Search Results - "Castaño, J. G"

Characterization of titanium powders processed in n-hexane by high-energy ball milling by Restrepo, A. H., Ríos, J. M., Arango, F., Correa, E., Zuleta, A. A., Valencia-Escobar, A., Bolivar, F. J., Castaño, J. G, Echeverría, F. E.

“…The effect of speed and milling time on the morphology, crystallite size, and phase composition of Ti Cp powders processed in n-hexane by high-energy ball…”
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Improved two-step Brytal process for electropolishing of aluminum alloys by Sepúlveda, M., Quintero, D., Castaño, J.G, Echeverría, F.

“…•Aluminium alloys were electropolishing using a two-step electropolishing process.•The second-phase particles in the electropolishing process are not…”
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Study of the formation of alkaline electroless Ni-P coating on magnesium and AZ31B magnesium alloy by Zuleta, A.A., Correa, E., Castaño, J.G., Echeverría, F., Baron-Wiecheć, A., Skeldon, P., Thompson, G.E.

“…In this work, alkaline electroless Ni-P coatings were directly formed on commercial purity magnesium and AZ31B magnesium alloy substrates using a process that…”
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Fabrication of highly-ordered TiO2 nanocolumns by two-step anodizing of an Al/Ti layer in etidronic acid by Sepúlveda, M., Castaño, J.G., Echeverría, F.

“…TiO2 nanocolumns were fabricated by a two-step anodizing process of an Al/Ti bilayer system and using as electrolyte 0.3 M etidronic acid at 40 °C. To prepare…”
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Comparison among the lubricated and unlubricated tribological behavior of coatings obtained by PEO on the Ti6Al4V alloy in alkaline solutions by Ríos, J.M., Quintero, D., Castaño, J.G., Echeverría, F., Gómez, M.A.

“…Coatings were obtained in electrolytes with different phosphorus source by Plasma Electrolytic Oxidation (PEO). Anatase phase (TiO2) is the main crystalline…”
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Effect of the Time-Temperature Conditions of Annealing on the Corrosion Resistance of Electroless Ni–P Coatings by Dzib-Pérez, L., Bilyy, O., Leon-Gronimo, A., Castaño-Gonzalez, J. G., Quintana, P., Domínguez-Maldonado, R., González-Sánchez, J.

“…We analyze the effect of different temperature-time conditions of the process of annealing applied to electroless Ni–P (12 wt.% P) coatings in order to improve…”
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New strategy to assess the performance of organic coatings during ultraviolet–condensation weathering tests by Bedoya, F.E., Gallego, L.M., Bermúdez, A., Castaño, J.G., Echeverría, F., Calderón, J.A., Maya, J.G.

“…•Long term cyclic tests sometimes are not enough to assess organic coating performance.•Changes in electrochemical properties within a cycle correspond to poor…”
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Influence of temperature and time on the fabrication of self-ordering porous alumina by anodizing in etidronic acid by Sepúlveda, M., Castaño, J.G., Echeverría, F.

“…[Display omitted] •High purity aluminum was anodized using etidronic acid at 25 °C and 40 °C.•Fast Fourier Transform analyses of the aluminum nanotexture were…”
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Effect of electrochemical parameters on the formation of anodic films on commercially pure titanium by plasma electrolytic oxidation by Quintero, D., Galvis, O., Calderón, J.A., Castaño, J.G., Echeverría, F.

“…In this paper the effect of current density and anodizing potential on both surface morphology and internal structure of Ti anodic coatings were studied…”
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Atmospheric corrosion of carbon steel in Colombia by Castaño, J.G., Botero, C.A., Restrepo, A.H., Agudelo, E.A., Correa, E., Echeverría, F.

“…The corrosion behaviour of carbon steel at six test sites in Colombia and its relationship with exposure time and environmental characteristics of each site…”
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Formation of grooved and porous coatings on titanium by plasma electrolytic oxidation in H2SO4/H3PO4 electrolytes and effects of coating morphology on adhesive bonding by Galvis, O.A., Quintero, D., Castaño, J.G., Liu, H., Thompson, G.E., Skeldon, P., Echeverría, F.

“…The paper reports a change in the morphology of coatings formed galvanostatically on titanium by plasma electrolytic oxidation in phosphoric/sulfuric acid…”
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Tribological behavior of electroless Ni–B coatings on magnesium and AZ91D alloy by Correa, E., Zuleta, A.A., Guerra, L., Gómez, M.A., Castaño, J.G., Echeverría, F., Liu, H., Skeldon, P., Thompson, G.E.

“…Ni–B coatings have been deposited directly on commercial purity magnesium and AZ91D alloy and characterized using glow discharge optical emission spectroscopy,…”
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Control of the physical properties of anodic coatings obtained by plasma electrolytic oxidation on Ti6Al4V alloy by Quintero, D., Galvis, O., Calderón, J.A., Gómez, M.A., Castaño, J.G., Echeverría, F., Habazaki, H.

“…Spark anodizing on Ti6Al4V has been performed in three alkaline solutions using different electrical parameters in order to study the coating formation. The…”
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Simplified Mathematical Model for Concrete Carbonation by Torres, H, Correa, E, Castaño, J. G, Echeverría, F

“…AbstractA simplified mathematical model for concrete carbonation has been developed and compared with data from accelerated and real exposures. A chamber for…”
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Long-term atmospheric corrosion of zinc by de la Fuente, D., Castaño, J.G., Morcillo, M.

“…A great deal of information is available on the short- and mid-term atmospheric corrosion of zinc: corrosion rate data as a function of atmosphere type,…”
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Coating development during electroless Ni–B plating on magnesium and AZ91D alloy by Correa, E., Zuleta, A.A., Guerra, L., Gómez, M.A., Castaño, J.G., Echeverría, F., Liu, H., Baron-Wiecheć, A., Hashimoto, T., Skeldon, P., Thompson, G.E.

“…The progress of formation of electroless Ni–B coatings is investigated on pure magnesium and AZ91D alloy. A non-chromate-based electroless treatment is…”
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Effect of EDTA addition on the biotribological properties of coatings obtained from PEO on the Ti6Al4V alloy in a phosphate-based solution by Ríos, J.M., Quintero, D., Castaño, J.G., Echeverría, F., Gómez, M.A.

“…• EDTA additions modify coatings characteristics, increase coating thickness, crystallite size as well as pores size compared to the coating without EDTA.•…”
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Huntingtin Expression Stimulates Endosomal-Lysosomal Activity, Endosome Tubulation, and Autophagy by Kegel, Kimberly B, Kim, Manho, Sapp, Ellen, McIntyre, Charmian, Castano, Jose G, Aronin, Neil, DiFiglia, Marian

“…An expansion of polyglutamines in the N terminus of huntingtin causes Huntington's disease (HD) and results in the accrual of mutant protein in the nucleus and…”
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Comparative study of different environmentally friendly (Chromium-free) methods for surface modification of pure magnesium by Zuleta, A.A., Correa, E., Villada, C., Sepúlveda, M., Castaño, J.G., Echeverría, F.

“…In this work, three different chromium-free methods of surface modification of pure magnesium were studied; namely, a cerium conversion coating, a carbonated…”
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Effect of NH4HF2 on deposition of alkaline electroless Ni–P coatings as a chromium-free pre-treatment for magnesium by Zuleta, A.A., Correa, E., Sepúlveda, M., Guerra, L., Castaño, J.G., Echeverría, F., Skeldon, P., Thompson, G.E.

“…► A chromium-free, alkaline electroless nickel pre-treatment is developed for magnesium. ► The bath composition is optimized with respect to coating kinetics…”
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