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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English - French

Published date

09-16-2015

Publisher

International Electrotechnical Committee

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.
It has the status of a horizontal standard in accordance with IEC Guide 108.

DocumentType	Standard
ISBN	978-2-8322-2895-1
Pages	37
PublisherName	International Electrotechnical Committee
Status	Current

Standards	Relationship
DIN EN 62321-7-1 : 2016	Identical
I.S. EN 62321-7-1:2015	Identical
EN 62321-7-1:2015	Identical
SN EN 62321-7-1:2015	Identical
BS EN 62321-7-1:2015	Identical
UNE-EN 62321-7-1:2015	Identical