Why are Precious Metals Used in Spark Plugs?!

Precious metals like platinum, iridium, and palladium boast exceptionally high melting points and superior electrical conductivity compared to conventional materials. This makes them ideal candidates for the electrode tips of spark plugs. When subjected to the extreme heat and electrical currents within the combustion chamber, these metals resist deformation and erosion, ensuring consistent performance over an extended lifespan.
Spark plugs also endure harsh conditions within the engine, including exposure to corrosive gases and intense heat. Precious metals exhibit remarkable resistance to corrosion and oxidation, preventing degradation of the electrode surfaces. This resistance translates to enhanced durability, reducing the frequency of spark plug replacement and maintenance costs for vehicle owners.

#sparkplug #platinum #recycling

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Given the scarcity and cost of aridium and platinum, are there any emerging alternatives that could potentially match their performance in spark plugs?