Could someone please explain what is thermal oxidation of the carbon brakes?
Catalytic oxidation of carbon occurs when a catalyst, such as an
  alkali metal(s), is present. When a catalyst is present, the
  temperature at which thermal oxidation occurs is lowered. Airplanes
  equipped with carbon brakes are susceptible to catalytic oxidation
  caused by exposure to alkali metal runway deicers. - Boeing Aero
  Magazine


Brake manufacturers produce Oxidation resistant brakes. The effects of can be obtained by using carbon brakes, or using a coating on the brake rotor and friction surfaces. 

Best practices for carbon brake application according to Airbus.