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PostPosted: Mon Aug 12, 2013 8:48 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4861
Location: Herts UK
pretty sure I read about it here - there was a series of posts on how to remove steel part e.g. a broken steel bolt from aluminium alloy by chemically dissolving it

anyone remember this?
what was the chemical involved? and did it need electricityy?

PostPosted: Tue Aug 13, 2013 4:02 am 
Retro Guru
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Joined: Fri Jan 13, 2012 2:28 am
Posts: 1210
Location: Near Gatwick
You can use sulphuric acid[battery acid], I use an aluminium welding rod as an anode and a car battery/charger as a power source. I was told to use Alum, I bought a little box of it[in Tescos] and intended to try it when I last had to remove a broken tap, but didn't.

PostPosted: Wed Aug 14, 2013 2:21 am 
retrobike rider
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Joined: Thu Apr 17, 2008 1:24 am
Posts: 7665
Location: Manchester
Yes it was ALUM and no electricity is need, well not for electrolysis anyway.
It's needs to be heated to boiling for a few days in my experience!
Also it will destroy anodising.

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