🔍 Key Concepts

• Sacrificial anode purpose in preventing galvanic corrosion • Which parts of a condenser carry saltwater / seawater versus refrigerant • Where metal loss from corrosion is most likely: inside tubes, outside tubes, strainers, or coils

💭 Think About

• Ask yourself: which side of the system is in direct contact with conductive seawater that causes galvanic corrosion? • Think about which fluid (refrigerant or seawater) actually needs corrosion protection from a zinc anode, and which materials are usually protected. • Consider where it is easiest and most useful to bolt or mount a chunk of zinc so that it can be replaced periodically and electrically bonded to the metal being protected.

✅ Before You Answer

• Verify which surfaces are exposed to seawater/cooling water versus sealed refrigerant. • Check where sacrificial anodes must be electrically connected to the metal they protect—would that be inside strainers, on refrigerant circuits, or where seawater flows? • Confirm which component would actually corrode quickly without protection in a shell-and-tube seawater-cooled condenser.