Hydrogen embrittlement (HE) is a critical issue affecting the mechanical integrity of metallic components, particularly in the energy sector. This study investigates the influence of hydrogen charging on the mechanical properties of C40 steel specimens through the fundamentals of the electrolysis method, using hydrochloric acid and saline solutions in the preliminary stage, concluding with a final electrolytical solution that included two buffers and one poisoning agent (acetic acid and sodium acetate trihydrate, and sodium sulfide nonahydrate, respectively). The specimens, with a thickness of 3 mm, length of 90 mm, and width of 22 mm (with a central notch and lateral radius R2 mm), at the preliminary stage were subjected to electrochemical hydrogen charging (EHC) at different current conditions for varying durations: 4 h, 6 h, 17 h, and 24 h, concluding with a duration of 24 hours for the final configuration with constant current density of 0.06 mA/cm².