In this study, SiC-Cu composite coatings were deposited on C45 steel substrate by using the plasma spray technique, under atmospheric or Argon gas ambiances. The plasma technologial parameters were (i) 50SiC50 Cu powder feedstock, (ii) 80g/min powderfeed rate, (Ui) 200L/min air spray rate, (iv) 380A plasma current, (v)50 mm spraying distance, and vi) under Air or Argon gas protection. After plasma sprayed, composite coatings were sealed by PTFE. The microstructure of sprayed coatings was exanimated by using scanning electron microscopy (SEM). The coating elemental analysis was performed by using Energy-dispersive X-ray spectroscopy (EDS). Electrochemical property of coatings was performed using polarization test and electrochemical imdedance spectroscopy. The obtained data indicated that this plasma spayed PTFE/SiC-Cu coating protected effectively the steel subtrate against corrosion in 3,5% NaCl solution.