Titanium nitride and titanium nitride Aluminum [TiN/TiAlN]n multilayers thin films were deposited onto (100) silicon substrates and AISI 1045 steel with 2, 6, 12 and 24 periods for bilayers systems via magnetron sputtering with reactive r.f. In order to study the effect of increasing the number in bilayer on conduct structural, and electrochemical corrosion for these films. Through X-ray diffraction (XRD) will study the crystallinity of films and by scanning electron microscopy (SEM) was analysed their morphology. The AISI 1045 steel samples were characterized, with and without [TiN/TiAlN]n coating via Tafel polarization curves under corrosive means with incident angles of 30 and 90. It was found that the corrosion rate in steel coated decreased compared to steel without coating for the two exposure angles. This phenomenon is associated with increased interfaces with increasing the multilayer numbers, thereby improving the corrosive properties of the substrate. It also showed the influence of the angle of incidence as a critical variable in increasing the corrosion speed getting lower values for the angle of 30 degrees, for all coated samples. The results reveal the electrochemical positive effect on the protection of 1045 steel surface with the increase in the period of multilayer [TiN/TiAlN]n.