Abstract
Corrosion behavior of A356-10 vol.% SiC composites cast by gravity and squeeze casting is evaluated. For this purpose, prepared samples were immersed in H2SO4solution for 2 hrs. at open circuit potential. Tafel polarization and electrochemical impedance spectroscopy (EIS) were carried out to study the corrosion resistance of composites. The results showed that corrosion resistance of composites cast by squeeze casting is higher than that of the gravity cast composites. The micrographs of scanning electron microscope (SEM) clearly showed the squeeze casting composites exhibit a good dispersion/matrix interface when compared with composites produced by gravity casting.
Highlights
A356 aluminium alloy is a casting alloy consisting of aluminium, silicon, and magnesium
The scanning electron microscope (SEM) photographs of the surfaces of the gravity and squeeze casting composites are shown in Figures 3 and 4
(1) The SEM micrographs of the A356-10 vol.% SiC composites showed that the squeeze casting composite exhibits a good dispersion/matrix interface when compared with the composite produced by gravity process
Summary
A356 aluminium alloy is a casting alloy consisting of aluminium, silicon, and magnesium. It is distinguished by good mechanical characteristics and high ductility, as well as excellent casting characteristics and high corrosion resistance. The alloy is widely used in various types of machineries, aircraft, and defense industries. The alloy is used in automotive industries in order to replace steel components [1]. [2,3,4] These metal matrix composites (MMCs) have found widespread use in many engineering applications because of their good performance, such as high strength, high hardness, excellent wear resistance, low-heat expansion coefficient, and competitive cost [5,6,7,8,9,10,11]
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