Salt water and 12v car batteries - fire?

[rallycross]

Don’t see how this would cause a fire - does salt water risk a battery fire if a car is parked up?

https://youtu.be/B0mSPKvor2g

Fast forward 5m45 secs in

Would have been more worried about my pride and joy being strapped to the top of an ocean cargo vessel with no protection - would turn to rust before not long!

[MisterBigglesworth]

Salt is conductive, so if salt water covers batteries then as the water evaporates it can leave a conductive film bridge across the terminals that can cause them to short, overheat and then catch fire.

[BertBert]

MisterBigglesworth said:

Salt is conductive, so if salt water covers batteries then as the water evaporates it can leave a conductive film bridge across the terminals that can cause them to short, overheat and then catch fire.

I think you'll find that salt is actually not conductive.

ETA though salt water is much more conductive than fresh water.

So sadly only 2/10 for the explanation

Edited by BertBert on Saturday 10th December 05:42