What is the purpose of adding Hydrazine to the condensate/feedwater system?

The inclusion of Hydrazine in the condensate/feedwater system primarily serves to reduce corrosion. Hydrazine acts as a corrosion inhibitor, protecting metal surfaces within the system from oxidizing agents such as oxygen present in the feedwater. By reacting with dissolved oxygen, Hydrazine helps to prevent the formation of harmful corrosion products that can lead to pitting and other damage to the boiler and associated piping. This is particularly important in maintaining the integrity of the system and ensuring operational reliability.

The other options do not address the primary role of Hydrazine accurately. Increasing conductivity does not relate to the function of Hydrazine and can actually lead to other complications. Enhancing thermal efficiency is more about the design of the system and not related directly to chemical additives. Balancing pH levels typically involves other chemicals that are specifically designed to adjust acidity or alkalinity, rather than using Hydrazine for that purpose. Thus, the primary goal of introducing Hydrazine is indeed to reduce corrosion, ensuring a more efficient and longer-lasting system.