What two ingredients are commonly used as oxygen scavengers?

Sodium sulfite and hydrazine are commonly used as oxygen scavengers in various applications, particularly in water treatment and boiler systems.

Sodium sulfite works by reacting with dissolved oxygen in water, effectively removing it and preventing corrosion in systems where oxygen can lead to damage. This is crucial in maintaining the integrity of boilers and piping systems, as oxygen can promote corrosion and rust formation.

Hydrazine also serves as an effective oxygen scavenger through a similar mechanism. It reacts with oxygen to form nitrogen gas and water, thus depleting the oxygen content in the system. This property makes it particularly useful in steam generating systems, where it can help to reduce the risk of corrosion and improve operational efficiency.

The combination of these two substances provides a reliable method for managing oxygen levels, ensuring the longevity and safety of industrial systems. Other options listed include combinations of compounds that do not possess the same level of efficacy as oxygen scavengers, which is why they are not considered the best answer.