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Weld Aged Naval Bronze

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HumbleServant

HumbleServant

Mechanical
Nov 1, 2007
1
I'm considering welding a naval bronze strut on a 40-year-old sailboat. Probably a quarter of that time it has been in salt water continuously. Would welding be recommended or would there be inbrittlement? I am concerned about migration of some of the constituents over time.
Dan
dkidd@fairpoint.net
 
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If it's brass you may have experienced dezincification. Bronze, on the other hand, has very little zinc and it's properties should not change over time. Bronzes are usually readily weldable.
 
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In either case you would be grinding to sound clean metal before welding so it should work fine.
Just remember, clean, clean, clean.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed
 
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I am finding "leaded red brass" , or "ounce metal" , 85-5-5-5, for Navel bronze. Copper Development Assn ( 1978) , says do not weld; use brazing. Dezincification occurs in high zinc alloys like Admiralty metal ( 69-30-1). De-nickelification occurs rarely in nickel aluminum bronze ( very different from ounce metal). So it is fairly safe to say you do not have any elemental leaching.
 
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Just because dezincification can happen does not mean it will happen

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
 
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