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The choice of antioxidant is crucial and can depend on several factors, including the type of plastic material, processing conditions, and the intended application. For instance, polyolefins, which are commonly used in various applications, often benefit from hindered phenolic antioxidants due to their thermal stability and compatibility with the substrate. Meanwhile, engineering plastics like polycarbonate may require different types of antioxidants that can provide protection at elevated temperatures.


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Dissolved gases, particularly oxygen and carbon dioxide, can also pose significant risks in boiler systems. Oxygen facilitates corrosion, while carbon dioxide can combine with water to form carbonic acid, lowering pH and increasing corrosive potential. Deaerators are utilized to remove these gases from the feedwater, but often, chemical oxygen scavengers such as hydrazine or sulfites are included in the treatment regimen. These compounds effectively neutralize dissolved oxygen, protecting the boiler from corrosion.


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One of the primary advantages of using PAM in water treatment is its ability to enhance the settling of suspended solids. By promoting flocculation, PAM binds tiny particles together, allowing them to form larger aggregates or flocs. This process makes it easier to remove these impurities during sedimentation or filtration, resulting in clearer water.


In conclusion, the chemical treatment of chilled water systems is essential for overcoming challenges related to scale, corrosion, and microbial growth. By utilizing the appropriate chemical agents, implementing rigorous monitoring practices, and adhering to regulations, facility managers can ensure optimal performance of their chilled water systems. This not only enhances energy efficiency and operational reliability but also safeguards the health and comfort of building occupants. Investing in a well-planned chemical treatment program is, therefore, a crucial aspect of effective chilled water system management.


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