Revista mexicana de física
Print version ISSN 0035-001X
This paper presents the results of the evaluation to the resistance to dynamic corrosión, erosión and corrosion-erosion at an impact angle of 90° of thin films in the form of multilayer TiN / TiAlN deposited with periods of 2, 6, 12 and 24 bilayers on substrates of AISI 1045 steel, through a system with rf reactive magnetrón sputtering from Ti and Al targets of high purity (99.99%) in an atmosphere composed of Ar / N. The electrochemical characterization was carried out by using Tafel polarization curves and microstructural characterization by scanning electrón microscopy. There was a significant decrease in the corrosión rate for the coated samples in terms of dynamic corrosión and corrosion-erosion. The sample covered by 24 bilayers had the best behavior in both situations, confirming a good performance of the bilayers to the resistance to corrosión and erosión corrosión. The results of scanning electrón microscopy showed a good sealing of the bilayers, which confirms the protective effect given by the substrate coatings.
Keywords : Titanium-aluminum nitride; corrosión dynamics; corrosion erosion; scanning electron microscopy.