Aluminum still corrodes? Um, go read. It'll form a thin layer of whitish aluminum ozide a few molecules thick, cutting it off from the air and totally preventing further oxidation. Aluminum does not corrode.
battery tray - upgrade aft vs stock
- Thread starter S&S1stCruzer
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Oh I have no clue.I have never seen it corrode personally. I know I have seen Stainless rust in half at plants ...but I am sure that was cheap s*** .
NLXTACY
Wits' End
Well wait a minute. Yes it does. Especially if you have it mounted on steel and there is water involved or even low level electricity, I'm talking even static. It creates electrolysis which will basically means the process takes an electron from the weaker metal and add it to the stronger one. Effectively it will corrode the aluminum. BUT, putting a rubber/plastic barrier solves this issue. I would rock the aluminum so long as it was properly mounted because how much flowing water and flowing electricity does it actually get?
Do you understand that the process would take hundreds of years for this level of electrolysis to be visible on this kind of gauge metal? You'd go through 20 steel trays in that time. And that would be with a constant water presence and a constant level of electrical current. It is a non-issue, especially if you used little gaskets between the metals, as you mention. BTW, you could also use thick ABS instead.
NLXTACY
Wits' End
hehe, it doesn't take hundreds of years. I've rebuilt a few thousand engines in a previous life and I've seen what happens when you have an aluminum head or all aluminum block and you don't have proper grounding or some type of sacrificial metal like lead involved. It pits the aluminum really really bad. That doesn't take very much time. But whatever, we are splitting hairs at this point.
ntsqd
technerd
I have read, I've also witnessed and had to repair corroded aluminum. What you're saying is true in normal atmospheric conditions as a stand-alone item. Bolt aluminum to steel and you set up a galvanic battery once a little ambient moisture gets into the gap. Add in some minor sulphuric acid contamination and you no longer have a normal atmospheric condition, you have a hostile and aggressive corroding environment.
Aluminum alloys corrode faster than does pure aluminum, but pure aluminum isn't terribly strong. Some aircraft use "Al-Clad" which is an aluminum alloy with a thin coating of pure aluminum for corrosion protection.
Besides, I prefer Stainless over aluminum.
Not to continue a non-debate or split hairs further, but there should always be a gasket there anyhow, even with the stock tray (though there wasn't one there from the factory), as batteries don't like vibration particularly well and the gaskets act to an extent as a dampener, let alone a separator for the issue we're discussing. Do that and the aluminum corrosion issue is 100% moot.
I don't see how a .20" coat of rubber is going to dampen battery vibration.
I sanded down my battery tray and primered it then used the rubberized spray. We'll see how long it lasts.
I sanded down my battery tray and primered it then used the rubberized spray. We'll see how long it lasts.
