The brake system is a core component of cars, motorbikes, bikes, airplanes etc.. Its main task is to modulate the speed of moving vehicles by converting the kinetic energy into heat.1,2 In the case of modern cars or motorbikes, the speed modulation can be performed by using the so-called disc-brake system.1,2,3,4,5,6 This generates the braking torque by forcing two brake pads against a disc by the means of a caliper.2,3,5,6 In the case of cars, the disc and the caliper are enclosed within each wheel and, as a consequence, can be exposed to corrosion phenomena, mostly related with atmospheric or environmental conditions.1,3,7,8