d Zr targets. The synthesis of the coatings was carried out by varying the discharge power in the Ti5 well as a variation in the deposit temperature at room temperature 130° and 260°C. The coatings were characterized by means of X-ray diffraction (XRD), evidencing the formation of the phase that belongs to the solid solution (Zr, Ti)N, scanning electron microscopy (SEM), UV-Vis spectroscopy and hardness and pin-on-disc tests. The thickness was measured through interferometry with values between 662 and 481nm for the deposited coatings. According to the failure mechanism in the scratch test, the best results were obtained with a power of 170W and 260°C with a cohesive failure Lc1 = 2.1N and an adhesive failure Lc2 = 4.7N.
Objetivo: En este artículo se presenta una metodología mixta de selección de materiales para determinar qué material presenta la mejor relación entre resistencia a la corrosión, propiedades mecánicas y costos. Metodología: El trabajo se llevó a cabo utilizando pruebas potenciodinámicas de extrapolación (Tafel) e impedancia electroquímica (EIS), sometiendo las muestras a medios corrosivos de NaCl (3%) y H2SO4 (5%). Las muestras utilizadas fueron el cerámico Zirconia no sinterizada y los aceros AISI 304L, AISI 316 y AISI 316L. Finalmente se aplicó una metodología de selección de materiales para escoger el material que presenta mejor comportamiento en este tipo de medios. Resultados: Como resultado, para las pruebas de extrapolación Tafel con 5% de ácido sulfúrico (H2SO4), se obtuvo que el acero AISI 316 presenta la corriente de corrosión más baja y una pasivación a mayor potencia. En el medio electrolítico con 3%de NaCl, se observa que los valores de potencial de corrosión más altos se presentan en los aceros inoxidables, evidenciándose una menor velocidad de corrosión en los aceros de la serie 316. Conclusiones: Como resultado se obtuvo que el acero AISI 316 utilizado presenta el mejor comportamiento de resistencia a la corrosión en los medios Medios ácidos y salinos.Abstract Objective: This article presents a mixed materials selection methodology is presented to determine which material has the best balance between corrosion resistance, mechanical properties and costs. Methods: The work was realized using potentiodynamic tests of extrapolation (Tafel) and electrochemical impedance (EIS), subjecting the samples to corrosive media of NaCl (3%) and H2SO4 (5%). The samples used were zirconia, steel AISI 304L, AISI 316 and AISI 316L. Finally a mixed methodology was applied in the materials selection to choose the material that has better comportment in this type of electrolyte. Results: For Tafel extrapolation test with 5% sulfuric acid (H2SO4) was obtained that AISI 316 steel which has the lowest current corrosion and passivation at higher power. In the electrolytic medium with 3 % NaCl, shows that higher values for corrosion potential present in stainless steels, showing a lower corrosion rate in the steels of the 316 series. Conclusions: The results showed that steel AISI 316 used presents the best performance to corrosion resistance in saline and acid.Palabras claves: Corrosión, Medios ácidos y salinos, Metodología mixta, Selección de materiales.
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