EN ISO 12683-2004 en Mechanically deposited coatings of zinc - Specification and test methods《机械镀锌涂层 规范和试验方法 ISO 12683-2004》.pdf

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1、BRITISH STANDARD BS EN ISO 12683:2004 Mechanically deposited coatings of zinc Specification and test methods The European Standard EN ISO 12683:2004 has the status of a British Standard ICS 25.220.40 BS EN ISO 12683:2004 This British Standard was published under the authority of the Standards Policy

2、 and Strategy Committee on 25 November 2004 BSI 25 November 2004 ISBN 0 580 44856 8 National foreword This British Standard is the official English language version of EN ISO 12683:2004. It is identical with ISO 12683:2004. The UK participation in its preparation was entrusted to Technical Committee

3、 STI/41, Sherardized, vapour deposited and mechanically deposited coatings, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publication

4、s referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary

5、 provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpret

6、ation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 16, an inside back cover and a b

7、ack cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO12683 November2004 ICS25.220.40 Englishversion Mechanicallydepositedcoatingsofzinc

8、Specificationandtest methods(ISO12683:2004) Dptsdezincparvoiemcanique(matoplastie) Spcificationsetmthodesdecontrle(ISO12683:2004) DurchmechanischesPlattierenaufgebrachteZinkberzge AnforderungenundPrfverfahren(ISO12683:2004) ThisEuropeanStandardwasapprovedbyCENon24June2004. CENmembersareboundtocomply

9、withtheCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanSta

10、ndardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechR

11、epublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFR

12、NORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO12683:2004:EEN ISO 12683:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 Information and

13、 requirements to be agreed and documented by the purchaser .5 4.1 General5 4.2 Essential information 5 4.3 Additional information 5 5 Substrate 6 6 Classification and designation of coatings 6 6.1 Service condition number.6 6.2 Class of zinc coating thickness and type of supplementary treatment.6 7

14、Requirements for pretreatments7 7.1 Stress relief treatment before coating.7 7.2 Cleaning7 8 Inspection .7 8.1 Appearance 7 8.2 Surface defects 7 8.3 Thickness .7 8.4 Adhesion.8 8.5 Corrosion resistance in accelerated salt spray test 8 8.6 Absence of hydrogen embrittlement .10 9 Sampling.10 10 Rejec

15、tion.11 11 Attestation of conformity 11 11.1 General11 11.2 Normal conditions .11 11.3 Specific conditions11 Annex A (informative) Additional information12 A.1 Coating application process.12 A.2 Coating corrosion resistance characteristics in outdoor environments.12 A.3 Specific supplementary coatin

16、g types 13 A.3.1 Coating Type 1 .13 A.3.2 Coating Type 2 .13 A.3.3 Coating Type 3 .13 A.4 Relationship between coating weight and thickness 14 Annex B (normative) Zinc dust/powder specification15 Bibliography 16 EN ISO 12683:2004 (E) 3 Foreword This document (EN ISO 12683:2004) has been prepared by

17、Technical Committee CEN/TC 262 “Metallic and other inorganic coatings”, the Secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 107 “Metallic and other inorganic coatings”. This European Standard shall be given the status of a national standard, either by publicatio

18、n of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europea

19、n Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 12683:20

20、04 (E) 4 1 Scope This document specifies the requirements for coatings of zinc that have been mechanically deposited on to fabricated metal articles to protect them from corrosion. It also describes the related test methods. NOTE Annex A describes the process of applying a metal coating that is call

21、ed mechanical deposition. In this instance the metal applied is zinc. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d

22、ocument (including any amendments) applies. EN ISO 1463, Metallic and oxide coatings - Measurement of coating thickness - Microscopical method (ISO 1463:2003) EN ISO 2064:2000, Metallic and other inorganic coatings - Definitions and conventions concerning the measurement of thickness (ISO 2064:1996)

23、 EN ISO 2177, Metallic coatings - Measurement of coating thickness - Coulometric method by anodic dissolution (ISO 2177:2003) EN ISO 2178, Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method (ISO 2178:1982) EN ISO 3497, Metallic coatings - Measurement of

24、 coating thickness - X-ray spectrometric methods (ISO 3497:2000) EN ISO 9220, Metallic coatings - Measurement of coating thickness - Scanning electron microscope method (ISO 9220:1988) EN ISO 10111, Metallic and other inorganic coatings - Measurement of mass per unit area - Review of gravimetric and

25、 chemical analysis methods (ISO 10111:2000) ISO 2079:1981, Surface treatment and metallic coatings General classification of terms ISO 2080:1981, Electroplating and related processes Vocabulary ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptabl

26、e quality level (AQL) for lot-by-lot inspection ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests ISO 9587, Metallic and other inorganic coatings Pretreatments of iron or steel to reduce the risk of hydrogen embrittlement ISO 10474, Steel and steel products Inspection documents IS

27、O 10587, Metallic and other inorganic coatings Test for residual embrittlement in metallic-coated and uncoated externally threaded articles and rods Inclined wedge method EN ISO 12683:2004 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 2064

28、:2000, ISO 2079:1981 and ISO 2080:1981 and the following apply 3.1 mechanically deposited coating coating obtained by compacting metallic powder particles onto correctly prepared metallic substrates in a rotating barrel in the presence of impact media (normally glass beads) and in a suitable chemica

