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post #19 of Old 04-24-2013
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Re: Using Bottom Paint on Brass Propeller

Why are props not made from silicon bronze?

Price looks to be about the same and then there would not be the concern of getting dezincified and destroyed.

Silicon Bronze C65500 is comprised of 95% Copper, with 4% Silicon and 1% Manganese to combine high strength and good hot and cold formability with excellent welding characteristics. Additionally, 65500 exhibits good resistance to corrosion by brine and sulfite solutions, non-oxidizing inorganic acids, alkalis, and other mixtures. The mechanical and chemical properties of Silicon Bronze 65500 are similar to those of stainless steels.

Silicon Bronzes are commonly used in the pump & valve component, fastener, piston ring, and marine hardware industries.
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