Contact piece made of tungsten provided with a corrosion-resistant layer made of a base metal
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United States of America Patent
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Mar 4, 2008
Grant Date -
Dec 14, 2006
app pub date -
Apr 19, 2004
filing date -
Apr 22, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A contact piece is formed by a tungsten overlay soldered onto a support, wherein at least portions of the solder layer and optionally of the support are covered by a layer of a less noble metal than tungsten. The corrosion resistance of the tungsten overlay is considerably improved.
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