Suitability of piezoelectric materials in water

[SalfordPhysics]

The title pretty much says it all.
I want to know if any piezoelectric materials can fully function in constant contact with water. If so, how long a lifetime could be expected and would there be any polluting to the water?

Thanks

 

[gjm123]

The piezoelectric material is usually embedded in waterproof material that allows the sound waves to pass to and from the water.

This is how it in done in transducers for depth finders and fish finders.