Nowadays the WC-10Co-4Cr coatings deposited by HVOF are widely used to protect materials against corrosion and wear. Due to the high surface roughness of these coatings after spraying, grinding of coated substrate is inevitable. The aim of this study is to investigate the effect of depth of grinding on residual stress, corrosion, and tribocorrosion behavior of WC-10Co-4Cr coatings deposited by HVOF on carbon steel. The thickness of the as-sprayed coating on steel substrate was about 400 µm. In order to evaluate the effect of various grinding depth on coating properties four depth of grinding (i.e. 4, 10, 16 and 22 µm) were selected. X-Ray Diffraction results showed that after spraying, some of WC particles were changed to W 2 C due to decarburization. Porosity percent, surface roughness and microhardness of as-sprayed coating were respectively 0.5 percent, 3.666 µm, and 1301 Vickers. After grinding of coatings porosity percent and microhardness were increased to respectively 0.8 percent and 1333 Vickers and surface roughness was decreased to 0.181 µm. The compressive residual stress of as-sprayed coating was -297 MPa, which increased after grinding and finally, reached to -591 MPa for depth of 22 µm. Due to increasing the porosity and microcracks in surface and subsurface layers of coatings after grinding, the corrosion resistance of ground coatings was reduced. This was measured using potentiodynamic polarization and Electrochemical Impedance Spectroscopy (EIS) test. Results obtained showed that by increasing the depth of grinding, the diameter of nyquist semicircles was reduced and bod curves were moved downward. By fitting the EIS test results it was observed that the most corrosion resistant coatings were as-sprayed one and coating with 4 µm depth of grinding, and the least corrosion resistant coating was coating with 22 µm depth of grinding. In tribocorrosion test under open circuit potential condition, due to degradation of the passive layer during wearing, potentials of all coatings were dropped. The amount of potential drop for all coatings was in the range of 48-58 mV. By increasing the depth of grinding and thus increasing the porosity and microcracks in coatings, the open circuit potential of coatings moved toward more negative values. As a result, the curves of tribocorrosion test under open circuit potential were shifted to the more negative potentials. At the end of wearing process due to the formation of renewed passive layer, the potential of coating began to rise and became close to the initial value of open circuit potential. Key words Wc-10Co-4r, Grinding, Residual Stress, Corrosion, triobocorrosion, HVOF.