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  • BSI
    BS EN ISO 14647:2016 Metallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test
    Edition: 2016
    $316.70
    / user per year

Description of BS EN ISO 14647:2016 2016

This International Standard specifies equipment and a method for using nitric acid vapour to determine porosity in gold coatings, particularly electrodeposits and clad metals used on electrical contacts.

This method is designed to show whether the porosity level is less than or greater than some value that, by experience, is considered by the user to be acceptable for the intended application.

It is suitable for in lays or claddings containing 75% or more of gold, for electro deposits containing 95% or more of gold or for substrates of copper, nickel and their alloys that are commonly used in electrical contacts.

The nitric acid vapour test is too severe to be used for gold coatings less than0,6 µm thick. It is also not suitable for coatings that are less noble than gold or platinum, such as palladium and its alloys, or gold-flashed palladium and its alloys.

Several other porosity testing methods are described in ISO 10308 and in the literature (see e.g. Bibliography,[1] and [2]).



The nitric acid test is not suitable for gold coatings less than 0,6 micrometres thick, for coatings less noble than gold or platinum, or for gold-flashed palladium and its alloys

Standard NumberBS EN ISO 14647:2016
TitleMetallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test
StatusDefinitive
Publication Date2016-05-31
Identical National Standard OfEN ISO 14647:2016, ISO 14647:2000
CorrectsBS ISO 14647:2000
DescriptorsElectrodeposition, Gold, Coatings, Porosity measurement, Test equipment, Decorative coatings, Nitric acid, Porosity, Thickness, Chemical analysis and testing, Metal coatings
ICS25.220.40 Metallic coatings
CommitteeSTI/33
ISBN978 0 580 90539 1
PublisherBSI
Pages18

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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