<p>This research demonstrates an approach of deposition of mechanically alloyed brass feedstock powder by Cold Gas Dynamic Spray (CGDS) process at a low-pressure mode, followed by surface passivation to enhance the corrosion resistance of copper-based materials. In this study, surface post-treatments were conducted on both pure copper and CGDS brass-coated substrates, and their electrochemical properties were analyzed in a comparative study. Open circuit potential (OCP), linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) were utilized to evaluate corrosion behavior and to study the electrochemical response of the tested systems. The findings indicate that the passivation solution of benzotriazole (C₆H₅N₃) in ethanol provided the best protective properties, highlighting its potential for enhancing the longevity of copper-based materials and CGDS coatings. Additionally, all materials were characterized by field emission scanning electron microscopy (FE-SEM) to evaluate specific features of the CGDS coating structure formation from mechanically alloyed brass feedstock powders, X-ray diffraction (XRD) to determine the phase composition, and microhardness testing to assess the material’s mechanical properties, along with statistical data analysis using the Weibull distribution. The findings of this research reveal the effectiveness of combining CGDS coating and specific passivation solutions to develop durable, corrosion-resistant copper-based components.</p>