Abstract
In this investigation, Zn-Al alloy metal-matrix nano composites that reinforced via various weight percentages (2%, 4%, 6%, and 8%) of nanosilica (SiO2) particles were fabricated applying the technique of stir casting. Behaviors of the corrosion of the unreinforced alloy and reinforced composites were measured utilizing a potentiostat test in a (3.5 wt.% NaCl) salt solution. The optical microscopy was employed to investigate the surface microstructure of the composite. Microstructure analysis manifested that the uniform distributions of the reinforcing particles in the composites are alike, consisting of a dendritic structure of the zinc alloy matrix with an excellent reinforcing particles steady dispersion. The improved results of the corrosion resistance for the metal matrix composites showed an excellent resistance to corrosion than the matrix in the (3.5 wt.% NaCl) solution. Raising the weight percentage of the reinforcement particulates of nansilica (SiO2) reduced the composites rate of corrosion.
Highlights
High zinc-aluminum alloy (ZA alloys) have been of interest both research and industrial field, as a considerable potential tribo-materiale for the last little decades
Seah et al [7] presented that the hardness of the as cast is reduced when reinforcing the graphite particles in a ZA-27 alloy and simultaneously, it raised for the aged samples after comparing the as-cast hardness
Babic et al [8] showed that the results decreased in the ultimate tensile strength and hardness with a rise in the elongation of the alloy when compared with the casting and the heat treatment of the ZA-27 alloy reinforced with Gr
Summary
High zinc-aluminum alloy (ZA alloys) have been of interest both research and industrial field, as a considerable potential tribo-materiale for the last little decades. The excellent mechanical and physical properties, unique properties of finishing, and atmospheric corrosion resistance have assisted the zinc alloys die casting to withstand the time tests after being utilized in a great number of uses with a substantial fame [2]. They let for a more significant difference in the design of section and the closer dimensional tolerances maintenance [3]. The work of the present investigation aims to evaluate the corrosion behaviour and microstructure of Zinc-aluminum alloy via utilizing alloys made via stir casting and study influence of adding various percentages of Nanosilica (SiO2) particles upon the Znic alloy
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