Berylium Copper in Seawater 1

[deaconp]

A quick Question can anybody tell me if the use of Berylium Copper is a suitable material for contact with seawater in application as an ROV indicator rod.
There are no applications of loads or forces just a position indicator rod Made from Berylium Copper surrounded by seawater

Cheers

 

[bilge]

The Cu/Be should be satisfactory. Alloy C82400 (98Cu-1.7Be-0.3C0)is used in submarine cable repeater systems and hydrophones.

But if there are no forces acting on the material, why go to the expense of using such a high-strength, heat-treated alloy when Admiralty Metal would likely work as well.

One problem with copper alloys in sea water is erosion corrosion. The ususal answer to this problem where it arises is to go to a cupro-nickel, e.g., C71500 (Cu- 30Ni-pinch of FE) which has excellent resistance up to a fluid flow of 4.5 m/s.