Sinergia entre la corrosión erosión del acero 1045 recubierto por multicapas de TiN/TiAlN

W. Aperador, C. Ramírez-Martin, J. Bautista Ruiz

Abstract


This paper presents the results of the evaluation to the resistance to dynamic corrosion, erosion and corrosion-erosion at an impact angle of 90$^{\circ}$ 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 magnetron 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 electron microscopy. There was a significant decrease in the corrosion rate for the coated samples in terms of dynamic corrosion 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 corrosion and erosion corrosion. The results of scanning electron microscopy showed a good sealing of the bilayers, which confirms the protective effect given by the substrate coatings.

Keywords


Titanium-aluminum nitride; corrosion dynamics; corrosion erosion; erosion; scanning electron microscopy

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Revista Mexicana de Física

ISSN: 2683-2224 (on line), 0035-001X (print)

Bimonthly publication of Sociedad Mexicana de Física, A.C.
Departamento de Física, 2o. Piso, Facultad de Ciencias, UNAM.
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