STD BSI BS EN 12373 4 ENGL 1999 Lb24bb9 0781718 O73 = BRITISH STANDARD Aluminium and aluminium alloys Anodizing Part 4 Estimation of loss of absorptive power of anodic oxidation coatings after sealing[.]
S T D - B S I BS EN 12373-4-ENGL 1999 L b b b 0781718 O73 BRITISH STANDARD Aluminium and aluminium alloys Anodizing Part 4: Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test with prior acid treatment The European Standard EN 1237341998has the status of a British Standard ICs 25.220.20,77.120.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT As PERMITTED BY COPYRIGHT LAW = BS EN 1237341999 BS EN 1237341999 National foreword This British Standard is the English language version of EN 1237341998 It s~persedesBS 6161-51982, which is withdrawn The UK participation in its preparation was entrusted to Technicai Committee STi/32,Anodic oxidation coatings on aluniinium,which has the responsibility to: - aid enquirers to understand the tea - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests inform@ - monitor related international and European developments and promulgate them in the UK 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 publications referred to in this document may be found in the BSI Standards Catalogue under the section entithi “IntemationaiStandards Correspondence Index”,or by ushg the “Find” facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application `,,,```,````,,`,,`,,,```,,,,`-`-`,,`,,`,`,,` - Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, the EN titie page, pages to and a back cover i This British Standard,having been prepared under the diredion of the Sector Committee for Materialsand Chemicals, was published under the authority of the Standards Committee and comes into effect on 15Aprii 1999 ISBN O 680 32030 Amendments issued since publication Amd No Date Text affected S T D - B S I B S EN 32373-q-ENGL EUROPEAN m 3999 m 3b24bb9 0783720 w EN 123734 NORME EUROPÉENNE EUROPm€E NORM November 1998 ICs 25.220.20; 77.120.10 Descriptois: surface treatment, anodizing, aluminium, aluminium alloys, sealing, absorption factor, chemical tests, dyes English version Aluminium and aluminiwn alloys -AnPart Esthution of loss of absorptive power of anodic oxidation coatings after sealmg by dye spot test with prior acid tmdment Aluminium et ailiages d'aiuminium Anodidon -Partie Appréciation de la perte du pouvoir absorbant des couches d'owdes anodiques par essai a la goutte de colorant avec action acide préalable Aluminium und Aluminiumlegierungen Anodisienm - TU4 Abs&&mg der Anfärbbarkeit von modisch emugten oladschichten nach dem Verdichten durch Farbtropfentest mit vorheriger Shrebehanàlung This European Standard was approved by CEN on November 1998 CEN members are bound to comply with the CENKENELEC Internai Regulations which stipuiak the conditions for giving this European Standard the status of a national standard without any alteration UptoCiate lists and bibliographicai references concerning such national standards may be obtained on application to the Centrai Secretariat or to any CEN member This European Standard exists in three officialversions (Engüsh, French, German) A version in any other language made by transialion under the responsibility of a CEN member into its own language and notified to the Centrai Secretariat has the same status as the official versions , Czech CEN members are the national standards bodies of A ~ ~ t r i aBelgium, Republic, Denmark, Fuiland, France, Germany, Greece, Iceland, Ireland, Itaiy, Luxembourg, Netherlands, Norway, Portugai, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comitk Européen de Nonnalisation Europäisches Komitee fûr Normung Central Secretariat: rue de Stassart 36, B-1050Brussels - O 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 1237341998 E STD-BSI BS EN 32373-9-ENGL 3999 Lbi2qbbS bb8 Page EN 1237341998 Foreword This European Standard has been prepared by Techniai Committee CENR% 132, Aluminium and aluminium aiioys, the Secretariat of which is held by AFNOR 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 1999, and conflicting national standards shall be withdram at the latest by May 1999 According to the CENKENELEC Internal Regulations, the national standards organizations of the foliowing countries are bound to implement this European Standank Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Icehd, Irehd, My, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom It is based upon IS0 2143A981 in this standard, annexA is normative EN 12373,Aluminium and aluminium alloys Anodizing, comprises the following parts: -Part 1: Methal for spea&ìng decomtive and protective anodic oxidation coatings on aluminium; -Part 2:Detaminution of