29、l environment without the use of an electric current or applied heat 3.2 apparent coating density product of thickness, determined in accordance with EN ISO 1463, and mass per unit area, determined in accordance with EN ISO 10111 4 Information and requirements to be agreed and documented by the purc

30、haser 4.1 General The following items to be agreed between the contracting parties, which are specified in the clauses referred to, shall be fully documented. Both the definitive requirements specified in this document and the documented items listed in 4.2 and 4.3 shall be satisfied before a claim

31、of compliance can be made and verified. 4.2 Essential information The following information shall be given: a) number of this document; b) nature of the basis material, its surface condition and roughness; c) tensile strength of the article and before any requirements for stress relief before coatin

32、g (see 7.1 and 7.2); d) service condition number (see 6.1) or the classification code of the coating (see 6.2); e) any supplementary finish required (see 6.2 and A.3); f) acceptability and positions of defects on non-significant surfaces (see 8.2); g) location at which coating thickness shall be mea

33、sured, any maximum thickness if appropriate, and the test method to be used (see 8.3); h) sampling procedure to be adopted (see Clause 9); i) method for testing adhesion (see 8.4); j) requirement for an attestation of conformity (see Clause 11); k) any special requirements for appearance (see 8.1).

34、4.3 Additional information The following additional information may be required and, if so, shall be specified by the purchaser: a) any special post-plating treatment (see A.3); EN ISO 12683:2004 (E) 6 b) any special packaging requirements for the coated articles; c) requirement for any test report

35、other than that specified. 5 Substrate This document specifies no requirement for the condition, finish or surface roughness of the basis metal prior to mechanical zinc plating. However, it should be recognized that the surface roughness of the coated surface will be dependent on the initial roughne

36、ss of the basis metal, and therefore this shall not be a cause for rejection of the mechanical zinc plated coating. 6 Classification and designation of coatings 6.1 Service condition number The service condition number shall be used to indicate the severity of the service conditions in accordance wi

37、th Table 1 (see EN 12500:2000, Annex E). 6.2 Class of zinc coating thickness and type of supplementary treatment The zinc coatings shall be classified on the basis of thickness and the supplementary treatment required in accordance with Tables 1 and 2. Table 1 Minimum coating thickness for mechanica

38、l zinc coating Class Minimum coating thickness (m) Zn 110 M(Fe) 107 Zn 80 M(Fe) 81 Zn 65 M(Fe) 66 Zn 50 M(Fe) 53 Zn 40 M(Fe) 40 Zn 25 M(Fe) 25 Zn 12 M(Fe) 12 Zn 8 M(Fe) 8 Zn 6 M(Fe) 6 Table 2 Supplementary coating finishing Type Description 1 As coated, without supplementary treatment 2 With a yello

39、w, opaque green or black coloured chromate conversion treatment 3 With complementary treatment, as specified by the purchaser EN ISO 12683:2004 (E) 7 7 Requirements for pretreatments 7.1 Stress relief treatment before coating When specified by the purchaser, steel parts that have an ultimate tensile

40、 strength equal to or greater than 1000 Mpa (31 HRc) and that contain tensile stresses caused by machining, grinding, straightening, or cold forming operations shall be given a stress relief treatment prior to cleaning and metal deposition. The procedures and classes for stress relief heat treatment

41、 shall be as specified by the purchaser or the purchaser may specify appropriate procedures and classes from ISO 9587. Stress relief heat treatment shall be carried out before any electrolytic treatments are applied. 7.2 Cleaning High strength steels, which become embrittled when charged with hydrog

42、en, shall be cleaned before application of the coating in non-electrolytic alkaline, anodic-alkaline processes. High strength steels that have heavy oxide or scale on them shall be further cleaned using inhibited acid processes to avoid the risk of producing hydrogen embrittlement. 8 Inspection 8.1

43、Appearance When examined by the unaided eye or corrected vision the significant surfaces of the coated articles shall be free from any visible defects such as blisters, pits, roughness, cracks or uncoated areas and shall not be stained or discoloured. The acceptability and positions of defects on no

44、n-significant surfaces shall be specified by the purchaser. The coatings deposited shall have a uniform silvery appearance, and a matte to medium bright lustre. NOTE Applied finishes generally perform better in service when the substrate over which they are applied is smooth and free of torn metal,

45、inclusions, pores, and other defects. A metal finisher can often remove defects through special treatments such as grinding, polishing, abrasive blasting, chemical treatments, and electropolishing. However, these are not in the normal treatment steps preceding application of the finish. When desired

46、 they shall be specified by the purchaser. 8.2 Surface defects Defects and variations in appearance in the coating that arise from surface condition of the substrate (scratches, pores, roll marks, inclusions, etc.) and finishing practices shall not be cause for rejection. The coating shall be unifor

47、m in appearance and substantially free of blisters, pits, nodules, flaking, and other defects that can adversely affect the function of the coating. The coating shall cover all surfaces including roots of threads, thread peaks, corners and edges. The coating shall not be discoloured throughout to an

48、 extent that would adversely affect appearance as a functional requirement. However, superficial staining that results from rinsing and variations in colour or lustre shall not be cause for rejection. NOTE The nature of the mechanical plating process is such that the coatings are generally not as smooth or as bright as some electroplated coatings. 8.3 Thickness The thickness over the entire significant surface shall be measured in accordance with the following standards within the conventions defined in EN ISO 2064. EN ISO 12683:2004 (E) 8 The thicknes