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Aluminium on Brass Wheels

Aluminium deposit on brass wheels

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Patrick Rundle 1	22/06/2020 16:12:01
2 forum posts	I have been plagued with a problem for some time and unable to find a solution. I have cut some brass wheels using an aluminium backing disk. On some of the wheels aluminium is transferred onto the brass during the cutting process. I have yet to find a way of dissolving aluminium and not the brass - the best so far is Drain Cleaner which bubbles for some time, doesn't seem to attack the brass, but does not remove all the aluminium. Can anyone suggest a solution for this problem? Thanks Pat
Andrew Tinsley	22/06/2020 16:24:58
1817 forum posts 2 photos	An easy solution is to dunk the wheel in an alkali solution. Sodium hydroxide solution is probably the best , but any alkali will do. Sodium carbonate solution (washing soda) or sodium bicarbonate solution should do the job, but more slowly. Andrew.
Patrick Rundle 1	22/06/2020 16:38:35
2 forum posts	Thanks for that. I've checked the contents of the HG liquid drain unblocker I used and the active ingredient is sodium hydroxide. As I said it bubbles for some time so is probably dissolving most of the aluminium. The surface left when bubbling stops still looks aluminium coloured rather than brass coloured. Pat

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