RT Journal Article
T1 Effect of powder reuse on the corrosion behavior of anodized and Flash-Plasma Electrolytic Oxidation treated Laser-Powder Bed Fusion Ti-6Al-4V ELI
A1 Guerra Mutis, Marlon Hernando
A1 Arrabal Durán, Raúl
A1 Mohedano Sánchez, Marta
A1 Barrena Pérez, María Isabel
A1 Vega Vega, Jesus Manuel
A1 Díaz Gutiérrez, Javier
A1 Matykina, Endzhe
AB The present work compares the corrosion performance of additively manufactured (AM) Ti-6Al-4V ELI (Extra-Low Interstitials) alloy manufactured by Laser-Powder Bed Fusion (LPBF) using virgin powder (Cycle 1/C1 sample) and reused powder feedstock after up to 34 cycles (Cycle 34/C34 sample) of manufacturing. The effect of powder reuse is also evaluated for anodizing and Flash-PEO-coated specimens in Harrison’s (25 ◦C) and Hanks’ solutions (37 ◦C), representing simulated atmospheric precipitation and physiological conditions, respectively. Specimens were characterized using common metallographic techniques, Xray diffraction, scanning electron microscopy and optical profilometry. Corrosion resistance was evaluated using cyclic potentiodynamic polarization (PDP) tests. The oxygen content in the Ti-6Al-4V reaches 0.14 wt.% after 34 cycles (C34) of powder reuse, enhancing its passivity in both Harrison’s and Hanks’ solutions. Both virgin and reused powder builds are susceptible to localized corrosion in Hanks’ solution at potentials above 1.75 V. Melt pool borders are thought to be the preferential sites for localized corrosion, as indicated by Volta potential measurements (ΔV = 100 mV). The number of cycles does not significantly affect the current–voltage responses for anodizing and flash-Plasma Electrolytic Oxidation (Flash-PEO) treatments, although anodizing is slightly more responsive to variations in surface roughness (i.e., real specimen area). Anodizing and Flash-PEO reduce the passive current density by nearly two orders of magnitude. Even after surface treatment, the alloy printed with reused powder revealed better passivity. Flash-PEO coatings yielded significant protection against localized corrosion. This unlocks Flash-PEO processing as a successful protection approach for AM biomedical components.
PB MDPI
YR 2026
FD 2026-05-28
LK https://hdl.handle.net/20.500.14352/137480
UL https://hdl.handle.net/20.500.14352/137480
LA eng
NO Guerra-Mutis, M. H., Arrabal, R., Mohedano, M., Barrena, M. I., Vega, J. M., Gutiérrez, J. D., & Matykina, E. (2026). Effect of Powder Reuse on the Corrosion Behavior of Anodized and Flash-Plasma Electrolytic Oxidation-Treated Laser-Powder Bed Fusion Ti-6Al-4V ELI. Coatings, 16(6), 655. https://doi.org/10.3390/coatings16060655
NO MICIU/AEI/10.13039/501100011033
NO RYC2021-034384-I
NO European Union NextGenerationEU/PRTR
DS Docta Complutense
RD 5 jul 2026