How does the purity of aluminum affect its properties and uses?

The purity of aluminum significantly affects its properties and uses. High-purity aluminum is soft, ductile, and has excellent electrical and thermal conductivity, making it ideal for applications like electrical wiring and heat sinks. However, its low strength limits its structural applications. To enhance its strength, aluminum is often alloyed with elements like copper, magnesium, and silicon, which increase its hardness and strength while maintaining lightness. These alloys are used in various industries, including aerospace, automotive, and construction. The purity also influences corrosion resistance; high-purity aluminum is more resistant to corrosion than its alloyed counterparts. Therefore, the choice of aluminum's purity and alloying depends on the specific requirements of the intended application.