🔍 Key Concepts

• Electrolytic (galvanic) corrosion basics: what two main things are needed for it to occur? • The importance of dissimilar metals in an electrolyte and how that affects corrosion rates • Typical material selection and water treatment practices in modern water‑tube boilers

💭 Think About

• Think about what specifically causes galvanic/electrolytic corrosion: is it mostly about pressure, the strength of the electrolyte, or the metals involved? • Ask yourself which option describes a design or operating practice that would reduce the driving force for galvanic corrosion rather than just changing conditions like pressure. • Which choice matches standard engineering practice in boiler construction, rather than a statement that sounds absolute or extreme (e.g., "cannot occur")?

✅ Before You Answer

• Verify which option addresses the need for dissimilar metals for strong galvanic action. • Check if any answer incorrectly suggests that electrolytic action is impossible under certain pressures or conditions (be cautious of absolute claims). • Consider which choice reflects a common design feature of modern water‑tube boilers rather than a chemical treatment effect that may vary with operation.