1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58a
2、pplied zinc flake coatings on iron or steel componentsICS 25.220.40Corrosion protection of metals Non-electrolytically BRITISH STANDARDBS EN 13858:2006BS EN 13858:2006Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIThis British Standard was publishe
3、d under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008ISBN 978 0 580 54308 1Amendments/corrigenda issued since publicationDate Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from le
4、gal obligations.National forewordThis British Standard is the UK implementation of EN 13858:2006. It supersedes BS EN 13858:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations repre
5、sented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13858November 2006ICS 25.220.40 Supersedes EN 13858:2003 English VersionCorrosion protection of metals
6、 - 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 en acierKorrosionsschutz von Metallen - Nicht elektrolytischaufgebrachte schuppenfrmige Zinkberzge auf
7、Werkstcken 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 for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date l
8、ists 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 versions (English, French, German). A version in any other language made by translationunder the respon
9、sibility 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland,
10、Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-105
11、0 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13858:2006: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 13858:2006 (E) 2 Contents Page Foreword3 Introduction
12、.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 C (
13、normative) Sampling 12 Bibliography 13 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 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 secret
14、ariat 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 May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. This document supersedes E
15、N 13858:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Ita
16、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 13858:2006 (E) 4 Introduction The purpose
17、 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 incorporate an integral lubricant, for improving lubricity. Variations in colour or lubricity are obtain
18、ed 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 by pneumatic or electrostatic gun-spraying of the coating liquid, followed by curing. Coating processes b
19、y 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. Mechanical cleaning methods of the metal surfaces are preferred for steels parts having a tensile streng
20、th 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 steels (Rm 1 000 MPa) if they contain tensile stresses (see Clause 6.1.2). Zinc protects steel by galvanic ac
21、tion, 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 voluminous and plug the pores in the coating to provide barrier protection. Apart from cathodic corrosion prote
22、ction, 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 protection. However, the duration and results of accelerated corrosion tests, such as the neutral salt spr
23、ay 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 health if adequate safety measures are not taken. This European Standard does not address any health hazards,
24、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 suitable actions for any national and International regulations. Licensed Copy: Wang Bin, ISO/EXCHANGE CHIN
25、A STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 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. These coat
26、ings 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 coati
27、ngs 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 strength over
28、 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. For u
29、ndated 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 Definitions
30、 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 (all p
31、arts), 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 2064:200
32、0 and EN ISO 16348:2003 apply. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 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
33、steel conforming to this European Standard, the purchaser shall provide the following information 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 metallurg
34、ical condition of the component (heat treatment, hardness and/or other characteristics), which 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,
35、 recesses and presence of rack marks; NOTE Requirements for coating thickness on the non-significant 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 ar
36、eas shall be agreed between supplier and purchaser; f) tensile strength of the component and 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
37、(see Table 1) and coating adhesion (see 6.2.3); h) requirement of supplementary coating, e.g. 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 us
38、ing integral coating lubricants, or lubricants applied after coatings; k) sampling and inspection 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 (
39、-); d) chemical symbol of the basis metal; e) stroke (/); f) symbols for the zinc flake coating 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
40、. The coating designation includes the thickness of the coating in micrometers (m). Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy, (c) BSIEN 13858:2006 (E) 7 5.2 Basis metal The basis metal shall be designated by its chemical symbol or its principal const
41、ituent 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 or regional equivalent) placed between the symbols “”, for example, Fe. 5.3 Pre-process stress relief heat tr
42、eatment 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, and the time in hours. The temperature shall be in parenthesis after the letters, SR; for example, SR (210) 3.
43、 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, varnishes or similar coatings; T2 organic or inorganic sealants; T3 colour; T4 oil or other lubricants. 5.4.2 Thickn
44、ess 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” for immersion and pneumatic application processes respectively, followed by a number giving the minimum loc
45、al 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 zinc flake coating shall be in accordance with Table 1. 5.4.3 Examples of coating designations A non-electro
46、lytically 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-electrolytically deposited zinc flake coating, without chromate, applied by pneumatic process, of 8 m thick on
47、 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(210)3/pflZn8/nc/T2 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 13/05/2008 07:56, Uncontrolled Copy,
48、 (c) BSIEN 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, shall be f
49、ree 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 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
