Ship hull sheathing or house flashing? GO!

[FloridaSon]

Found in treasure coast about 10 inches down after a couple days high surf. Rang up high and solid. Non magnetic non ferrous. Does have a slight greenish color in places. The round head seems to be a rivet.

 

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[A2coins]

That could be almost anything pretty weathered...

 

[A2coins]

Welcome also I wish I was detecting the Treasure coast. From MI Tommy

 

[ANTIQUARIAN]

Kind of looks like zinc?
Dave

"Steel/zinc use in ship building... if steel is used, a zinc layer is often applied to coat the entire hull. Steel is either used in sheet or alternatively, plate for all-metal hulls or for isolated structural members. It is strong, but heavy. It is generally about 30% heavier than aluminum and somewhat heavier than polyester. The material rusts unless protected from water. Modern steel components are welded or bolted together. If steel is used, a zinc layer is often applied to coat the entire hull. It is applied after sandblasting and before painting. Optionally, the covering with the zinc layer may be left out, but it is generally not recommended. Zinc anodes also need to be placed on the ship's hull. Until the mid-1900s, steel sheets were riveted together."

 

[FloridaSon]

Thanks everyone. I jumped the gun on this one. After a lot of reading and looking at it I think it is a piece from an old WEII era aircraft or something. It has a rivet that is flush on one side. It can’t be ship hull plating. Florida had Army Air Corp bases all along the coast as well as the Joint Army Navy Amphib base (now the National SEAL Museaum) Regards!