EN 62321-7-1:2015

Determination of certain substances in electrotechnical products - Part 7-1: Hexavalent chromium - Presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method

IEC 62321-7-1:2015 describes a boiling water extraction procedure intended to provide a qualitative determination of the presence of hexavalent chromium (Cr(VI)) in colourless and coloured corrosion-protection coatings on metallic samples. In this procedure, when Cr(VI) in a sample is detected below the 0,10 g/cm2 LOQ (limit of quantification), the sample is considered to be negative for Cr(VI). Since Cr(VI) may not be uniformly distributed in the coating even within the same sample batch, a "grey zone" between 0,10 g/cm2 and 0,13 g/cm2 has been established as "inconclusive" to reduce inconsistent results due to unavoidable coating variations. In this case, additional testing may be necessary to confirm the presence of Cr(VI). When Cr(VI) is detected above 0,13 g/cm2, the sample is considered to be positive for the presence of Cr(VI) in the coating layer.

Verfahren zur Bestimmung von bestimmten Substanzen in Produkten der Elektrotechnik - Teil 7-1: Bestimmung des Vorliegens von sechswertigem Chrom (Cr(VI)) in farblosen und farbigen Korrosionsschutzüberzügen auf Metallen durch das kolorimetrische Verfahren

Détermination de certaines substances dans les produits électrotechniques - Partie 7-1: Chrome hexavalent - Présence de chrome hexavalent (Cr(VI)) dans les revêtements incolores et colorés de protection anticorrosion appliqués sur les métaux à l'aide de la méthode colorimétrique

L'IEC 62321-7-1:2015 décrit une procédure d'extraction à l'eau bouillante destinée à assurer une détermination qualitative de la présence de chrome hexavalent (Cr(VI)) dans les revêtements incolores et colorés de protection anticorrosion d'échantillons métalliques. Dans la présente procédure, lorsque du chrome hexavalent est détecté sur un échantillon selon une valeur inférieure à 0,10 g/cm2 de la limite de quantification (LOQ), l'échantillon est considéré comme négatif au chrome hexavalent. Dans la mesure où le chrome hexavalent peut ne pas être uniformément réparti sur le revêtement, et ce même au sein du même lot d'échantillons, une "zone grise" comprise entre 0,10 g/cm2 et 0,13 g/cm2 a été établie comme "non concluante" pour réduire l'incohérence des résultats due à des variations inévitables de revêtement. Dans ce cas, des essais supplémentaires peuvent être nécessaires pour confirmer la présence de chrome hexavalent. Si du chrome hexavalent est détecté selon une valeur supérieure à 0,13 g/cm2, l'échantillon est considéré comme positif dans le cadre de la présence de chrome hexavalent dans la couche de revêtement.

Določevanje posameznih substanc v elektrotehniških izdelkih - 7-1. del: Ugotavljanje prisotnosti šestvalentnega kroma (Cr(VI)) v brezbarvnih in obarvanih protikorozijskih premazih na kovinah s kolorimetrično metodo

Ta del standarda IEC 62321 opisuje postopek ekstrakcije z vrelo vodo, namenjen za kvalitativno ugotavljanje prisotnosti šestvalentnega kroma (Cr(VI)) v brezbarvnih in obarvanih protikorozijskih premazih na kovinskih vzorcih.
Koncentracija Cr(VI) v obarvanem protikorozijskem premazu se lahko zaradi izredne reaktivnosti bistveno spremeni, odvisno od časa in pogojev shranjevanja. Ker podatki o pogojih shranjevanja pred predložitvijo vzorca običajno niso znani ali so priloženi vzorcem, ta postopek določa prisotnost Cr(VI) na podlagi zaznanih ravni v premazih v času preskušanja. Pri preskušanju sveže premazanih vzorcev je treba upoštevati čakalno dobo najmanj 5 dni (po nanosu premaza), da se premazi ustrezno stabilizirajo. Ta čakalna doba omogoča, da se pred preskušanjem izvede morebitna poprocesna oksidacija Cr(III) v Cr(VI). Prisotnost Cr(VI) je določena na podlagi mase Cr(VI) glede na površino premaza (μg/cm2). Ta pristop se priporoča, ker je težo protikorozijskega premaza po proizvodnji
težko natančno izmeriti. Z vidika tehnologije premazov je celotna industrija prešla na uporabo kemikalij brez Cr(VI) (s prisotnostjo majhnih količin Cr(VI) ali brez Cr(VI)) ali uporabo običajnih kemikalij na osnovi Cr(VI) (s prisotnostjo večjih količin Cr(VI), ki jih je mogoče zanesljivo zaznati). Na podlagi tega prehoda industrije je prisotnost ali odsotnost Cr(VI) običajno zadosten dejavnik za namene preskušanja skladnosti. Če je zaznana raven Cr(VI) v vzorcu pri tem postopku pod 0,10 μg/cm2 LOQ (meja kvantifikacije), se vzorec obravnava kot negativen za Cr(VI). Ker Cr(VI) v premazu morda ni enakomerno porazdeljen (celo v isti seriji vzorcev), je bilo »sivo območje« z vrednostmi med 0,10 μg/cm2 in 0,13 μg/cm2 označeno kot »nedoločeno«, da se zmanjša število nedoslednih rezultatov zaradi neizogibnih razlik v sestavi premazov. V tem primeru bo morda treba opraviti dodatno preskušanje, da se potrdi prisotnost Cr(VI). Če je zaznana raven Cr(VI) nad 0,13 μg/cm2, se vzorec obravnava kot pozitiven za prisotnost Cr(VI) v sloju premaza.

