaced with a revised Table 1 on neutral salt spray corrosion resistance; reference to ISO 15330 in relation to hydrogen embrittlement testing has been added; supplementary treatment designations have been modified; Annex C has been removed.iv ISO 2018 All rights reservedBS EN ISO 2081

31、:2018ISO 2081:2018IntroductionZinc 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

32、 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

33、. The type of service condition should, therefore, be taken into consideration when specifying the minimum coating thickness. Trivalent chromate conversion coatings and other supplementary treatments enhance the corrosion resistance of electrodeposited zinc coatings and are commonly applied after el

34、ectroplating.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.Trivalent chromate conversion coatings

35、 are omitted, or replaced by other conversion coatings, at the specific request of the purchaser. This document provides the codes for all types of chromate conversion and other supplementary coatings.With reference to Cr(VI)-free conversion coatings, attention is drawn to ISO 19598. ISO 19598 is ap

36、plicable to zinc, zinc-iron and zinc-nickel plating, where only trivalent systems are required.Due to the REACH Regulations the use of hexavalent chromium compounds will be banned in Europe from September 2017 except where specifically authorized. Alternative conversion coatings or substitutes, can

37、be used and are required to satisfy the corrosion requirements given in this document.Standard designations for metals and alloys can be found in References 12 to 16. ISO 2018 All rights reserved vBS EN ISO 2081:2018This page deliberately left blankMetallic and other inorganic coatingsElectroplated

38、coatings of zinc with supplementary treatments on iron or steelWARNING This document calls for the use of substances and/or procedures that can be injurious to health if adequate safety measures are not taken. This document does not address any health hazards, safety or environmental matters associa

39、ted with its use. It is the responsibility of the producers, purchasers and/or user of this document to establish appropriate health, safety and environmentally acceptable practices.1 ScopeThis document specifies requirements for electroplated coatings of zinc with supplementary treatments on iron o

40、r steel. It includes information to be supplied by the purchaser to the electroplater, and the requirements for heat treatment before and after electroplating.It is not applicable to zinc coatings applied to sheet, strip or wire in the non-fabricated form, to close-coiled springs, or for purposes ot

41、her than protective or decorative.This document does not specify requirements for the surface condition of the basis metal prior to electroplating with zinc. However, defects in the surface of the basis metal can adversely affect the appearance and performance of the coating.The coating thickness th

42、at can be applied to threaded components can be limited by dimensional requirements, including class or fit.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only

43、the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical methodISO 2064, Metallic and other inorganic coatings Definitions and conventions c

44、oncerning the measurement of thicknessISO 2080, Metallic and other inorganic coatings Surface treatment, metallic and other inorganic coatings VocabularyISO 2819, Metallic coatings on metallic substrates Electrodeposited and chemically deposited coatings Review of methods available for testing adhes

45、ionISO 3613, Metallic and other inorganic coatings Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys Test methodsISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributesISO 9227, Corrosion tests in

46、 artificial atmospheres Salt spray testsINTERNATIONAL STANDARD ISO 2081:2018 ISO 2018 All rights reserved 1BS EN ISO 2081:2018ISO 2081:2018ISO 9587, Metallic and other inorganic coatings Pretreatment of iron or steel to reduce the risk of hydrogen embrittlementISO 9588, Metallic and other inorganic

47、coatings Post-coating treatments of iron or steel to reduce the risk of hydrogen embrittlementISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rating of test specimens and manufactured articles subjected to corrosion testsISO 10587, Metallic an

48、d other inorganic coatings Test for residual embrittlement in both metallic-coated and uncoated externally-threaded articles and rods Inclined wedge methodISO 15330, Fasteners Preloading test for the detection of hydrogen embrittlement Parallel bearing surface methodISO 15724, Metallic and other ino

49、rganic coatings Electrochemical measurement of diffusible hydrogen in steels Barnacle electrode method3 Terms, definitions, abbreviated terms and symbols3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 2064 and ISO 2080 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.i