EN 13858-2006 en Corrosion protection of metals - Non-electrolytically applied zinc flake coatings on iron or steel components《金属腐蚀防护 钢或铁元件上非电解锌片涂覆层》.pdf

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1、BRITISH STANDARDBS EN 13858:2006Corrosion protection of metals Non-electrolytically applied zinc flake coatings on iron or steel componentsICS 25.220.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g4

2、0g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 13858:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008ISBN 978 0 580 54308 1National forewordThis British Standard is the UK implementation of EN 13858:2006.

3、It supersedes BS EN 13858:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented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 secretary.This publication does not pur

4、port to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN

5、13858November 2006ICS 25.220.40 Supersedes EN 13858:2003 English VersionCorrosion protection of metals - Non-electrolytically applied zincflake coatings on iron or steel componentsProtection des mtaux contre la corrosion - Revtementsnon lectrolytiques de lamelles de zinc sur des composantsen fer ou

6、en acierKorrosionsschutz von Metallen - Nicht elektrolytischaufgebrachte schuppenfrmige Zinkberzge aufWerkstcken aus Eisen oder StahlThis European Standard was approved by CEN on 6 October 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f

7、or 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 Central Secretariat or to any CEN member.This European Standard exists in three official v

8、ersions (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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium,

9、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 STANDARDIZATIONCO

10、MIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13858:2006: EEN 13858:2006 (E) 2 Contents Page Foreword3 Introducti

11、on .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Information to be supplied by the purchaser to the processor 6 5 Designations 6 6 Requirements.8 7 Sampling.9 Annex A (informative) Additional information concerning coatings .10 Annex B (normative) Adhesion test methods.11 Annex

12、C (normative) Sampling 12 Bibliography 13 EN 13858:2006 (E) 3 Foreword This document (EN 13858:2006) has been prepared by Technical 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 st

13、andard, either by publication of an identical text or by endorsement, at the latest by May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. This document supersedes EN 13858:2003. According to the CEN/CENELEC Internal Regulations, the national standards organiza

14、tions of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovak

15、ia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13858:2006 (E) 4 Introduction The purpose of non-electrolytically applied zinc flake coatings, which may contain a small proportion of aluminium flakes, is for corrosion protection of steel components. If needed, these coatings may also

16、 incorporate an integral lubricant, for improving lubricity. Variations in colour or lubricity are obtained by applying a suitable supplementary coating to zinc flake-based coatings. The non-electrolytically applied zinc flake coatings for iron and steel components are obtained by cold immersion or

17、by pneumatic or electrostatic gun-spraying of the coating liquid, followed by curing. Coating processes by cold immersion ensure complete coverage of components, even with complex shapes. These coatings are not suitable for components that are used at temperatures higher than the curing temperature.

18、 Mechanical cleaning methods of the metal surfaces are preferred for steels parts having a tensile strength of 1 000 MPa and greater (Rm 1 000 MPa) to avoid the risk of hydrogen embrittlement. If acid chemical cleaning methods are used, stress relief heat treatment is required for high strength stee

19、ls (Rm 1 000 MPa) if they contain tensile stresses (see Clause 6.1.2). Zinc protects steel by galvanic action, i.e. sacrificial action takes place to protect steel when it is in close contact with the steel, and after weathering, zinc oxides are formed on the coating surface. These oxides are volumi

20、nous and plug the pores in the coating to provide barrier protection. Apart from cathodic corrosion protection, the zinc flakes also provide barrier properties due to the platelet structures. Artificial atmosphere corrosion tests of these coatings can provide some measure of guidance for corrosion p

21、rotection. However, the duration and results of accelerated corrosion tests, such as the neutral salt spray test, have no direct relation to the corrosion protection in other environments. WARNING This European Standard calls for the use of substances and/or procedures that may be injurious to healt

22、h if adequate safety measures are not taken. This European Standard does not address any health hazards, safety matters or environmental conditions associated with its use. It is the responsibility of the user of this European Standard to establish appropriate health and safety practices and take su

23、itable actions for any national and International regulations. EN 13858:2006 (E) 5 1 Scope This European Standard specifies requirements for non-electrolytically applied coatings, composed mainly of zinc flakes, for protection against corrosion of steel components, excluding threaded fasteners. Thes

24、e coatings may also be provided with integral lubricant if needed. NOTE 1 Requirements for threaded fasteners are given in EN ISO 10683. The temperature and duration of curing the coating can influence the mechanical properties of components because of their change of metallurgical conditions. These

25、 coatings should not be applied to components that can be used at temperatures higher than the curing temperature, unless specifically ordered. NOTE 2 If aluminium flakes, when added to zinc flake dispersion, form a continuous bond, a high risk of hydrogen embrittlement for steels of tensile strengt

26、h over 1 800 MPa may exist because of the sacrificial action of the coating during corrosion reactions in storage and/or in service. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.

