So, should us aluminum hull types in fresh water be using the magnesium anodes instead of the zinc anodes? I checked a couple of marine catalogs and couldn't find the egg shaped ones for my prop shafts or the disc shaped ones for my trim tabs and rudders...any suggestions?
Hmmm,..., magnesium - pretty volatile stuff. I use Sealloy strips made out of low-grade aluminum (available from Marinette Yachts - ask for John Althouse) on mine aluminum hull situated in fresh water. Work great. Start slow!
Cool! Will give that a shot. Thanks Eric, and I will try to get some pics on soooon...yea, yea, I know I've been saying that for months...(but fooling with pics on computers is winter work, isn't it?)
Aluminum is amphortoric and will corrode when it is under-protected and will corrode if over-protected. The use of magnesium anodes can lead to over protection. Mil-spec anodes zinc anodes are capable of protecting aluminum in fresh or salt water. The mil-spec zinc contains a half a percent of magnesium. The magnesium enures a burn rate on the zinc regardless of the demand to do work.
Most all of your store bought zincs are mil-spec with the exception of the ElectroGuard zincs. ElectroGuard zinc and Electro Guard corrosion control systems are not the same company. SeaShield, & Martyr manufacture zincs in all shapes sizes and mounting configurations. ElectroGuard corrosion control systems manufature a monitor only device that will greatly enhance your system. It is constant reading and will alert you to zinc condition and stray electrical current.
I have store bought zincs, they are not corroding as they should, I am in fresh water, which I think is the problem. I contacted the folks with Marinette Yachts and will go with the sea-alloy strips, what Eric did.
I have store bought zincs, they are not corroding as they should, I am in fresh water, which I think is the problem. I contacted the folks with Marinette Yachts and will go with the sea-alloy strips, what Eric did.
Did you go with the sea-alloy strips and if you did how do you like them?
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