You must have used duracell battery. Lost a few remotes because of duracell. I took a pledge never to buy a duracell again.
Open the remote and see if the copper traces can be repaired. You can post the photo of the PCB. The ic in all probability will be fine, it will be the copper traces that will corrode with the leak.
I have repaired remotes and calculators by using a lead pencil and repeatedly drawing over the traces and bit of soldering