27、 For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60454-2, Specifications for pressure-sensitive adhesive tapes for electrical purposes Part 2: Methods of test (IEC 60454-2:1994) EN ISO 2064:2000, Metallic and other inorganic coatings Defin

28、itions and conventions concerning the measurement of thickness (ISO 2064:1996) EN ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests (ISO 9227:2006) EN ISO 16348:2003, Metallic and other inorganic coatings Definitions and conventions concerning appearance (ISO 16348:2003) ISO 2859

29、(all parts), Sampling procedures and tables for inspection by attributes ISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN ISO 20

30、64:2000 and EN ISO 16348:2003 apply. EN 13858:2006 (E) 6 4 Information to be supplied by the purchaser to the processor When ordering articles for non-electrolytically applied zinc flake coatings on iron or steel conforming to this European Standard, the purchaser shall provide the following informa

31、tion in writing in the contract, purchase order or in the engineering drawing: a) number and date of this European Standard, i.e. EN 13858: 2006; b) designation (see clause 5); c) specification and metallurgical condition of the component (heat treatment, hardness and/or other characteristics), whic

32、h may be influenced by the coating process, and any process temperature limitation; d) significant surface and the requirement of coating thickness on the significant surface, including the coating of holes, recesses and presence of rack marks; NOTE Requirements for coating thickness on the non-sign

33、ificant surface and the presence of uncoated areas can also be specified (see 6.2.1); e) requirement of dimensional tolerances including any excesses of coatings in complicated shapes of components; these areas shall be agreed between supplier and purchaser; f) tensile strength of the component and

34、requirement of stress relief heat treatment; g) requirements of the type of coating processes (see Annex A), type of coating (with aluminium flakes or without aluminium flakes, see 6.1.3), coating thickness (see Table 1) and coating adhesion (see 6.2.3); h) requirement of supplementary coating, e.g.

35、 sealants, lubricants, colours, etc. (see 6.2.4); i) requirement of accelerated corrosion test (see clause 6.3); j) requirement of any additional tests or performance tests for lubricated coatings whether using integral coating lubricants, or lubricants applied after coatings; k) sampling and inspec

36、tion requirements (see clause 7). 5 Designations 5.1 General The designation shall consist of the following: a) term “non-electrolytically applied”; b) number of this European Standard, EN 13858; c) hyphen (-); d) chemical symbol of the basis metal; e) stroke (/); f) symbols for the zinc flake coati

37、ng and the method of application (see 5.4.1), as well as any coatings that may be applied prior to or after deposition, separated by strokes for each stage in the coating sequence in the order of application. The coating designation includes the thickness of the coating in micrometers (m). EN 13858:

38、2006 (E) 7 5.2 Basis metal The basis metal shall be designated by its chemical symbol or its principal constituent if an alloy. For example, Fe for iron and steel. The specific alloy may be identified by its standard designation (for example, its UNS number as given in ASTM DS-56G, or its national o

39、r regional equivalent) placed between the symbols “”, for example, Fe. 5.3 Pre-process stress relief heat treatment Stress relief heat treatment prior to application of a coating may be required for some basis materials. Brackets shall be placed around the letters, SR, the temperature in Celsius, an

40、d the time in hours. The temperature shall be in parenthesis after the letters, SR; for example, SR (210) 3. 5.4 Type and thickness of coatings 5.4.1 Type of coating i immersion application; p pneumatic application; fl flake; yc coating with chromate; nc coating without chromate; T1 paints, varnishe

41、s or similar coatings; T2 organic or inorganic sealants; T3 colour; T4 oil or other lubricants. 5.4.2 Thickness of coating Non-electrolytically applied zinc flake coating, by immersion or pneumatic processes, shall be designated by the symbol “Zn“ with the prefix “fl“ and a further prefix “i“ or “p”

42、 for immersion and pneumatic application processes respectively, followed by a number giving the minimum local thickness of the coating in m. For example, iflZn4 or pflZn4 designate zinc flake coatings with 4 m thickness by immersion or pneumatic processes respectively. The minimum thickness of the

43、zinc flake coating shall be in accordance with Table 1. 5.4.3 Examples of coating designations A non-electrolytically deposited zinc flake coating, applied by immersion process, of 4 m thick on steel (Fe), with chromates: Non-electrolytically applied zinc flake coating EN 13858 Fe/iflZn4/yc A non-el

44、ectrolytically deposited zinc flake coating, without chromate, applied by pneumatic process, of 8 m thick on high strength steel that is stress relieved at 210 C for 3 h before the application of the coating with organic sealant (T2): Non-electrolytically applied zinc flake coating EN 13858 Fe/SR(21

45、0)3/pflZn8/nc/T2 EN 13858:2006 (E) 8 6 Requirements 6.1 General 6.1.1 Basis material This European Standard does not specify requirements for the condition, finish and surface roughness of the basis metal prior to the application of non-electrolytically zinc flakes. Surfaces to be coated, however, s

46、hall be free from oxides, pitting, tool marks, intergranular attack, or other defects and shall be clean and dry. If necessary, cleaning can be by chemical or mechanical means. NOTE When processing higher tensile parts (Rm 1 000 MPa) mechanical cleaning is preferred to ensure that no hydrogen can be

47、 absorbed by the parts. 6.1.2 Stress relief heat treatment before coating Steel parts with an ultimate tensile strength of 1 000 MPa and greater (Rm 1 000 MPa), that contain tensile stresses caused by machining, grinding or cold forming operations, shall be given a stress relief heat treatment prior

48、 to cleaning and deposition of the coating, in accordance with ISO 9587 or as specified by the purchaser (see clause 4 f). 6.1.3 Type of coating The coating is produced by applying to the surface of a component a zinc flake dispersion, with or without addition of aluminium flakes, in a suitable liqu

49、id medium. It may or may not contain chromate or have supplementary coatings (see clause 4 g) and 4 h). If the coating contains aluminium flakes, it shall be specified (see 4g). 6.1.4 Curing The curing temperatures and duration period shall be as required for the composition of the coating material. NOTE The temperature is generally above 180 C and the curing period is between 15 min to 60 min. The curing temperature and/or its duration is not a substitute for stress relief heat treatment. 6.2 Coating requirements 6.2.1 Appearance The coa