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Improved corrosion response of squeeze-cast SiC nanoparticles reinforced AZ91-2.0Ca-0.3Sb alloy

Ganguly, S and Mondal, AK and Sarkar, S and Basu, A and Kumar, S and Blawert, C (2020) Improved corrosion response of squeeze-cast SiC nanoparticles reinforced AZ91-2.0Ca-0.3Sb alloy. In: Corrosion Science .

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Official URL: https://dx.doi.org/10.1016/j.corsci.2020.108444


The present work investigates the effect of SiC nanoparticle additions on corrosion response of the squeeze-cast AZ91 + 2.0Ca+0.3Sb (wt.) alloy subjected to immersion, hydrogen evolution, and potentiodynamic polarization scan in a 0.1 M NaCl solution. All the AZ91 + 2.0Ca+0.3Sb + xSiCnp (x = 0.5, 1.0, 2.0 (wt.)) nanocomposites demonstrate a superior corrosion resistance than the alloy, and the nanocomposite reinforced with 2.0SiCnp exhibits the highest corrosion resistance. The improved corrosion performance of the nanocomposites is attributed to the decrease in the potential difference between α-Mg and β-Mg17Al12 phases, reduced quantity of β-Mg17Al12 phase, and an increased amount of Al2Ca phase following SiC nanoparticles additions.

Item Type: Journal Article
Publication: Corrosion Science
Publisher: Elsevier Ltd
Additional Information: Copyright of this article belongs to Elsevier Ltd
Keywords: Antimony alloys; Binary alloys; Corrosion resistance; Corrosion resistant alloys; Magnesium alloys; Nanocomposites; Nanoparticles; Polarization; Potentiodynamic polarization; Reinforcement; Silicon alloys; Silicon carbide; Sodium chloride; Squeeze casting; Surface topography; Topography, AZ91 magnesium alloys; Corrosion performance; Hydrogen evolution; Mg17Al12 phase; NaCl solution; Potential difference; SiC nanoparticles; Volta potential, Calcium alloys
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 06 Feb 2020 10:22
Last Modified: 06 Feb 2020 10:22
URI: http://eprints.iisc.ac.in/id/eprint/64479

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