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topic 33131

Best Cost/Least Salt Water Corrosive Metal: Stainless or Al-Br ?

A discussion started in 2004 and continuing through 2020 so far.
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Q. Hey Folks,

Developing a light that will be housed in a metal casing under pleasure boats, worst case 4 feet deep, 4" in diameter/5" deep.

Do not have a need for the metal housing to dissipate heat from the light source, but would like the least corrisive/best cost for commercail apps. available.

I have seen 316 Stainless and also a material called Bronze AB-2.

Any suggestions?

Thank you!

Bruce Louzon
Industrial - Tampa, FL, USA


A. There is also an alloy called Naval Bronze (or is it naval brass?). I think you should review its properties and cost.

Guillermo Marrufo
Monterrey, NL, Mexico

Chrome and gold-tone plating on brass

August 5, 2020 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Would like to know what brass alloy would be suited for chrome and gold (not real gold but bright shiny gold plating) plating with a maritime exposure. Understand salt water gets everything in the end. Thanks.

Chuck Howard
- Cuero, Texas

August 2020

A. Hi Chuck. We added your inquiry to an earlier similar thread. If price is no object you'd probably actually be best off using 316SS and electropolishing it, and it would be indistinguishable from chrome plating but more durable.

But naval brass has long been known for maritime use and is relatively inexpensive, so I think Guillermo's advice is good.

Luck & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET - Pine Beach, New Jersey
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