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Old 01-31-2003, 02:55 PM   #1
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Removing Anodization

Anyone know the steps in order to remove the anodization off of aluminum. About all I know is you need "easy-off" the oven cleaner but how long do you let it set, what do you use to take off the easy-off(water?). Any help would be greatly appreciated.
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Old 01-31-2003, 03:07 PM   #2
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why would you want to do that if your looking to make somthing shiny just get a very corse polish for metals like brasso and that sort of thing then pull out your demmel (or if you don't have one a drill put on your buffer bit and spin away guy's like doing this on nitro's it's also prety good for breaking in bushings.
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Old 01-31-2003, 03:14 PM   #3
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perhaps easy off, but i use a lye solution. it's a chemical to clean out drains. it's very aggressive. i mix a teaspoon or so into a 1/2 filled coffee mug and watch it fizz and get warm, then drop in my aluminum and stir as the solution turns the color of the anodizing. soon i have silver or greyish parts! they need rubbed or polished afterwards, but it sure beats sanding off the anodizing.

it's available at supermarkets. also, be careful not to breath in the fumes and don't let it sit on your skin too long. not too healthy.

that's one way.
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Old 01-31-2003, 11:22 PM   #4
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i personally used Hot hydrochloric acid to remove my anodize. then polished the parts with my dremel. the acid only took 2 seconds to remove the anodize.........but if you cant find someone with access to the (i.e. machine houses that do plating), household oven cleaner works.
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Old 01-31-2003, 11:31 PM   #5
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The best way I have found is a bead blaster, but not everyone has one.
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Old 02-01-2003, 12:09 AM   #6
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Use the stinky kind of Easy Off, not the no smell one. The time it takes depends. You need to keep an eye on the part. I'd look every couple minutes. Once the color is gone take it out and wash with water. The part will look dark. You need to polish it out. You might need to wet sand with 400 then 600 then 1000 grit sand paper and finally some aluminum polish like Mother's mag polish.

If you leave the part in too long it'll eat away the aluminum!
Do it in a well ventilated (outside) area!

Have fun.

Last edited by Sydewynder; 02-01-2003 at 12:12 AM.
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Old 02-01-2003, 12:12 AM   #7
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Originally posted by CGR
The best way I have found is a bead blaster, but not everyone has one.
Agreed! I like the finish the glass bead leave on the AL. I did a tuned pipe a while back.

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Old 02-01-2003, 12:23 AM   #8
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just remember that oven cleaner will change your tolerances a lil if it a part with a tight clearence i have done many parts all different ways and the tolerances always change a lil ....
i have had certain types of degreasers that would take off regular types of decorative anodsing just experiment with them the strongest were the ones i found in dollar stores ..go figure..

the best method of polishing afterwards is the bricks found at a few stores and added to a fast wheel on a larger style bench grinder.... i know that sears sells the bricks for polishing i have never found anything better .............mothers polish and a dremel is a lot of work i promise lol
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Old 02-01-2003, 11:37 AM   #9
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I anodized a piece of aluminum for a chemistry project. I removed the anodizing with a wire brush on a dremel. Didnt take long at all.

Heres something Ive been wondering about for a while, how would I remove anodizing from Threaded shocks? I dont think easy off would work, because you have to sand it. I suppose I would have to use HCl? What concentration?
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