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1、BS EN 15646:2009 ICS 25.220.40, NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Electrodeposited coatings Electroplated coatings of aluminium and aluminium alloys with supplementary treatment Requirements and test methods Licensed CopyChinese University of Hon
2、g Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2009 BSI 2009 ISBN 978 0 580 58335 3 Amendments/corrigenda issued since publication DateComments BS EN 15646:2009 National foreword
3、This British Standard is the UK implementation of EN 15646:2009. 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 publica
4、tion does not purport 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. Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI
5、 BS EN 15646:2009BS EN 15646:2009BS EN 15646:2009 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15646 March 2009 ICS 25.220.40 English Version Electrodeposited coatings - Electroplated coatings of aluminium and aluminium alloys with supplementary treatment - Requirements and test methods Revt
6、ements lectrolytiques - Dpts lectrolytiques daluminium et dalliages daluminium avec traitement complmentaire - Exigences et mthodes dessai Galvanische berzge - Galvanische Aluminium- und Aluminium-Legierungs-berzge mit zustzlicher Behandlung - Anforderungen und Prfverfahren This European Standard wa
7、s approved by CEN on 14 February 2009. CEN members are bound to comply with the CEN/CENELEC Internal 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
8、national standards 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 translation under the responsibility of a CEN member into its own language
9、and notified to the CEN Management Centre has the same status as the official 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, Luxemb
10、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CENAll rights
11、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15646:2009: E Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15646:2009BS EN 15646:2009 EN 15646:2009 (E) 2 Contents Page Foreword
12、4? Introduction .5? 1?Scope 7? 2?Normative references 7? 3?Terms and definitions .7? 4?Information to be supplied by the purchaser .8? 4.1?Essential information 8? 4.2?Additional information 8? 5?Designation 8? 5.1?General 8? 5.2?Substrate 9? 5.3?Metallic coatings 9? 5.3.1?General 9? 5.3.2?Intermedi
13、ate coatings . 10? 5.4?Heat treatment . 10? 5.5?Supplementary treatment 10? 5.5.1?General . 10? 5.5.2?Conversion coatings 10? 5.5.3?Other supplementary treatments 10? 5.6?Designation examples 10? 6?Coating types and application . 11? 6.1?Aluminium coatings 11? 6.2?Aluminium alloy coatings 11? 7?Requ
14、irements 11? 7.1?General . 11? 7.2?Appearance . 12? 7.3?Coating thickness . 12? 7.4?Adhesion 12? 7.5?Corrosion resistance in accelerated salt spray test . 12? 7.5.1?General . 12? 7.5.2?Samples . 13? 7.5.3?Requirements for corrosion resistance . 13? 7.6?Corrective actions. 13? 8?Test methods . 13? 9?
15、Sampling 14? Annex A (normative) Corrosion tests 15? A.1?Alternating immersion test in accordance with EN ISO 11130:1999 . 15? A.2?Test solution 15? A.3?Standard atmosphere . 15? A.4?Test . 15? Annex B (informative) Fields of application 16? B.1?Riveted joints, retaining ring bolts 16? B.2?Welded co
16、mponents, e.g. welding studs . 16? B.3?High temperature applications 16? B.4?Sea water resistance 16? B.5?Aerospace 16? Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15646:2009BS EN 15646:2009 EN 15646:2009 (E) 3 Annex C (informative
17、) General process information . 17? C.1?Procedure . 17? C.2?Surface pretreatment 17? C.3?Coating systems 18? Bibliography 19? Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15646:2009BS EN 15646:2009 EN 15646:2009 (E) 4 Foreword This
18、document (EN 15646:2009) 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 standard, either by publication of an identical text or by endorsement, at the
19、 latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any
20、 or all such patent rights. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungar
21、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15
22、646:2009BS EN 15646:2009 EN 15646:2009 (E) 5 Introduction Electroplating of aluminium and aluminium alloy coatings provides several advantages: coating temperature (approximately 80 C to 100 C); no hydrogen embrittlement due to the electrodeposition of aluminium. Prevention of hydrogen embrittlement
23、 results from the (process) technology of electroplating, because it is conducted in aprotic, organic solvents, in which the aluminium is dissolved as an aluminium-organic complex. To protect these electroplating solutions from humidity (water) and air oxygen, the electroplating of aluminium is perf
24、ormed under an inert gas atmosphere of nitrogen or argon. For anodic material aluminium is used, which has a purity of 99,7 %. During electroplating of aluminium a purification (electrolytic refining) takes place, which results in an aluminium coating with a purity of 99,99 % Al percentage by mass.
