1、BRITISH STANDARDBS EN 12206-1:2004Paints and varnishes Coating of aluminium and aluminium alloys for architectural purposes Part 1: Coatings prepared from coating powderThe European Standard EN 12206-1:2004 has the status of a British StandardICS 87.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g
2、56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12206-1:2004Incorporating corrigendum February 2017BS EN 12206-1:2004ISBN 978 0 580 97276 8Amendments/corrigenda issued since publicationDate
3、 Comments28 February 2017 Supersession details added in national forewordThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 July 2004 The British Standards Institution 2017. Published by BSI Standards Limited 2017National forewordThis British
4、 Standard is the UK implementation of EN 12206-1:2004. It supersedes BS 6496:1984 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/21, Paint systems and surface preparation for metallic substrates.A list of organizations represented on this committe
5、e can be obtained on request to its secretary.This publication 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.EUROPEAN STANDARDNORME EUROPENNEEU
6、ROPISCHE NORMEN 12206-1July 2004ICS 87.040English versionPaints and varnishes - Coating of aluminium and aluminiumalloys for architectural purposes - Part 1: Coatings preparedfrom coating powderPeintures et vernis - Revtements de laluminium et desalliages daluminium pour applications architecturales
7、 -Partie 1: Revtements partir de peintures en poudreBeschichtungsstoffe - Beschichtungen auf Aluminium undAluminiumlegierungen fr Bauzwecke - Teil 1:Beschichtungen aus BeschichtungspulvernThis European Standard was approved by CEN on 27 December 2001.CEN members are bound to comply with the CEN/CENE
8、LEC Internal Regulations which stipulate the conditions for 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
9、 member.This European Standard exists in three official versions (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 member
10、s are the national standards bodies of 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
11、Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12206-1:2004: EEN 1
12、2206-1:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Requirements.6 5 Test methods11 Annex A (normative) Methods for the determination of the mass per unit area of conversion layers and for the identification of chromium, phosphoru
13、s and zinc.15 Annex B (normative) Requirements for alternative pretreatment18 Annex C (normative) Measurement of film thickness .19 Annex D (normative) Falling weight test apparatus 21 Annex E (informative) Sequence of pretreatment stages .22 Annex F (normative) Enhanced durability coating powders 2
14、4 Bibliography 25 BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12206-1:2004 (E) 3 Foreword This document (EN 12206-1:2004) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national st
15、andard, either by publication of an identical text or by endorsement, at the latest by December 2004, and conflicting national standards shall be withdrawn at the latest by December 2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countri
16、es 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, Slovakia, Slovenia, Spain, Sweden, Switzerlan
17、d and United Kingdom. Annexes A, B, C, D and F are normative, annex E is for information only. BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12206-1:2004 (E) 4 Introduction This is the first Part of EN 12206. The present intention is to develop another Part dealing with the organic coating of aluminium an
18、d aluminium alloy extrusions, sheet and preformed sections for architectural purposes, prepared from liquid coating materials. BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12206-1:2004 (E) 5 1 Scope This Part of EN 12206 specifies requirements and the corresponding methods of test relating to the organic
19、 coating of aluminium and aluminium alloy extrusions, sheet and preformed sections for architectural purposes, using coating powders. It also describes: a) the pretreatment of the substrate prior to the coating process; b) the coating powder; c) the coating process; d) the final product. Each item i
20、s dealt with separately in this Part of EN 12206 so that any interested party can ensure compliance appropriate to its area of responsibility. CAUTION The procedures described in this standard are intended to be carried out by suitably trained and/or supervised personnel. The substances and procedur
21、es used in this method may be injurious to health if adequate precautions are not taken. Attention is drawn in the text to specific hazards. This standard refers only to technical suitability and does not absolve the user from statutory obligations relating to health and safety. 2 Normative referenc
22、es This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these
23、 publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 573-3, Aluminium and aluminium alloys Chemical composition and form of wrought products Par
24、t 3: Chemical composition. EN ISO 1519, Paints and varnishes Bend test (cylindrical mandrel) (ISO 1519:2002). EN ISO 1520, Paints and varnishes Cupping test (ISO 1520:1999). EN ISO 2409, Paints and varnishes Cross-cut test (ISO 2409:1992). EN ISO 2813, Paints and varnishes Determination of specular
25、gloss of non-metallic paint films at 20, 60 and 85 (ISO 2813:1994, including Technical Corrigendum 1:1997). EN ISO 3231, Paints and varnishes Determination of resistance to humid atmospheres containing sulfur dioxide (ISO 3231:1993). EN ISO 3668, Paints and varnishes Visual comparison of the colour
26、of paints (ISO 3668:1998). EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987). EN ISO 6270-1, Paints and varnishes Determination of resistance to humidity Part 1: Continuous condensation (ISO 6270-1:1998). EN ISO 8130-9, Coating powders Part 9: Sampling (
27、ISO 8130-9:1992). EN ISO 8565, Metals and alloys Atmospheric corrosion testing General requirements for field tests (ISO 8565:1992). BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12206-1:2004 (E) 6 EN ISO 11341:1997, Paints and varnishes Artificial weathering and exposure to artificial radiation Exposure
28、to filtered xenon-arc radiation (ISO 11341:1994). ISO 2810, Paints and varnishes Notes for guidance on the conduct of natural weathering tests. ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection. I
