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Old 26th May 2006, 11:00 PM   #1
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Default cleaning aluminum

I need to clean some aluminum and need some suggestion the easier the better


Thanks
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Old 26th May 2006, 11:03 PM   #2
poobah is offline poobah  United States
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Can you elaborate? a bit?
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Old 26th May 2006, 11:48 PM   #3
bulgin is offline bulgin  South Africa
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Default Cleaning Aluminium

Hi

Depending what it is you want to clean, you can give it a 'chemical polish' by dipping whatever it is in phosphoric acid at 100degrees centigrade.

Disclaimer: Entirely at your own risk! This stuff is dangerous in many ways and corrodes amost anything. Wear protective clothing and breathing apparatus + rubber gloves. Ensure good ventilation.

This method is used prior to anodising.

If you're crazy enough to try this, be very careful and heed the disclaimer.

bulgin
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Old 26th May 2006, 11:49 PM   #4
SY is offline SY  United States
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This is goggles and heavy rubber gloves stuff, lots of ventilation. It should NOT be done by anyone without experience handling corrosives!
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Old 26th May 2006, 11:55 PM   #5
infinia is offline infinia  United States
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Yikes you guys are hcore around here. Must be another way to "do it".
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Old 27th May 2006, 02:49 AM   #6
poobah is offline poobah  United States
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Good ole' Coca Cola is a milder way of getting at some phosphoric acid. It WORKS on aluminum.

Old college trick: never pour half-finished Coke down the drain; put it in the toilet and let it sit. Cuts down on maintenance!

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Old 27th May 2006, 03:14 AM   #7
infinia is offline infinia  United States
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Castrol "Super Clean" followed with MAAS metal polish and a little elbow grease.
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Old 27th May 2006, 01:06 PM   #8
cpemma is offline cpemma  United Kingdom
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Stewing rhubarb in an aluminium pan leaves it very clean. I've used it to clean up the pressure cooker, though it may be wise to discard the cooked fruit.
Quote:
http://www.alzscot.org/pages/info/aluminium.htm
Rhubarb cooked in an uncoated aluminium pan or pressure cooker can, for example, pick up 4mg of aluminium per 100g serving.
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Old 1st June 2006, 05:42 AM   #9
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bulgin wrote
Quote:
Depending what it is you want to clean, you can give it a 'chemical polish' by dipping whatever it is in phosphoric acid at 100degrees centigrade.
How do u clean the aluminium that suffers from corrosion due to this acid.
I can't wash some of the parts as they are parts of a sample handler in a mass spectrometer.
Any chemical that will stop/revert the reaction.

Thanks in advance

Gajanan Phadte
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Old 1st June 2006, 07:00 AM   #10
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Any acid will attack the oxide layer changing the shape of the metal. as soon as the clean metal comes into contact with air it will start to oxidise this will takes ~2s.

So jumping back, What do you want to clean and why?
What do wish to clean off it?

How did it get dirty in the first place.
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