25、The high level of purity of the aluminium forms the basis for corrosion protection. The corrosion protection of the aluminium coating can be increased by common procedures of aluminium after-treatment, e.g. conversion coatings. The corrosion behaviour in chlorine-containing media is based on the fac
26、t that pure aluminium has a low self- corrosion because the aluminium is passivated by a thin oxide layer due to air oxygen. The oxide layer of the pure-aluminium coating is stable in the pH range from 4,0 to 8,5. Corrosion damage does not result in voluminous corrosion products. The electrodeposite
27、d aluminium coatings cathodically protect iron materials. However, polarization effects in chlorine-free media, e.g. condensed water, may result in an anodic protective behaviour in such electrolytes. This effect can be reduced by alloying, for example, zinc or magnesium to the aluminium. Due to low
28、 dissolution current densities and extensive freedom of pores, the coatings can be suitable as galvanic corrosion protection on less reactive (more precious) materials like stainless steels and copper alloys. For adhesion reasons the application of a nickel strike may become necessary. High ductilit
29、y of the coatings allows an extreme deformation of the work pieces in the electroplated state. The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that compliance with this document may involve the use of a patent concerning the use of individual electroly
30、te (electroplating solution) formulations to electrodeposit aluminium and/or aluminium alloys as given in Subclause 3.2 and Annex C. CEN takes no position concerning the evidence, validity and scope of this patent right. The holder of this patent right has assured CEN that he is willing to negotiate
31、 licences under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of this patent right is registered with CEN. Information may be obtained from: Aluminal Oberflchentechnik GmbH b) the requirements for tensile str
32、ength of steel and any requirement for heat treatment before (see 5.4) and/or after (see C.2.2) electrodeposition; c) the significant surface, indicated by drawings of the articles or by suitably marked samples; d) the nature, condition and finish of the substrate, if any of these could affect the s
33、erviceability and/or the appearance of the coating; e) the position on the surface for unavoidable defects, such as rack or contact marks and the limits for acceptable defects on the refined and non-refined product (see 7.2); f) the finish required, for example bright, dull, satin or other finish, p
34、referably with a sample of the finish; g) sampling methods, acceptance levels or any other inspection requirements, if different from those given in ISO 4519 (see Clause 9); h) the standards for any thickness, corrosion or adhesion test requirements (see Clause 8); i) requirements for supplementary
35、treatment if applicable (see 5.5); j) any requirements for a mass fraction of alloy elements greater than 30 % (see 6.2). 4.2 Additional information When applicable, the following additional information shall be supplied by the purchaser: a) any special requirements for, or restrictions on, preparat
36、ion of the articles to be coated; b) any special requirements for recovering rejected articles; c) any special requirements that depend on the shape or method of manufacturing of the component; d) any other special requirements (e.g. roughness and tolerances). 5 Designation 5.1 General The designati
37、on shall comprise the following: a) electrodeposited coating; Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15646:2009BS EN 15646:2009 EN 15646:2009 (E) 9 b) the number of the European Standard to which the required coating shall con
38、form; c) a hyphen; d) the substrate code (see 5.2); e) a solidus; f) the additional applicable codes separated by solidi for every stage of the coating sequence, in the order of application (see 5.3, 5.4 and 5.5). NOTE 1 Examples of codes are given in Table 1 and examples of full designations are gi
39、ven in 5.6. Double separators shall be used to indicate any missing stages (i.e. when a particular stage is not required). NOTE 2 The purchaser should be guided in his choice of designation by the severity of service conditions to be withstood by the coating, expressed as the service condition numbe
40、r (see ISO 27830 1). 5.2 Substrate For the designation of the substrate Table 1 shall apply. Additionally nickel materials shall be identified with the chemical symbol Ni and titanium materials with the chemical symbol Ti. Table 1 Code examples Substrate code (see 5.2) Electrodeposited coating code
41、(see 5.3) Chromate conversion code (see 5.5) Fe Ti Ni PL NM iron or steel titanium nickel plastics non-metallic materials Al Aluminium A C1 E1 colourless yellow iridescent light green NOTE If the standard designation of the metal is to be provided, references to the appropriate literature can be fou
42、nd in Bibliography references 2, 3, 4, 5, 6 and 7. The letters PL shall be used for electroplatable plastics and the letters NM for other non-metallic materials. The intermediate layers shall be designated in accordance with EN 12540 and EN ISO 4527. 5.3 Metallic coatings 5.3.1 General The designati
43、on of electrodeposited aluminium coatings shall be its chemical symbol Al. The designation of aluminium alloy coatings shall be as follows. The metal coating layer is designated by the chemical symbol(s) for the electrodeposited metal, or metals (in the case of an alloy coating), immediately followe
44、d by: a) a number indicating the minimum local thickness of the layer in micrometres (see Clause 6); b) upper case letters indicating the type of coating, if applicable (see below). Licensed CopyChinese University of Hong Kong, 13/06/2009 05:38, Uncontrolled Copy, (c) BSI BS EN 15646:2009BS EN 15646
45、:2009BS EN 15646:2009 EN 15646:2009 (E) 10 When the coating metal is an aluminium alloy, the symbol Al shall be followed by the chemical symbol for each minor component. Each chemical symbol for a minor component shall be followed by a whole number in parentheses designating its nominal percentage b
46、y mass. However, if the percentage mass of a minor component is less than 1 %, then it shall be designated to one decimal place. The decimal sign shall be indicated by a comma on the line. 5.3.2 Intermediate coatings The intermediate layers shall be designated in accordance with EN 12540 or EN ISO 4
47、527, respectively. 5.4 Heat treatment The heat treatment designation shall comprise: a) the letters “HT“; b) in parentheses, the minimum temperature specified, in degrees Celsius; c) the duration, in hours. EXAMPLE A heat treatment to be carried out for 3 h at a minimum temperature of 190 C has the
48、following designation: HT(190)3. 5.5 Supplementary treatment 5.5.1 General The supplementary treatments, if required, shall be conducted immediately after electroplating. 5.5.2 Conversion coatings The application of conversion coatings shall be agreed upon between the contracting parties. Conversion
49、 coatings shall be designated in accordance with EN 12487:2000, Table 1. 5.5.3 Other supplementary treatments Other supplementary treatment shall be agreed upon between the contracting parties. EXAMPLE Other supplementary treatments include the use of a sealant coating on a polymer base (polyester varnish), or the application of a lubricant for reducing the friction values. 5.6 Designation examples The following are examples of designations. EXAMPLE 1 A coating of 12 m aluminium (Al12) on a component of iron (Fe) with a yellow