The commonly used chemical raw materials for snow melting mainly include the following categories:
1. Sodium chloride (NaCl) - table salt
Features: Low price, easy to obtain.
Disadvantages: The effect is poor at extremely low temperatures (below -9 ° C), and it is corrosive to the environment and infrastructure.
2. Calcium chloride (CaCl ₂)
Characteristics: It is still effective at low temperatures (as low as -29 ° C) and has a rapid effect.
Disadvantages: High cost, corrosive to metals and concrete.
3. Magnesium chloride (MgCl ₂)
Features: Effective at low temperatures, strong moisture absorption, and can prevent road icing.
Disadvantage: Corrosive to the environment and infrastructure.
4. Potassium acetate (CH3 COOK)
Characteristics: Environmentally friendly snow melting agent with low corrosiveness to plants and concrete.
Disadvantages: High cost, mainly used in areas sensitive to corrosion such as airports.
5. Urea (CO (NH ₂) ₂)
Characteristics: Relatively friendly to plants and soil.
Disadvantages: The snow melting effect is weak and may cause eutrophication of the water body.
Chemical raw materials required for snow melting
6. Calcium magnesium acetate (CMA)
Characteristics: Environmentally friendly snow melting agent with low corrosiveness to the environment and infrastructure.
Disadvantages: High cost, slow snow melting speed.
7. Alcohols (such as methanol, ethanol)
Features: Lowering the freezing point, suitable for small-scale use.
Disadvantages: Flammable, high cost, not suitable for large-scale use.
Selection criteria:
Temperature: The effective temperature range of different chemicals varies.
Environmental impact: The impact on soil, plants, and water bodies needs to be considered.
Cost: Choose the appropriate snow melting agent based on the budget.
Corrosivity: Special attention should be paid when using near metal and concrete facilities.
