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Why is platinum used in electrical contacts and sparking points?
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platinum group
Rhodium foil and wire.
Platinum is used for electrical contacts and sparking points primarily because it possesses exceptional resistance to both high temperatures and the chemical attack caused by electric arcs.1
Because platinum has a high melting point and remains stable even when exposed to intense heat, it is well-suited for components that must endure the harsh conditions of electrical sparking. Its inherent resistance to corrosion and chemical degradation ensures that these contacts maintain their integrity and performance over time.21