Technique Coating Reference Balanced magnetron Nano-composites of NC-TiC wear applications (Pavel, et al., 2011) Balanced magnetron Optical properties of AlSiN nano-composites (Liu, et al., 2009) Balanced magnetron Hard coatings to decorative applications (Raymond & Baham, 1999) Balanced magnetron Nd-Fe-B Film for magnetic applications (Liu, et al., 20007) Balanced magnetron Optical applications. (Stefan, et al., 2008) Unbalanced magnetron Hard films for corrosion and wear applications (Rodil & Olaya, 2006). Unbalanced magnetron Nb Films for biological applications (Olivares, et al.,2011) Unbalanced magnetron NbO films for biological applications (Ramirez, et al., 2011) Unbalanced magnetron Electrical applications of NbN films. (Olaya, et al., 2008,) Unbalanced magnetron Diamond-like carbon films for infrared transmission enhancement (Lingxia & Xu, 2000).

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ZrN-ZrO$${ }_{x}$$ x N$${ }_{y}$$ y and ZrO$${ }_{2}$$ 2 -ZrO$${ }_{x}$$ x N$${ }_{y}$$ y coatings were deposited on 316L stainless steel substrates via the unbalanced DC magnetron sputtering technique in order to improve their corrosion resistance and evaluate their possible use as a coating biocompatible with bone cells. The composition, structure, morphology, and corrosion resistance were studied by sum means of x-ray photoelectron spectroscopy (XPS), x-Ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). The corrosion resistance was evaluated in 3.5 wt.% NaCl using potentiodynamic polarization (PL) and electrochemical impedance techniques (EIS). The ZrN-ZrO$${ }_{x}$$ x N$${ }_{y}$$ y and ZrO$${ }_{2}$$ 2 -ZrO$${ }_{x}$$ x N$${ }_{y}$$ y coatings exhibited barrier-type protection of the substrate against corrosion. The growth of mouse osteoblast cells was evaluated in the coating that exhibited the greatest resistance to corrosion, ZrO$${ }_{2}$$ 2 -ZrO$${ }_{x}$$ x N$${ }_{y}$$ y , finding that the cell viability was maintained, so this material can be considered to be a candidate for use in osteosynthesis processes.

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