When checking zinc plates, or pencil zincs...

Question 1 / 270705eccef9dbacbc34ba4d460b3

Question 1 of 270705eccef9dbacbc34ba4d460b3

When checking zinc plates, or pencil zincs in the refrigerating system condenser, what should you do?

Question 1 of 27070

When checking zinc plates, or pencil zincs in the refrigerating system condenser, what should you do?

🔍 Key Concepts

• Purpose of zinc anodes (sacrificial anodes) in condensers and seawater systems • How much deterioration of a sacrificial anode is typically allowed before replacement in marine practice • Why painting or insulating zincs would affect their ability to work

💭 Think About

• What is the job of zinc plates or pencil zincs in a condenser that uses seawater? How do they protect the metal around them? • If zinc is supposed to corrode instead of the equipment, what condition would tell you it has done its job and is no longer effective enough? • Would you ever want to reduce the electrical/metallic contact between the zinc and the metal it protects, and what would painting or heavy filing do to that contact?

✅ Before You Answer

• Confirm the basic principle of sacrificial anodes: which metal is supposed to corrode first. • Think about standard marine maintenance practice: at roughly what percentage of material loss are anodes commonly renewed? • Verify that good metallic contact with seawater and the protected metal is required for the zinc to function as intended.

Question 1 of 27070

When checking zinc plates, or pencil zincs in the refrigerating system condenser, what should you do?

file the plates to change the negative value

replace the zincs if deteriorated by 50%

renew the plates at each inspection

paint and insulate the plates to prevent corrosion

Question 1 / 270705eccef9dbacbc34ba4d460b3

Question 1 of 270705eccef9dbacbc34ba4d460b3

When checking zinc plates, or pencil zincs in the refrigerating system condenser, what should you do?

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Question 1 of 27070

When checking zinc plates, or pencil zincs in the refrigerating system condenser, what should you do?