'07 Altima - white corrosion on battery case only?

[Towncivilian]

I was looking over my father's '07 Altima 2.5L and noticed some white corrosion looking stuff on the battery case near the bracket, but the terminals are free of corrosion.

Why would the bracket start to corrode but not the terminals? Is it overtightened? It hasn't been touched since the dealer replaced the battery about two years ago.

Should I remove the bracket, clean the corrosion, and replace it with a new bracket and nuts and tighten to torque spec (assuming there is one)? Or since there is still warranty remaining, should I have the dealer take a look at it?

 

[DrDusty86]

dissimilar materials used. it happens quite often in Japanese car makes. My stepmom's 2008 Honda minivan had first just terminal grease which it STILL corroded, so felt pads were added, then it gets Permitex spray every month. It is THAT bad. My Escort...noda..nothing...import....eehhh nevermind

 

[Donald]

Clean with baking soda and see if it comes back. Always possible some battery acid got spilled. Maybe loosen the clamp to get under it.

I do not see dissimilar metals in the battery clamp. Its steel as are the threaded rods, washers, nuts.

Dissimilar metals do have galvanic corrosion where they touch, but that is not the case here.

If it comes back a second time, remove the clamp, soak in baking soda, wire brush, prime, and top coat with some type of waxy undercoating or metal protector. Amsoil makes a heavy duty metal protector that would be fine. Then grease the rods around the clamp and where the nuts go.

 

[LeakySeals]

Take off and clean the battery holding bar. Add some rubber between it and the case. Don't over tighten that bar, can cause issues. Clean the caps, may be a bad seal. if it comes back look towards alternator.

 

[NHGUY]

Spray it down with Fluid Film.The corrosion will never come back,because FF stays wet.It wont evaporate.

 

[tommygunn]

Or something I've tried is clean it all up and coat everything with a nice thick layer of Vaseline or petroleum jelly.

Stuff keeps everything off the metal, so no more corrosion, but I did that with a cheap old car that had a massive corrosion problem.

Fixed it though.