If you have top post lead acid batteries, try using a thin
felt pad washer or battery protector. The Permatex battery protector spray that Mike posted,looks like a good finishing product as well.
Pico No 868 | Washers | Pico of Canada Ltd.
The felt pads really help a lot. I am sure Autozone and similar places sell them.
I use them on my 4x4 with a lead acid battery, and no corrosion problems since.
With the Buick'* fully sealed AGM Odyssey battery, you never have to worry about corrosion problems.
I know AGM'* are $$ but when the 4x4 lead acid quits, I will be replacing it with another Odyssey.