This study presents an alternative to improve the conventional methods of diagnosis in the automotive brake rotors of light vehicles, through the application of non-destructive testing (NDT) such as infrared thermography (IRT) with a variation in the form of application of the step heating technique to dynamic heating, with the specifications of ISO 18434-1 and visible liquid penetrant testing (PT) according to ASTM E 165-02, for this it is necessary to chemically characterize the brake rotor material according to ASTM E1085-16 and the energy dispersive X-ray fluorescence spectrometry technique, where an approximation of SAE 1215 steel is obtained. The influence of these methods in the alternative predictive diagnosis of brake rotors was evaluated, comparing them with the conventional methods of visual testing (VT) and thickness control. The alternative IRT method allows the analysis and sectorization of the defectologies located on the brake rotor, including the friction ring, cooling vanes and rotor hat, the defects found include crystallization, grooves, pitting, cracks, wear, and rust. To evaluate the reliability of the results, an analogy of the mentioned tests on the same defect is made, and it is concluded that the IRT method is the most effective, it has a superior inspection coverage of 8.33% compared to the VT method and 33.66% compared to the PT method, to clearly visualize the defects Fluke SmartView is used.

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