Imma keep it real with ya, chief. It's going to take a lot of effort, but you MAY be able to rescue the card. White vinegar, a lot of scrubbing, and a fiberglass pen. The. You've gotta pull the messed up chip, fix up the pads underneath with more scrubbing and that fiberglass pen to get down to metal to tin up, or reveal the metal is gone. Then you can either try cleaning up the legs of those chips, but it's almost a certainty that the corrosion has entered the plastic package and destroyed them. So you're left with a problem wrecked board, because if you had the skills to do it, you wouldn't be asking here, and a handful of dubious chips. I do this a lot, and it would take me hours upon hours to exhume that corpse.