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Characterization and corrosion behavior of multilayer [TiN/TiCN]n growth on AISI 316LVM steel

Abstract:

In this paper a study of the corrosion resistance is shown in a physiological medium of multilayer coatings [TiN/TiCN]n with periods bilayers of 1, 50 and 150 deposited on silicon substrates (100) and stainless steel AISI 316 LVM by the method of RF magnetron reactive sputtering with an RF power (13.56 MHz) and using two targets of Ti and TiC. The electrochemical behavior simulated body environment was evaluated by the technique of using Tafel polarization curves, in Hanks solution as electrolyte. Morphological characterization was performed using scanning electron microscopy (SEM) on silicon substrates (100), also was used to characterize the mechanism of attack on the uncoated steel and coated steels. Was found to be markedly increased corrosion resistance to the deposition of multilayer coatings evidencing the effect of the spatial period (Λ) in reducing the degradation of these coatings, the effect was shown for the substrate alloy type stainless steel AISI 316 LVM, confirming the good performance of the variation of the bilayers period. © (2014) Trans Tech Publications, Switzerland.