Abstract 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.

中文翻译：

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挤压铸造 SiC 纳米颗粒增强 AZ91-2.0Ca-0.3Sb 合金腐蚀响应的改善

摘要 本工作研究了 SiC 纳米颗粒添加对挤压铸造 AZ91 + 2.0Ca+0.3Sb (wt.%) 合金在 0.1 M NaCl 溶液中浸泡、析氢和动电位极化扫描的腐蚀响应的影响。所有 AZ91 + 2.0Ca+0.3Sb + xSiCnp (x = 0.5, 1.0, 2.0 (wt.%)) 纳米复合材料都表现出比合金优越的耐腐蚀性能，用 2.0SiCnp 增强的纳米复合材料表现出最高的耐腐蚀性。纳米复合材料的腐蚀性能改善归因于 α-Mg 和 β-Mg17Al12 相之间的电位差减小，β-Mg17Al12 相的数量减少，以及添加 SiC 纳米颗粒后 Al2Ca 相的数量增加。