Post Weld Cleaning of Aluminium

[gibsoni]

Hi Guys,

I am sure this is a simple question for those in the know.

I am doing a one off job that requires mig welding of aluminium. The welding is fine but I want to clean them up, but mostly the black soot like surface that surrounds them.

I know I can wire brush it with a hand stainless steel brush.

I have found an ultra fine (0.003" wire) wire brush for the bench grinder and that seems to work well.

What are some smarter options for cleaning? Is there a solution I make up to dip them in?

This is aluminium extrusion and is 32x32 angle, 3mm thick, welded into 500mm squares.

Thanks for being such a helpful community.

Regards, Iain.

 

[unclesyd]

On a one off job You should visit one of the auto parts stores to see what is available. The bigger stores should have an alkali or acid cleaner that will handle diesel tracking. Some of the Aluminum wheel cleaners will do the job. Your welding consumables supplier should have similar product.

If you need a brightening solution I would look to Alumi-Brite product. If you have to use this type product use all the recommended precautions as most contain Hydrofluoric Acid.

 

[coatingengineer]

Hello, Gibsoni. Any alkaline soap/detergent with a pH of 10-12 should work very well. Keep in mind cleaning efficacy is due to actual dissolution of your aluminum. So, you'll need to clean fast, monitor closely. Best wishes.

William Gunnar

http://www.IndustrialCoatingsWorld.com