|
The MAJOR benefits of platinum and iridium are:
a) their resistance to ionic disintigration (electrons destructively stripping metal atoms during each "arc" firing), and...
b) their much higher MELTING temperatures.
...as compared to older nickel-iron and copper core plugs. Copper-core plugs actually DO have better electrical conductivity, but they also have much lower melting temperatures and greater ionic stripping (electrode erosion).
|