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Posted by Randy Replogle on May 19, 2008, 12:31 pm
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Ignoramus31588 wrote:
> I have a few zinc plated steel retainer brackets that are of no
> general value. 3/8 by 1" in cross section, slieghtly bent.
>
> I wanted to use them for welding practice, but I need to remove zinc
> first. Is there some easy thermal or chemical way to do it, like maybe
> put in a barbeque for an hour, or acid or something like that?
>
I think toilet cleaner will do it. Do it outside, of course.
RR
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Posted by Ed Huntress on May 19, 2008, 1:15 pm
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>I have a few zinc plated steel retainer brackets that are of no
> general value. 3/8 by 1" in cross section, slieghtly bent.
>
> I wanted to use them for welding practice, but I need to remove zinc
> first. Is there some easy thermal or chemical way to do it, like maybe
> put in a barbeque for an hour, or acid or something like that?
Muriatic acid. I can clean off the ends of electrical conduit in about 15
minutes in the regular hardware-store dilution.
About four years ago, I think, we were talking about this here and there was
some worry about rusting resulting from chloride left in the pores of the
steel from this treatment, plus neutralizing in lye solution. So I ran a
test. I treated four pieces and just washed them off with tap water, very
thoroughly, and put them on the shelf in my basement. It's about average
dampness down there. I haven't touched them since, but I look at them every
once in a while. I just looked -- still no rust at all, after four years.
They're as bright as the day I put them there.
This is the treatment I've used for making my welding and brazing practice
pieces. I still wear one of the cheap 3M masks that protect against
zinc-fume fever.
--
Ed Huntress
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Posted by RoyJ on May 19, 2008, 1:51 pm
Please log in for more thread options We always use 30% muriatic acid sold for $2 a gallon at the home stores
for cleaning concrete and mortar or at pool supply places for lowering
the ph. Do this OUTSIDE, it liberates hydrogen that will rust anything
else in sight. Usual comments about gloves and goggles. When you are
done, you can neutralize it with garden lime. You wind up with a rather
contaminated batch of zinc chloride.
Ignoramus31588 wrote:
> I have a few zinc plated steel retainer brackets that are of no
> general value. 3/8 by 1" in cross section, slieghtly bent.
>
> I wanted to use them for welding practice, but I need to remove zinc
> first. Is there some easy thermal or chemical way to do it, like maybe
> put in a barbeque for an hour, or acid or something like that?
>
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Posted by Michael Koblic on May 19, 2008, 4:47 pm
Please log in for more thread options Ferric Chloride (for making PCBs). It seems to remove zinc from galvanized
washers. No fumes, less worry about spills.
Interesting: Some people recommend neutralizing the FeCl after the etch. I
found if I did it with baking soda the part rusted *in front of my eyes*.
--
Michael Koblic,
Campbell River, BC
> We always use 30% muriatic acid sold for $2 a gallon at the home stores
> for cleaning concrete and mortar or at pool supply places for lowering the
> ph. Do this OUTSIDE, it liberates hydrogen that will rust anything else in
> sight. Usual comments about gloves and goggles. When you are done, you can
> neutralize it with garden lime. You wind up with a rather contaminated
> batch of zinc chloride.
>
> Ignoramus31588 wrote:
>> I have a few zinc plated steel retainer brackets that are of no
>> general value. 3/8 by 1" in cross section, slieghtly bent. I wanted to
>> use them for welding practice, but I need to remove zinc
>> first. Is there some easy thermal or chemical way to do it, like maybe
>> put in a barbeque for an hour, or acid or something like that?
>>
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Posted by Grant Erwin on May 19, 2008, 5:01 pm
Please log in for more thread options Michael Koblic wrote:
> Ferric Chloride (for making PCBs). It seems to remove zinc from galvanized
> washers. No fumes, less worry about spills.
>
> Interesting: Some people recommend neutralizing the FeCl after the etch. I
> found if I did it with baking soda the part rusted *in front of my eyes*.
>
If you want some ferric chloride, just buy some muriatic and dissolve steel in
it until no more will dissolve. Bob's yer uncle.
Grant
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> general value. 3/8 by 1" in cross section, slieghtly bent.
>
> I wanted to use them for welding practice, but I need to remove zinc
> first. Is there some easy thermal or chemical way to do it, like maybe
> put in a barbeque for an hour, or acid or something like that?
>