aluminum vs. steel in brake disc
i am involved with a racing program in which we currently use a hard-coat annodizing on aluminum rotors. this annodizing greatly reduces wear and allows us to use these rotors for 3-4 races before changing. we run a soft compound pad which must be changed after each race. previously we've used a ceramic coating which performed even better in terms of wear and braking force, but this coating is expensive and for our application the added cost outweighed the benefits.