PCM Zinc Anode for Heat ExchangerProtect your marine engines cooling system with the PCM Zinc Anode for Heat Exchangers. This sacrificial anode is designed to help reduce galvanic corrosion inside the heat exchanger by corroding firsthelping extend the life of critical cooling components and supporting more reliable engine operation in harsh saltwater and brackish water environments. Replacing a worn zinc anode is a simple, cost effective maintenance step that can help prevent