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Old 08-22-2012, 03:23 AM #1
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Default De-anodizing fail

Well I was looking at faster ways to de-anodize , other then spending a hour with a dremel. Through a few google searches I saw a few things people said worked, oven cleaner, toilet cleaner, drain cleaner ect. So I tried toilet cleaner and it didn't work so well. Not sure why though maybe the light wasn't aluminum? Or maybe it was just regular paint? Idk...but now I have to buy another host GRRR



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Old 08-22-2012, 03:53 AM #2
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Default Re: De-anodizing fail

WOOW, That's pretty freaky, maybe you used a highly acidic product, you sure that piece isn't plastic?
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Old 08-22-2012, 03:56 AM #3
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Default Re: De-anodizing fail

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Originally Posted by daawood123 View Post
WOOW, That's pretty freaky, maybe you used a highly acidic product, you sure that piece isn't plastic?
100% sure it wasn't plastic. It was definitely some sort of metal. It ate right through the threads, and It only took maybe 5-10minutes...
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Old 08-22-2012, 04:00 AM #4
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Default Re: De-anodizing fail

Look on the bright side, atleast you got the de-anodizing bit done

On a more serious note, you shouldn't have used toilet cleaner, search google for a proper de-anodizer liquid, to prevent this from happening
again.

Also, are you 100% sure the threads aren't plastic?
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Old 08-22-2012, 04:04 AM #5
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Default Re: De-anodizing fail

Removing anodizing from aluminum
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Old 08-22-2012, 04:10 AM #6
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Default Re: De-anodizing fail

Use Draino Max Gel. Works great!!!
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Old 08-22-2012, 08:50 AM #7
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Default Re: De-anodizing fail

Quote:
Originally Posted by daawood123 View Post
Also, are you 100% sure the threads aren't plastic?
For sure they were aluminum.


And yea It was my own fault for being impatient. I should of got something made for this, but wanted to try what I had.
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Old 08-22-2012, 09:18 AM #8
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Default Re: De-anodizing fail

Toilet cleaner that eats through alumunium, thats a new one
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Old 08-22-2012, 09:59 PM #9
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Default Re: De-anodizing fail

The cleaner probably had sodium hydroxide in it. This is used, properly diluted, as a wash or light etch before andozing. It can also be used to de-anodize, but if too concentrated, it will dissolve the aluminum very rapidly. This is wh yyour threads vanished. A 1/5 strength solution of phosphoric acid used very hot can be used. Also used is a chromic acid and phosphoric acid mix, again used hot. For some surfaces, fine sandblasting is an option.
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Old 08-23-2012, 10:29 AM #10
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Default Re: De-anodizing fail

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Originally Posted by billg519 View Post
The cleaner probably had sodium hydroxide in it. This is used, properly diluted, as a wash or light etch before andozing. It can also be used to de-anodize, but if too concentrated, it will dissolve the aluminum very rapidly. This is wh yyour threads vanished. A 1/5 strength solution of phosphoric acid used very hot can be used. Also used is a chromic acid and phosphoric acid mix, again used hot. For some surfaces, fine sandblasting is an option.
Thanks, yea I read that Phosphoric Acid can be used around 200 degrees from 5-10 minutes. Also that it should leave a decent finish, as some will leave a rough finish I guess harsher stuff. I see 85% food grade Phosphoric Acid, I guess I'll try it out
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