General Information

• Status: Published
• Publication Date: 17-Dec-2015
• Withdrawal Date: 20-Oct-2018
• ICS: 13.020 - Environmental protection
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: CLC/TC 111X - Environment
• Drafting Committee: IEC/TC 111 - Environmental standardization for electrical and electronic products and systems
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 18-Dec-2015
• Completion Date: 18-Dec-2015
• Ref Project: SIST EN 62321-7-1:2016 - Determination of certain substances in electrotechnical products - Part 7-1: Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method

Relations

• Replaces: EN 62321:2009 - Electrotechnical products - Determination of levels of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2016
'RORþHYDQMHSRVDPH]QLKVXEVWDQFYHOHNWURWHKQLãNLKL]GHONLKGHO
8JRWDYOMDQMHSULVRWQRVWLãHVWYDOHQWQHJDNURPD&U9,YEUH]EDUYQLKLQREDUYDQLK
SURWLNRUR]LMVNLKSUHPD]LKQDNRYLQDKVNRORULPHWULþQRPHWRGR
Determination of certain substances in electrotechnical products - Part 7-1:
Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored
corrosion-protected coatings on metals by the colorimetric method
Ta slovenski standard je istoveten z: EN 62321-7-1:2015
ICS:
29.020 Elektrotehnika na splošno Electrical engineering in
general
31.020 Elektronske komponente na Electronic components in
splošno general
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62321-7-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2015
ICS 13.020; 43.040.10
English Version
Determination of certain substances in electrotechnical products
- Part 7-1: Determination of the presence of hexavalent
chromium (Cr(VI)) in colorless and colored corrosion-protected
coatings on metals by the colorimetric method
(IEC 62321-7-1:2015)
Détermination de certaines substances dans les produits Verfahren zur Bestimmung von bestimmten Substanzen in
électrotechniques - Partie 7-1: Chrome hexavalent - Produkten der Elektrotechnik - Teil 7-1: Bestimmung des
Présence de chrome hexavalent (Cr(VI)) dans les Vorliegens von sechswertigem Chrom (Cr(VI)) in farblosen
revêtements incolores et colorés de protection anticorrosion und farbigen Korrosionsschutzüberzügen auf Metallen
appliqués sur les métaux à l'aide de la méthode durch das kolorimetrische Verfahren
colorimétrique (IEC 62321-7-1:2015)
(IEC 62321-7-1:2015)
This European Standard was approved by CENELEC on 2015-10-21. CENELEC 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 national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62321-7-1:2015 E
European foreword
The text of document 111/380/FDIS, future edition 1 of IEC 62321-7-1, prepared by
IEC/TC 111 "Environmental standardization for electrical and electronic products and systems" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62321-7-1:2015.

The following dates are fixed:
(dop) 2016-07-21
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-10-21
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62321-7-1.2015 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
ISO 3613 NOTE Harmonized as EN ISO 3613.
ISO 648 NOTE Harmonized as EN ISO 648.
DIN EN 15205:2007 NOTE Harmonized as EN 15205:2006.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 62321-1 -  Determination of certain substances in EN 62321-1 -
electrotechnical products -- Part 1:
Introduction and overview
IEC 62321-2 -  Determination of certain substances in EN 62321-2 -
electrotechnical products -- Part 2:
Disassembly, disjunction and mechanical
sample preparation
ISO 78-2 -  Chemistry_- Layouts for standards_- - -
Part_2: Methods of chemical analysis
ISO 3696 -  Water for analytical laboratory use - EN ISO 3696 -
Specification and test methods

IEC 62321-7-1 ®
Edition 1.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Determination of certain substances in electrotechnical products –

Part 7-1: Hexavalent chromium – Presence of hexavalent chromium (Cr(VI)) in

colourless and coloured corrosion-protected coatings on metals by the

colorimetric method
Détermination de certaines substances dans les produits électrotechniques –

Partie 7-1: Chrome hexavalent – Présence de chrome hexavalent (Cr(VI)) dans

les revêtements incolores et colorés de protection anticorrosion appliqués sur

les métaux à l'aide de la méthode colorimétrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.020; 43.040.10 ISBN 978-2-8322-2895-1

– 2 – IEC 62321-7-1:2015 © IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 7
4 Reagents . 7
4.1 General . 7
4.2 Reagents . 7
5 Apparatus . 7
5.1 General . 7
5.2 Apparatus . 7
6 Sampling . 8
7 Boiling water extraction procedure . 8
8 Calibration . 11
8.1 Permanent calibration instruments . 11
8.2 Traditional calibration instruments . 11
9 Calculation . 11
10 Precision . 12
11 Quality assurance and control . 12
11.1 Colorimetric instrument performance verification . 12
11.2 Limits of detection (LOD) and limits of quantification (LOQ) . 12
12 Test report . 13
Annex A (informative) International inter-laboratory study on corrosion-protected
coatings – Data overview . 16
Bibliography . 18

Figure 1 – Screw body and screw head measurements . 9
Figure A.1 – Concentration of chromium VI based on surface area for all samples . 16
Figure A.2 – Concentration of chromium VI based on surface area – Expanded view
2 2
between 0 µg/cm to 1 µg/cm . 17

Table 1 – Comparison to standard solution and interpretation of results . 11
Table 2 – Student’s t values used for calculation of method detection limit (LOD or
MDL = t-statistic × standard deviation (sn-1)) . 13
Table 3 – Reporting table . 14
Table 4 – Example of a completed reporting table . 15

IEC 62321-7-1:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DETERMINATION OF CERTAIN SUBSTANCES
IN ELECTROTECHNICAL PRODUCTS –

Part 7-1: Hexavalent chromium – Presence of hexavalent chromium (Cr(VI))
in colourless and coloured corrosion-protected coatings
on metals by the colorimetric method

FOREWORD
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