Brake Rotor Formula Improvement
General Motors built a new type of brake rotor that is supposed to change how rotors perform. Suppliers put a batch of rotors on a lot of Buick and Cadillac models in 2008 to test them out. The experiment was a huge success. They created a new process that changes the chemical make up of components which makes it last longer.
How It’s Done
The corrosion treatment begins by heating the rotors at 560 degrees Celsius for 24 hours in a Nitrogen enriched atmosphere. Nitrogen atoms bond with the steel causing it to harden. The name of this new technology is Ferritic Nitro-Carburizing (FNC). FNC is also used to treat parts used in the powertrain.
What This Means For Consumers and Brake Repair Shops
Since its introduction in 2008, FNC reduced warranty claims on brakes by 70 percent. According to General Motors, more than 80 percent of U.S. vehicles are exposed to one or more environmental corrosion creators, such as acid rain, intense sunlight, snow and ice, and road salt. FNC uses a coating one tenth the thickness of a human hair to eliminate brake shudder caused by rust buildup, and keeps hardware looking cleaner longer. FNC has effectively doubled the average lifespan of brake rotors. Shops should be careful about machining FNC rotors and should consult the TSBs on how to handle FNC rotors.