mass per unit area ( m @ ìdensity] of anodic oxidation coatings- -Part 9: M e m m t of wear resistance and wear index of anodic oxìùat.iOn coatings using an abrasive wheel wear test appamtus; -Part 10: Measurement of w a n spec@ïc alwasion resistance of anodic oxidation coatings usàng an abmsive jet test appamtus; -Part 11: Measurement of specular m$!echm and sp&r gloss of anodic oxidation coatings at a n g k of2@, 45”,6@ ~ s “ ; -Part 12: M e a s u m t of mmtance chumteristics of aluminium s u @ ìusàng integmting-sphere instmLmats; -Part 13: M e a s u m t of wfictivity chamteristics of aluminium su@mesusing a gonùyphotometer or an abridged gmùyphtometer; -Part 14: V W determination of image clamtg of anodic oxidatùm coatings - chart scale method; -Part 15: Assessrnent of resistance of anodic oxidation coatings to cmcking by e f m t i o n ; -Part 16: Checkfor continuity of thin anodic oxidation coatings - Copper su&ate test; -Part 1E Determinution of eìecwic tmxkùmm potential; -Part 18: Rating sgstem for the a>alwl>tionof pitting corrosion- chart method; -Part 19: Rating system for the evaluation of pittiw m s ù m - Gmd method Gravimet!rìcmethod; -Part 3: Determination of thof anodic oxidation coatings -NmdescruCtive measurement by splihbeam micmsqe; -Part 4: Estimation of loss of absvrptiw power of Contents anodic oxidation coatings qfkrseaJing by dye spot test with pìm acid macment; -Part 5: Assessment of quality of sealed anodic Foreword oxidation coatings by mecisurement of admittance; Introduction -Part 6: Assessment of quality of sealed anodic Scope oxidation coatings by m e a s u m t of the loss of mass clfterimmersion in phosphoric acid/chmmic Principle acid solutùrn without prior acid mat?nent; Reagents -Part E Assessment of quality of sealed anodic Testspecimens oxidation coatings by measurement of the loss of mass a m immersion in p h s p h d c W c h m m i c procedure acid solution with pìm acid treatment; Expression of results -Part 8: Determination of the m p a m t i v e Testreport fastness to ultra-zvidet light and heat of coloured Annex A (normative) interpretation of the anodic oxidation coatings; results of the dye spot test page 3 3 3 O BSI 04-1999 S T D - B S I BS EN 12373-'4-ENGL 1777 m LbZLibbS 0781722 STq m Page EN 1237341998 Introduction `,,,```,````,,`,,`,,,```,,,,`-`-`,,`,,`,`,,` - The resistance of anodic oxidation coatings to the absorption of dyes can give information on the quality of sealing, total resistance indicating that the quality of sealing is good Slight loss of resistance to absorption, however, does not necessarily mean that the sealing of the coating is poor; it may be a consequence of certain agents having been added to the seaiing bath In cases of doubt, the quality of sealing can be established using a reference method such as that described in EN 12373-6l) or EN 123737l) scope This part of this European standard specifies a method of athating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment The method is suitable for use as a production control method and is applicable to anodic oxidation coatings which may be subjected to weathering or aggresive environments, or where resistance to sỵaining is important The method is not applicable to coatings that a) are formed on alloys containing more than % copper or % silicon; b) are sealed by the dichromate process; c) have been given supplementary processing; for example, oiling, waxing or lacquering; d) are coloured in deep shades; e) are less than cl.m thick The method is less appropriate where nickel or cobalt salts, or organic ầdiüves,have been added to the seing bath 网 享 w Principle A degreased area of sample is subjected to the action of an acid and the coloration obtained after the subsequent application of a dyestuff is observed Reagents 3.1 General Use only reagents of recognized analyticai grade and distilled water, or water of equivaìent purity The acid solutions specified in 3.2.1 and 3.2.2 may be used e q m y for either dye spot test, but the acid solution specified in 3.2.2 is preferred for safety reasons 3.2 Acid solutions WARNING NOTE These acid solutions contain hydrofluoric acid, and should be stored in appropriate containers and handled with care o BSI 04-1999 3.2.2 Acid solution B Solution containing 25 mi of fluorosilicic acid ( H s i ) Cp20 = 1,29 g h l ) per litre 3.3 Dye solutions 3.3.1 Dye solution A Aqueous solution containing g of Sanodai Blue 2LW (Colour Index Mordant Blue 69) per iitre, at$usted, at approximately 23 O C , to a pH of 5,O 0,5 with dilute sulfuric acid solution or with dilute sodium hydroxide solution 3.3.2 Dye solution B Aqueous solution containing 10 g of Sanodai Red EBLW (Colour Index Acid Red 331) per