Quick zinc removal

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Quick zinc removal Ignoramus31588 05-19-2008
Posted by Michael Koblic on May 19, 2008, 9:12 pm
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 The whole point of using FeCl is to avoid the hassle of using muriatic acid.
FeCl is easy to get.

> 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



Posted by Martin H. Eastburn on May 19, 2008, 10:21 pm
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 I do that.

What I have is a super saturated tank of baking soda. That is
take say 3 gallons of water and add several pounds of Baking soda.

It will be cloudy as baking soda is fine and is breaking down.

You want so much in the tank that there are layers in the bottom.

When used, the acid like water dissolves more soda and goes back to soda water.

If I recall, the item flash rusted when there were ions still on the steel
and there wasn't enough soda to change it.

There are several chemicals useful.

Lye good as is strong base
Ammonia (stinky) but best due to the liquid.
Baking Soda Easily obtained in the cooking section - big box stores.

Martin

Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/


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*.
>


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Posted by Ignoramus31588 on May 19, 2008, 10:28 pm
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I used muriatic acid. Which I have a jar of, that I use and reuse for
everything. It is working right now and I can see plenty of fine
bubbling. I will then have 16 beautiful brackets that are no good for
anything other than welding practice, so I will actually be welding
them.

Life is good.

i

Posted by Ed Huntress on May 19, 2008, 11:43 pm
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>I used muriatic acid. Which I have a jar of, that I use and reuse for
> everything. It is working right now and I can see plenty of fine
> bubbling. I will then have 16 beautiful brackets that are no good for
> anything other than welding practice, so I will actually be welding
> them.
>
> Life is good.

Just don't leave them in too long. Muriatic (dilute hydrochloric) acid will
etch the base metal and leave a porous surface if you let it stand much too
long. I try to pull it out as soon as the zinc is clearly gone.

--
Ed Huntress



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