>From what I know, the aluminium is for brackish water and magnesium is for >fresh.
To answer the original question (Pete's), you cannot have a long lasting anode and a good protection at the same time, as the whole point of protection is that it won't last too long. Pick the compromise that is best for your case. Marek 1994 #122 "Legato" Ottawa, ON In fresh water, when it floats (currently on the hard) From: CnC-List On Behalf Of Bill Coleman via CnC-List Sent: 20 March, 2020 18:39 To: cnc-list@cnc-list.com Cc: Bill Coleman <colt...@gmail.com> Subject: Re: Stus-List Which metal should I use as a sacrificial anode? Oh boy, this will be a lengthy discussion! I believe they recommend Aluminum for fresh water. I tried it once, and ended up with all kinds of unexplained *stuff* all over my shaft. I went back to zinc. Bill Coleman Erie PA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of kelly petew via CnC-List Sent: Friday, March 20, 2020 6:02 PM To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: kelly petew Subject: Stus-List Which metal should I use as a sacrificial anode? Throughout my boating "career", I have also used ZINC for protecting prop and shaft. I sail the Virginia portion of Chesapeake Bay where the further north you go, the more brackish the water becomes. In looking to order anodes through Defender, I noticed their comment about ALUMINUM being longer lasting in salt and brackish waters [than ZINC]. I'd like to get both max protection AND max life out of my anodes. For those who sail in salty or brackish waters, which metal are you all using, and what's been the longevity? Fair Winds, Pete W. Siren Song '91 C&C30-2 Deltaville, Va.
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