1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58layers Qualitative analysisThe European Standard EN 15205:2006 has the status of a British Standard
2、ICS 77.060Determination of hexavalent chromium in corrosion protection BRITISH STANDARDBS EN 15205:2006BS EN 15205:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49888 3Amendments issued since publicat
3、ionAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of EN 15205:2006.The UK participation in its
4、preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented on STI/33 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEURO
5、PISCHE NORMEN 15205November 2006ICS 77.060English VersionDetermination of hexavalent chromium in corrosion protectionlayers - Qualitative analysisDtermination du chrome hexavalent dans les revtementsanti-corrosion - Analyse qualitativeBestimmung von sechswertigem Chrom inKorrosionsschutzschichten -
6、Qualitative BestimmungThis 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 lists and
7、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 responsibility
8、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, Italy, La
9、tvia, 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-1050 Brussel
10、s 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15205:2006: EEN 15205:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Principle4 3 Apparatus .4 4 Reagents.4 5 Procedure .5 6 Expression of test results.5 7 Test report 6 EN 15205
11、:2006 (E) 3 Foreword This document (EN 15205:2006) 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
12、 or by endorsement, at the latest by May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, B
13、elgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15205:2006 (E) 4 1 Scope T
14、his European Standard describes a testing method for the qualitative analysis of hexavalent chromium in corrosion protection layers. WARNING Use of this standard may involve the handling of hazardous materials, operations and equipment. This standard does not purport to address all the safety proble
15、ms associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2 Principle The coated part to be examined (test sheet metal, construction unit) is extracted
16、 and the Cr(VI) content in the extracted solution is determined according to the colour reaction with 1,5-Diphenylcarbazide. Cr(VI) oxidizes 1,5-Diphenylcarbazide to 1,5-Diphenylcarbazone, which forms a red-violet coloured complex with the developed Cr(III). Evaluation is performed by visual inspect
17、ion of the coloured solution or by using a spectrophotometer. 3 Apparatus Normal laboratory apparatus and the following: NOTE Clean all glassware thoroughly. It is recommended that cleaning is done by boiling the glassware with 5 M HNO3and then it rinsing thoroughly with deionised water (4.1). 3.1 S
18、pectral or filter photometer. With a spectral photometer, the wavelength is set at 540 nm. With a filter photometer, use a filter with a middle transparency at approximately 540 nm. 3.2 Cuvettes, with a path length of 1 cm or 5 cm. 3.3 Analytical balance, capable of weighing to the nearest 0,1 mg. 4
19、 Reagents 4.1 Deionised water, having a pH value 4 to 7 and conductivity 0,1 g/cm2Sample contains Cr(VI) EN 15205:2006 (E) 6 If a clear visual estimation is not possible with the comparison solution, or if before making the indicator addition a disturbing self-colouring of the solution occurs, carry
20、 out a photometric measurement at a wavelength of 540 nm against the comparison solution. 7 Test report The test report shall contain as a minimum the following information: a) all information necessary for identification of the sample tested; b) reference to this European Standard (EN 15205); c) re
21、sults of the test, including the results of the individual determinations and their mean as described in clause 6; d) any deviations from the procedure specified; e) any unusual features (anomalies) observed during the test; f) date of the test or the date of test report. blankBS EN BSI389 Chiswick
22、High RoadLondonW4 4AL15205:2006BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated
23、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 grateful if anyone finding an inaccuracy or ambiguity while using this British Stan
24、dard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive
25、the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-.I
26、n response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international standards th
27、rough its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribing members o
28、f BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information regarding onlin
29、e access to British Standards via British Standards Online can be found at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international sta
30、ndardization 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.This does not pr
31、eclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.
