Has anyone used, or heard much about, Navalloy anodes as a replacement for the usual zincs? Advantages, or not. Price differences. Since that time will be upon us soon, I thought I'd shop around a bit and see if technology might have changed in our favor. Thanks
Anodes
- Thread starter chc
- Start date
- Joined
- Jan 1, 2000
- RO Number
- 385
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- 2,888
Basically a version of the Mercruiser aluminum anode and yes they are preferable, especially for stern drives. Mercruiser says to use them over traditional zinc IN SALT WATER ONLY. Use magnesium in fresh.
Most people don't realize that anodes can become inactive especially in mineral rich waters where disolved minerals will infilterate the metal and reder the anode inactive. Visual inspection will not reveal an inactive anode. Only a hull potential check will. You can sometimes sand the anode and get it going again, but replacement is the only real option. Zincs are more prone to mineral compromise than aluminum in salt water. That is not to say Aluminium cannot be compromised but they are less prone than zinc.
Most people don't realize that anodes can become inactive especially in mineral rich waters where disolved minerals will infilterate the metal and reder the anode inactive. Visual inspection will not reveal an inactive anode. Only a hull potential check will. You can sometimes sand the anode and get it going again, but replacement is the only real option. Zincs are more prone to mineral compromise than aluminum in salt water. That is not to say Aluminium cannot be compromised but they are less prone than zinc.
- Joined
- Jan 1, 2000
- RO Number
- 1702
- Messages
- 1,621
This reminds me that I need to change from my saltwater florida zincs to fresh-brackish water anodes