In this study, the corrosion protection of three silane based coatings on copper substrate was investigated in NaCl solution. For this purpose, tetraethoxysilane (TEOS), 3-Tri- methoxysilyl-1-propanethiol (TPS) and a hybrid TEOS+TPS were coated onto a Cu substrate by the sol-gel deposition method. The silane solution was prepared by dissolving silane agents in a mixture of distilled water and ethanol. The surface morphologies and chemical compositions of the coatings were assessed using atomic force microscopy (AFM), scanning electron microscopy (SEM), and Fourier transfer infrared spectrometer (FTIR). The corrosion behavior of uncoated and coated copper specimens was evaluated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and immersion tests. The results indicated that hybrid TEOS+TPS coating exhibited the best corrosion performance as compared with the copper substrate and singe TEOS and TPS coatings. This behavior was ascribed to the simultaneous formation of strong Cu-S and crosslink Si-O-Si bonds according to the FTIR observations. The surface topography studies by AFM after 120 hours immersion in 3.5 wt% NaCl demonstrated a little damage to the surface coating of TEOS + MPTMS than the two other coatings. These observations were in good agreement with the images obtained by optical microscopy. Furthermore, the coating surface morphological studies by SEM revealed that the ball like silica particles have been distributed on the copper substrate with particle sizes ranging from 75 to 250nm. Also, it was found that the TEOS+TPS coating exhibited similar corrosion resistance in different chloride ion concentrations (1.5, 2.5 and 3.5 wt% sodium chloride) It was also demonstrated that the corrosion behavior of TEOS+TPS coating in the Persian Gulf electrolyte was similar to that performed in 3.5 wt% NaCl. Keywords: Silane coating, Corrosion, Copper, Chloride ion, Hydrophobic