Ceramic coatings of β tricalcium phosphate (β-TCP, Ca3(PO4)2) deposited by means of magnetron sputtering technique on AISI 316L stainless steel substrates were evaluated in terms of its corrosion behavior through electrochemical impedance spectroscopy after being immersed in Ringers' solution for 96hours.Structural molecular characterization of the coatings was carried out by X-ray diffraction (XRD) and Fourier transformed spectroscopy (FTIR).Coatings surface Properties were evaluated by scanning electron microscopy (SEM) and atomic force microscopy (AFM) during the different times of the essay.The immersion essay showed that the like single layer coating of β-TCP can mitigate corrosion of the steel since.Therefore, is possible to observe a change of 56.37% in corrosion rate values of AISI 316L stainless steel substrate comparing with corrosion rate of substrate coated with β-TCP coating under 96hours, but when is compared the β-TCP coating under 12hours with the β-TCP coating under 96hours of exposure time can be possible obtain an increasing of 56.7% in corrosion rate values.