Scale corrosion inhibitor chemicals for cooling towers are used to prevent the buildup of scale and corrosion within the system, maintaining heat transfer efficiency and preventing system damage. These chemicals typically work by controlling mineral deposits (like calcium carbonate) and reducing the corrosive effects of water on metal surfaces.
Key Details:
Active Ingredients:
Phosphonates: Commonly used to prevent scale formation and reduce corrosion. Examples include aminotrimethylenephosphonic acid (ATMP) and hydroxyethylidene diphosphonic acid (HEDP).
Polymeric Dispersants: These help to disperse scale-forming minerals and prevent their precipitation.
Organic Acids: Such as citric or acetic acid, can help control scale.
Zinc Compounds: Sometimes included to provide corrosion protection.
Functions:
Scale Prevention: Stops mineral deposits like calcium carbonate from forming on heat exchangers and pipes.
Corrosion Protection: Reduces metal corrosion, especially in systems with high water conductivity or aggressive water chemistry.
Improved Heat Transfer: Prevents scale that can reduce heat transfer efficiency.
Water Softening: Can work in tandem with water treatment programs to manage hardness in the cooling water.
Application:
Typically used in liquid or concentrate form, injected into the cooling tower system.
Dosage depends on water quality, system size, and the specific chemicals used.
Common Brands/Products:
BASF (Anticorrosion and Scale Control)
Nalco (ScaleGard series)
AkzoNobel (SABO Scale Inhibitors)
These inhibitors help reduce maintenance costs and prolong the life of the system.
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