29、SO 2859-2, Sampling procedure for inspection by attributes Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection. ISO 7724-3, Paints and varnishes Colorimetry Part 3: Calculation of colour differences. ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests
30、. 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 powder coating a continuous layer of a coating powder which has been applied to the aluminium or aluminium alloy substrate and which is protective or decorative, or both 3.2 conversio
31、n layer a layer produced on an aluminium surface by chemical pretreatment with or without the use of an applied electric current 3.3 finish the surface of the coated article which determines its appearance 3.4 coating powder a solvent-free coating material in powder form which, after fusing and poss
32、ible curing, gives a continuous film EN 971-1:1996 3.5 significant surface that area of the article on which the coating is essential for serviceability and/or appearance 3.6 specifier the person specifying the performance requirements for the coating and significant surfaces of the article 3.7 test
33、 specimen a single sample of the final product to be used for testing 4 Requirements 4.1 Material (substrate) Aluminium and aluminium alloys are classified in accordance with EN 573-3. Suitable materials are those listed as series 1000, 3000, 5000 and 6000. BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12
34、206-1:2004 (E) 7 4.2 Pretreatment of the substrate 4.2.1 General Before application of the coating powder, a pretreatment layer shall be applied. This pretreatment may be either a) chemical treatment with aqueous solutions containing either chromate ions or chromate and phosphate ions, without apply
35、ing an electric current, or b) an alternative pretreatment (for instance chromium-free systems, “no-rinse-dry-in-place pretreatment“ or electrolytic conversion, or other processes). After the conversion process, the substrate is normally rinsed with deionized water, and dried. 4.2.2 Conventional pre
36、treatment 4.2.2.1 General The aluminium or aluminium alloy shall be free from corrosion prior to pretreatment. Any item previously coated or anodized shall be stripped down to the aluminium substrate prior to the pretreatment. The sequence of the pretreatment stages is shown in annex E. The pretreat
37、ment stages shall take place one after the other with the minimum delay in between to ensure that the surface to be pretreated does not become dry between succesive stages. The pretreatment solutions shall be applied either: a) by dipping in baths of sufficient size to allow efficient operation of t
38、he chemical process on all significant surfaces ; or b) by spraying, in tanks or cabinets made so that all significant surfaces are in contact with the spraying solution for the specified period of time. The solution used for the conversion process is normally used for aluminium and aluminium alloys
39、 only. Pretreatment of other metals is not authorized unless removal of metallic-ion contamination is ensured. 4.2.2.2 Cleaning, pickling and rinsing All surface contaminants such as oils, greases, lubricants and other residues shall be removed using alkaline or acidic solutions and/or organic solve
40、nts in appropriate combinations. Before the conversion stage, the substrate shall be thoroughly cleaned and/or pickled. After cleaning and/or pickling, the substrate may be rinsed (see annex E). NOTE It is advisable that the rinse water prior to the conversion stage should comply to the following re
41、quirements : electrical conductivity : max. 1 000 S/cm ; chloride content : less than 100 mg/l ; sulfate content : less than 50 mg/l ; phosphate content : less than 5 mg/l (for chromate conversion only). 4.2.2.3 Conversion and drying of chromate and phosphochromate layers A conversion layer is produ
42、ced by application of the appropriate solution. BS EN 12206-1:2004EN 12206-1:2004 (E)EN 12206-1:2004 (E) 8 Chromate conversion layers vary in colour from an iridescent yellow to a golden tan. The layers are characterized by the presence of chromium and the absence of phosphate (see annex A). The mas
43、s per unit surface area of the conversion layer, often referred to as “conversion coating weight“, as measured in accordance with the method described in annex A, shall be between 0,4 g/m2and 1 g/m2. Phosphochromate conversion layers vary in colour from iridescent to various shades of green. The lay
44、ers are characterized by the presence of both chromate and phosphate (see annex A). The mass per unit surface area of the conversion layer, as measured in accordance with the method described in annex A, shall be between 0,4 g/m2and 1,2 g/m2. NOTE The colours given above are only indicative. They de
45、pend on alloys used and pretreatment and do not characterize the quality of the conversion layer. The conversion layer can be rinsed with water and shall finally be rinsed with deionized water. The electrical conductivity of the water draining off from significant surfaces at the final rinse shall b
46、e below 30 S/cm at 20 C. If the final rinse is carried out with hot water, the temperature shall not exceed 60 C and the rinsing time shall be as short as possible in order to avoid dissolving of hexavalent chromium from the conversion layer. The layer shall be as uniform as possible, adhering to th
47、e substrate and free from any powdering. The drying temperature after pretreatment, as measured on the metal surface, shall not exceed 100 C if the coating powder is applied without delay or interruption after pretreatment. If it is applied with delay or interruption after pretreatment (less than 16
48、 h but not more), the maximum temperature on the metal surface shall be as follows: 65 C for chromate layers; 85 C for phosphochromate layers. The coating powder shall not be applied more than 16 h after pretreatment. 4.2.3 Alternative pretreatments Alternative pretreatments, e.g. chromium-free syst
49、ems, “no-rinse-dry-in-place pretreatment“ or electrolytic conversion or other processes may be specified but shall comply with the requirements of annex B. 4.3 Coating powder 4.3.1 General The tests shall be carried out in accordance with clause 5. The panels shall be prepared in accordance with 5.1. NOTE A coating powder that has been found to be of suitable quality to pass the requirements of this Part of EN 12206 may then be used to confirm the suitability of other pretreatment processes. 4.3.1.1 Coatin
