Resumo

APERADOR, W  e  RAMIREZ-MARTIN, C. Sinergia entre la corrosión erosión del acero 1045 recubierto por multicapas de TiN/TiAlN. Rev. mex. fis. [online]. 2011, vol.57, n.4, pp.350-355. 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.

Palavras-chave : Titanium-aluminum nitride; corrosión dynamics; corrosion erosion; scanning electron microscopy.

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