About 4 years ago I was brazing up a prototype bike frame from EMT and
I used 'some kind' of household product to remove the galvanizing, in
the area of the joints.

Now I can't remember what it was that I used.

I do remember that it was a liquid, that I put some in a glass jar and
stood the end of the tube in it and also that it fizzed and bubbled
somewhat.

If you would jog my memory here, I'd appreciate it.

Lewis.

********

--Probably muriatic acid. Be very careful with this stuff; it
usually comes in green plastic gallon jugs and you'll probably find that
the jug degrades and starts falling apart long before the muriatic is used
up. Plan on having a large quantity of whatever's used to neutralize it to
hand just in case. Also use out of doors and do NOT breathe the stuff!
Neutralize stripped part with running water; make sure your critters aren't
going to drink from the puddle.

--
"Steamboat Ed" Haas : Whatever happened
Hacking the Trailing Edge! : to Tom Nelson?
http://www.nmpproducts.com/intro.htm
---Decks a-wash in a sea of words---

"steamer" wrote in message
...
--Probably muriatic acid. Be very careful with this stuff; it

The grocery store version is "Sno-Bol" toilet bowl cleaner. It contains
about 10% HCl with mostly water and detergents for the rest.

It's quite corrosive enough to both remove the zinc, and pickle the steel
prior to brazing.

LLoyd

Might have been lye. Draino and oven cleaners contain this.

Uncle George

On 25 Jan 2006 18:25:08 GMT, steamer wrote:

--Probably muriatic acid. Be very careful with this stuff; it
usually comes in green plastic gallon jugs and you'll probably find that
the jug degrades and starts falling apart long before the muriatic is used
up. Plan on having a large quantity of whatever's used to neutralize it to
hand just in case. Also use out of doors and do NOT breathe the stuff!
Neutralize stripped part with running water; make sure your critters aren't
going to drink from the puddle.

The grocery store version is "Sno-Bol" toilet bowl cleaner.


Thanks, LLoyd, I think that must have been what I used.

Lewis.

******

wrote:
About 4 years ago I was brazing up a prototype bike frame from EMT and
I used 'some kind' of household product to remove the galvanizing, in
the area of the joints.

Now I can't remember what it was that I used.

I do remember that it was a liquid, that I put some in a glass jar and
stood the end of the tube in it and also that it fizzed and bubbled
somewhat.

If you would jog my memory here, I'd appreciate it.

Lewis.

********

"spirits of salts" is its traditional name - used by roof plumbers for
removing galvanizing on guttering prior to soldering. Comes in small
glass jars. Applied with home made brush - piece of copper pipe belted
flat on a bunch of horsehair. Probably NLA now, but worth a try at
your local plumbing supplies store.

Andrew VK3BFA.