litre, adjusted, at approximately 23 O C , to a pH of 5,7 0,5 with dilute sulfuric acid solution or with dilute sodium hydroxide solution * * m o c w x zf Test specimens The test shall nomially be carried out using production articles b ww 分 准 标 See foreword 3.2.1 Acid solution A Solution containing 25 mi of sulfuric acid Cp20 = 1,84gíml) and 10 g of potassium fluoride per litre NOTE The use of specially prepared test specimens, processed at the same time and in the same manner as production articles, can lead to emneous resuits Procedure Clean the surface to be tested,removing any grease with a piece of cotton wool soaked in, e.g., acetone or ethanol 96 % (VIV) Apply one drop of acid solutionA (3.2.1) or acid solution B (3.2.2), at approximately 23 OC, to the horizontal, clean, dry surface, and ailow to remain for 60 s Remove the drop of acid solution, and wash and dry the test surface Apply one drop of dye solutionA (3.3.1) or dye solution B (3.3.2) to the spot treated previously with acid solution, and ailow to remain for Wash off the drop of dye and clean the surface of the test area thoroughly by rubbing with a clean cloth soaked in water and a light abrasive, such as magnesia, whiting or an equivalent abrasive, for 20 s Rinse thoroughly and Examine the test area and assess the intensity of the stain by comparison with the examples illustrated in annex A m Expression of results Express the loss of absorptive power in accordance with the classification given in annex A or as the intensity of the stain,as a numerical value, in accordance with annex A STD-BSI BS EN L2373-4-ENGL 1777 Lb2gbb9 0783723 930 = Page EN 1237341998 l k s t report "he test report shall include at least the following infomation: a) the type and identifídon of the specimen ~ỈS@ b) a reference to this European standard; c) the anodizing specification (where horn); d) the acid treatment used in the test (3.2.1 or 3.2.2); e) the coìour of the dye solution used in the test (3.3.1 or 3.3.2); f) the loss of absorptive power, or the intensity of the stain as a numerical value (see clause 6); NOTE Acceptance levels are normally specified in the relevant product specification g) any observations concerning the conduct of the test or the nature of the stained area (for example, uneven density of staining); h) the date of the test w x zf b w w w `,,,```,````,,`,,`,,,```,,,,`-`-`,,`,,`,`,,` - 网 享 m o c 分 准 标 o BSI 04-1999 Page EN 1237341998 Annex A (normative) Interpretation of the results of the dye spot test m o c w x zf 网 享 分 准 标 O BSI 04-1999 w b ww `,,,```,````,,`,,`,,,```,,,,`-`-`,,`,,`,`,,` - BS EN 1237341999 BSI - British Standards Institution BSI is the independent nationalbody responsible for preparing British Standards It presents the UK view on standarcis in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be gratefui if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identi@of which can be found on the inside front cover Tel: 0181 996 9OOO Fax: 0181 996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards m o c Orders for ail BSI, international and foreign standards publications should be addressed to Customer Services Tel: 0181 996 7000 Fax: 0181 996 7001 w x f z b in response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British standards, unlm otherwise requested Information on standards BSI provides a wide range of information on Wonal, European and internationai standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on ail its products and services Contact the I n f o d o n Centre Tel:0181 996 7111 Fax:0181 996 7048 Subscribing members of BSI are kept up to date with standards developments and receive substantiaì discounts on the purchase price of standards.For details of these and other benefits contact Membership A'on Tek 0181 996 7002 网 享 w ww 分 准 标 Fax: 0181 996 7001 Copyright copyright subsists in ail BSI publications BSI also holds the copyright, in the UK,of the publications of the intemationai standankation bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI I'his does not preclude the free use, in the course of implementing the standard,of necessary details such as symbols, and size,type or grade designations If these Jetails are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained [f permission is granted, the terms may include royalty payments or a licensing m e n L Details and advice can be obtained from the Copyright Manager ïek 0181 996 7070 BSI 389 C k h c k High Roa London w4 4AL 9903- 0.3k - RTL I SANODAL RED B3LW ALUMINIUM BLUE LW BLEU ALUMINIUM 2L w I B3LW Intensity of the stain Loss of absorptive power Intensité de la tache Perte du pouvoir absorbant `,,,```,````,,`,,`,,,```,,,,`-`-`,,`,,`,`,,` - I I I I totale