I dropped my camera in the ocean (Don't care about the camera and shame on me). I'm trying to get a scuba diver now. It's been in there for 24 hours, as of this post.
Thanks to everyone who responded.
I hired a scuba diver and he found the camera (almost one week to the day in 20' of water). He rinsed the SD card for me before I picked it up.
Put SD card I my laptop and it's like it never happened.
My photos have been rescued.
The chip is not likely to get damaged easily but the contacts and connections will corrode: apart from this kind of corrosion being able to damage the chip mechanically eventually, having to disassemble stuff (once the connections are broken) will end up making professional recovery a lot more expensive. My personal best guess would be to drop the card in copious amounts of pure ethyl alcohol (should be harmless for the plastics) for a day to get the salt out (probably change the solution a few times), then dry for two days and then try the card. However, I am not sure about this being the best solvent. With distilled water as solvent, I'd fear more corrosion while the salt is not yet out. But I have no experience with salt water damage.
The most frequent cause of terminal liquid damage is electrolysis by not waiting for everything to dry completely before attempting to access. Avoid that mistake.
Also don't do anything with that card (once you can access it or parts) but create a lowlevel copy of it. If you don't know how to do this, get a hold of someone who does.
Good luck. And in future, learn to back up. Memory cards die eventually, and due to their wear balancing controller, the failure mode can be pretty catastrophic when they reach end of life.