Environmental impact: NaCl is generally considered less harmful to the environment compared to AlCl3. While both can have negative effects on water quality and aquatic life if used excessively, AlCl3 is known to be more toxic and can cause acidification of water bodies.
Corrosion: NaCl is less corrosive to metal surfaces, including cars and infrastructure. AlCl3, being a stronger acid, can cause more severe corrosion and damage to vehicles and road structures.
Effectiveness: NaCl is effective at melting ice and preventing snow from bonding to the road surface, even at lower temperatures. AlCl3, while also effective, may require a higher concentration to achieve similar results, which can increase costs and potential environmental impact.
Cost-effectiveness: NaCl is generally more cost-effective than AlCl3. It is widely available and relatively inexpensive, making it a practical choice for large-scale road treatment.
Safety: NaCl is safer for use around humans and animals compared to AlCl3. AlCl3 can cause skin and eye irritation, and it can be harmful if ingested or inhaled.
Therefore, NaCl is the preferred salt for use on roads as it is less harmful to the environment, less corrosive, effective at melting ice, cost-effective, and safer for human and animal contact.
