The two common chemicals which are the...

Question 1 / 270705eccefa0bacbc34ba4d46fba

Question 1 of 270705eccefa0bacbc34ba4d46fba

The two common chemicals which are the primary cause of internal boiler corrosion are _______.

Question 1 of 27070

The two common chemicals which are the primary cause of internal boiler corrosion are _______.

🔍 Key Concepts

• Boiler water chemistry and how it prevents corrosion • Difference between chemicals that cause corrosion vs. chemicals added to control or prevent corrosion • Role of dissolved gases (like oxygen) in attacking metal surfaces

💭 Think About

• Look at each choice and ask: is this pair of substances normally present in a boiler as a contaminant that attacks metal, or as a treatment chemical added by engineers? • Think about what happens when untreated feedwater enters a boiler and is heated: which substances naturally present in water (and from its breakdown) would attack steel from the inside? • For the options that include treatment chemicals, what are those chemicals usually used for in boiler water programs?

✅ Before You Answer

• Identify which listed substances are commonly used as oxygen scavengers or corrosion inhibitors (these are usually not the main cause of corrosion). • Recall that dissolved gases in feedwater are a major concern in boiler design and operation. • Make sure you distinguish between corrosion products and conditioning or treatment chemicals added intentionally.

Question 1 of 27070

The two common chemicals which are the primary cause of internal boiler corrosion are _______.

carbon monoxide and sodium sulfite

dissolved oxygen and hydroxyl ions

phosphates and chromates

chromates and hydrazine

Question 1 / 270705eccefa0bacbc34ba4d46fba

Question 1 of 270705eccefa0bacbc34ba4d46fba

The two common chemicals which are the primary cause of internal boiler corrosion are _______.

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Question 1 of 27070

The two common chemicals which are the primary cause of internal boiler corrosion are _______.