[TheForge] Broken tap

Sat Sep 28 17:49:03 2002

Well I tried sulfuric acid from a battery. I let it soak for a couple of hours
and it did discolor the tap. I figured that the acid wasn't strong enough so I
poured all of the acid out of a battery (a little over a quart) into a glass
cooking pan and boiled all of the water out of it to concentrate it. I ended up
with about three ounces of yellowish liquid. A couple of drops of that down the
hole with the tap produced a lot of bubbles and turned the tap black and then
the liquid would turn solid and I would have to rinse it out and blow dry to put
in some more acid.
That looked like it was going to be a long slow process so I bought some sodium
bisulfate from the spa store. I mixed some of it in some hot water in a plastic
tub and put the piece of aluminum in to soak over night. No visible results so I
added more sodium bisulfate to the tub until there was about 1/2 inch of
undesolved crystals in the bottom of the tub. then I heated the aluminum up with
a propane torch and put it in the tub.
Again lots of bubbles until the aluminum cooled off. So I heated up the aluminum
again, put it back in the tub and put a light bulb up against the aluminum to
keep it hot. Now I am just going to wait until the bubbles quit and see what
happens.

Darrell

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----- Original Message -----
From: "James Binnion" <[email protected]>
To: <[email protected]>
Sent: Friday, September 27, 2002 12:56 PM
Subject: Re: [TheForge] Broken tap

> A safer solution is to use sodium bisulfate powder which is sold for
> adjusting swimming pool or spa pH it is sold as pH - (minus). Mix it
> with warm water and it will attack the steel of the tap without
> affecting non ferrous metals other than removing oxides from the
> copper alloys. we use this to remove broken taps or more often drill
> bits.
>
> Jim
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