Caldwell Casting/Performance Metals HC3A Aluminum Hull Anode

The Performance Metals HC3A is a premium aluminum hull anode designed to provide superior corrosion protection for boats and marine vessels. Manufactured to military specification MIL-DTL 24779, this Navalloy® aluminum anode is suitable for use in all water types—salt, brackish, or fresh. This versatile anode serves as a direct replacement for ZHC-3 anodes and is commonly used as a transom anode on many yachts and boats.

Key Features:

• Exclusive, patented "red spot" wear indicator for easy visual monitoring of anode condition
• Made from Navalloy® aluminum alloy containing approximately 5% zinc and trace indium to prevent oxide layer buildup
• Cast and assembled in Maryland, USA by Caldwell Casting, the manufacturing base for Performance Metals
• Bolt-on design with slotted mounting holes for secure installation
• Lightweight yet effective protection—0.9 lbs of aluminum provides equivalent protection to 2.6 lbs of zinc

This sacrificial anode protects underwater metal components from galvanic corrosion by corroding preferentially, preserving valuable boat hardware, propellers, shafts, and hull fittings. The convenient wear indicator allows boaters to monitor anode condition and plan replacement before protection is compromised, ensuring continuous corrosion defense in any marine environment.