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DIN EN ISO 14647:2016 Edition

DIN EN ISO 14647:2016 Edition

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Metallic coatings – Determination of porosity in gold coatings on metal substrates – Nitric acid vapour test

Published By Publication Date Number of Pages
DIN 2016-11 15
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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 inlays or claddings containing 75 % or more of gold, for electrodeposits 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 than 0,6 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.

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DIN EN ISO 14647
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