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<p>This International Standard specifies equipment and a method for using nitric acid vapour to determine porosity in</p>
<p>gold coatings, particularly electrodeposits and clad metals used on electrical contacts.</p>
<p>This method is designed to show whether the porosity level is less than or greater than some value that, by</p>
<p>experience, is considered by the user to be acceptable for the intended application.</p>
<p>It is suitable for inlays or claddings containing 75 % or more of gold, for electrodeposits containing 95 % or more of</p>
<p>gold or for substrates of copper, nickel and their alloys that are commonly used in electrical contacts.</p>
<p>The nitric acid vapour test is too severe to be used for gold coatings less than 0,6 _m thick. It is also not suitable for</p>
<p>coatings that are less noble than gold or platinum, such as palladium and its alloys, or gold-flashed palladium and</p>
<p>its alloys.</p>
<p>Several other porosity testing methods are described in ISO 10308 and in the literature (see e.g. Bibliography, [1]</p>
<p>and [2]).</p>
Reģistrācijas numurs (WIID)
25057
Darbības sfēra
<p>This International Standard specifies equipment and a method for using nitric acid vapour to determine porosity in</p>
<p>gold coatings, particularly electrodeposits and clad metals used on electrical contacts.</p>
<p>This method is designed to show whether the porosity level is less than or greater than some value that, by</p>
<p>experience, is considered by the user to be acceptable for the intended application.</p>
<p>It is suitable for inlays or claddings containing 75 % or more of gold, for electrodeposits containing 95 % or more of</p>
<p>gold or for substrates of copper, nickel and their alloys that are commonly used in electrical contacts.</p>
<p>The nitric acid vapour test is too severe to be used for gold coatings less than 0,6 _m thick. It is also not suitable for</p>
<p>coatings that are less noble than gold or platinum, such as palladium and its alloys, or gold-flashed palladium and</p>
<p>its alloys.</p>
<p>Several other porosity testing methods are described in ISO 10308 and in the literature (see e.g. Bibliography, [1]</p>
<p>and [2]).</p>
