Should be:

SaltWater + Electronics =

In know, I have the parts left over.

Mine still boots up and even charges,
but the water hosed the display and
when I got the metal screenlids off various locations
(including the wifi circuitry) I could see that all was lost.
It was dirty saltwater and exceedingly difficult to even get
the worst stuff out. The only way to even try is immersion
in distilled water and an alcohol rinse,
but even then residue remains to wreak havoc.
(Note - you need to remove the camera module and the display
as these have bits that simply cannot be cleaned)

The best you can hope for really is if the screen and camera
still work then they are ready spares for a replacement unit.

Saltwater on the Motherboard inside the cages is a terminal event.

My next test unit I will disassemble and properly waterproof.