Conventional antifreezes use what type of additives to achieve corrosion and scale protection?

Conventional antifreezes use what type of additives to achieve corrosion and scale protection?

• A. Inorganic
• B. Organic
• C. Organic and inorganic mixed
• D. Silicate-free polymers

Answer: (A)

Conventional antifreezes rely on inorganic corrosion inhibitors to protect metal surfaces in the cooling system. These additives, such as silicates and phosphates, form protective films on metals like iron, steel, copper alloys, and aluminum, passivating the surface to prevent corrosion. They also help control mineral scale by buffering the chemistry and tying up hardness minerals before they precipitate. Organic additives are used in other formulations (organic acid technologies) and some modern or hybrid products, but traditional, or conventional, antifreezes specifically depend on inorganic inhibitors. Silicate-free polymers represent a different, newer approach and aren’t the standard for conventional formulations.

Conventional antifreezes rely on inorganic corrosion inhibitors to protect metal surfaces in the cooling system. These additives, such as silicates and phosphates, form protective films on metals like iron, steel, copper alloys, and aluminum, passivating the surface to prevent corrosion. They also help control mineral scale by buffering the chemistry and tying up hardness minerals before they precipitate.

Organic additives are used in other formulations (organic acid technologies) and some modern or hybrid products, but traditional, or conventional, antifreezes specifically depend on inorganic inhibitors. Silicate-free polymers represent a different, newer approach and aren’t the standard for conventional formulations.