Sea Salt Water Damage, Denatured Alcohol?

My phone was submerged in the Atlantic Ocean for about 5 minutes, and it powered on at first, but when it dried and we tried to charge it, it got exceptionally hot. We have not got it to power in since. Taking off the screen revealed accumulations of salt, but no other internal damages, until my brother accidentally severed the connecting cable from the front facing camera to the rest of the phone.

I was wondering if soaking it in denatured alcohol would do any good, and if I should reattach the screen and how long I should soak it etc.

The goal is to obtain a usb connection so I can use a data recovery application to get my pictures off of it, so if anyone else has alternatives measures, let me know. Thanks!