RT info:eu-repo/semantics/article
T1 Comparative study on microstructure and corrosion resistance of Al-Si alloy cast from sand mold and binder jetting mold
A1 Castro Sastre, María Ángeles
A1 García Cabezón, Ana Cristina
A1 Fernández Abia, Ana Isabel
A1 Martín Pedrosa, Fernando
A1 Barreiro, Joaquín
K1 Binder jetting
K1 Inyección de aglutinante
K1 Aluminum alloys
K1 Aleaciones de aluminio
K1 Microstructures
K1 Microstructuras
K1 Corrosion
K1 Corrosión
AB This investigation is focused on the corrosion evaluation of an as-cast Al-Si alloy, obtained by two different casting methods: traditional sand casting and three-printing casting, using a binder jetted mold. The experimental results are discussed in terms of chemical composition, microstructure, hardness, and corrosion behavior of two different casting parts. The microstructure and composition of the sample before and after the corrosion tests was analyzed using light microscopy (OM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (DRX). The corrosion of the two processed castings was analyzed using anodic polarization (PA) test and electrochemical impedance spectroscopy (EIS) in an aerated solution of 3.5% by weight NaCl, similar to the seawater environment. After the corrosion process, the samples were analyzed by inductively coupled plasma/optical emission spectrometry (ICP/OES); the composition was used to determine the chloride solution after immersion times. The sample processed by binder jetting mold showed higher corrosion resistance with nobler potentials, lower corrosion densities, higher polarization resistance, and more stable passive layers than the sample processed by sand casting. This improvement of corrosion resistance could be related to the presence of coarse silicon particles, which decrease of cathodic/anodic ratio and the number of micro-galvanic couples, and the lower amount of intermetallic β Al-Fe-Si phase observed in cast alloy solidified in binder jetting mold.
PB MDPI
SN 2075-4701
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/49308
UL https://uvadoc.uva.es/handle/10324/49308
LA eng
NO Metals, 2021, vol. 11, n. 9. 1421
NO Producción Científica
DS UVaDOC
RD 22-nov-2024