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Posted by Sherman in Idaho [24.32.202.166] on Friday, January 18, 2013 at 00:06:30 :
In Reply to: Re: Sacraficial Anode in Radiator or Engine? posted by gmharris [71.105.35.169] on Thursday, January 17, 2013 at 23:50:20 :
Here's where we get into the perpetual problem of the naming of copper alloys. For the most part, the way most people use the terms, "bronze" means a copper/tin alloy and "brass" means a copper/zinc alloy. The trouble is there are a huge number of alloys with all sorts of conventional names, and some "brasses" contain tin and some "bronzes" contain zinc. Even color doesn't tell you much because there are red, white, and yellow bronzes as well as "bronze" colored ones. But if we stick with the usual meanings, only bronze is fit to use in exposure to salt water. Tin costs a lot more than zinc, so bronze costs a lot more than brass.
Clearly if the saltwater side contains no zinc-bearing "brass", a zinc anode will suffice to protect it, although copper/tin bronze survives very well in salt water with no protection.
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