Why is glycol considered a better brine than sodium chloride?

Glycol is considered a better brine than sodium chloride because it does not cause corrosion. In systems where brine solutions are used, especially in applications like de-icing or in cooling systems, the corrosive nature of sodium chloride can lead to significant damage to metal components. Glycol, on the other hand, is less aggressive chemically and provides a protective advantage, extending the lifespan of equipment and reducing maintenance costs. The non-corrosive property makes glycol suitable for use in many industrial applications where metal corrosion is a concern.

Considering the other options, the boiling point of glycol is not lower than that of sodium chloride solutions, and it has solidification properties that can be advantageous in mild climates but depends on the specific formulation of glycol used. Accessibility can vary based on regional availability; however, glycol's non-corrosive nature is a primary factor that often makes it preferable in applications requiring long-term system integrity and safety.