BS EN 15205-2006 Determination of hexavalent chromium in corrosion protection layers - Qualitative analysis《测定防腐涂层六价铬元素 质量分析》.pdf

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

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