Guru
Joined: 04/10/2019
Location: AustraliaPosts: 678
| Posted: 06:24am 16 Oct 2024 |
Aaron, stainless steel (any grade) and aluminium are a *very* bad combination. I know this because for many years I had a sailboat and If I did not insulate these two from each other they would corrode (electrolysis).
Actually, stainless only stays so in the presence of oxygen. If you place it in a sealed space with some kind of electrolyte it will suffer what's called crevice corrosion. The picture of your bolts & nuts show evidence of that.
The big (200Ah) lithium cell I have do use stainless bolts for the connection but these go into a blind hole, no access to the battery inside.
Negative terminal bolt screws into a copper electrode connection, the positive into an alumunium electrode connection, both are blind holes.