GSO ISO 14647:2013
金属镀层 金属基体镀金孔隙率的测定 硝酸蒸发试验

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

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标准号

GSO ISO 14647:2013

发布

2013年

发布单位

GSO

当前最新

GSO ISO 14647:2013

 

 

适用范围

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

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