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Old 10-13-2013, 11:30 PM
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claymore claymore is offline
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While working on my airbox installing new wingnuts and bolts to replace the screws that held the lid on I happened to look down alongside the battery and found................. a bunch of corrosion popping up on the metal battery tray.

Here are some shots of the new convenient tiny wingnuts and brass bolts.

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And now the ugly corrosion after removing the battery you can see how far it has spread.

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EEEEWWWWWW a bit more.

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While I was looking at the damage I spotted these holes in the inner fender. don't know if they contributed to the water but I blocked them off with a piece of foil tape.

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So I broke out my trusty brass wire brush and scotchbrite and cleaned all the corrosion off.

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got out my black spary paint and gave the cleaned up area a few heavy coats of paint. when the paint had dried overnight a coated the whole tray with a light coat of universal grease to help ward off any more corrosion incidents.

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Finished by washing the battery, cleaning the terminals and posts, topping off the battery water, and re-installing everything.

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Going to be keep an eye on the area in the future to make sure it is not getting corroded again.
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Old 12-05-2013, 09:03 AM
handy handy is offline
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Need to isolate battery, and find where the acid is coming from, I found on a previous vehicle battery would only leak when it was topped up with water. Seam near top was broken but invisible to eye on casual inspection.
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Old 12-05-2013, 09:48 AM
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I'm pretty sure mine is coming from water collecting when I wash the car as I have removed the rear rubber seal from the back of the hood.

And a bit from the battery caps as it's not a sealed type. I can see a bit of moisture around the top of the battery where the built in carrying handle pops into place I pretty sure it's from the caps breathing out because I don't drive it every day and when I do drive it it needs to be charged.
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Old 12-05-2013, 10:25 AM
Waldo Waldo is offline
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The repair looks really good!

It's to late now, but it sure would have been a good idea to neutralize the acid residue with a solution of baking soda and water before painting it. It's not coming out of the pores of the metal very easily.

My airplane mechanic topped off my aviation battery while it was in the very cool hangar. After the plane was parked out on the ramp, it began to warm up and the acid overflowed. Somehow, it leaked out of the battery box and began eating away at the aluminum skin of my plane. Thinking fast, he rinsed it with a water hose and then mixed up baking soda and water, poured it on, and haven't had a problem with the aluminum since. Needless to say, I use a sealed aviation battery now.
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