[TheForge] Pit cast iron (or steel?)

[Peter Fels And Phoebe Palmer]

Bruce...have you said what the casting is made out of?
If you mix the etch with coarse sawdust in a plastic bag and 
plunk the piece in...and shake it...Then close it up and check 
back in a while...it ought to do it...pete

Peter Hirst wrote:
> Ordinary rust is produced by an electrochemical process, and can really 
> be moved along by induced electrolysis.  Hook that sucker to the anode 
> instead of the cathode in the usual setup described for electrolytic 
> rust removal and watch what happens.
> 
> 
> ----- Original Message ----- From: "Bruce Freeman" <freemab222 at gmail.com>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Sunday, February 17, 2008 10:57 AM
> Subject: [TheForge] Pit cast iron (or steel?)
> 
> 
>> A friend is working on an artistic casting, currently with a ground
>> surface.  He wants to "age" it by pitting and rusting.  He's tried
>> muriatic acid (at cold, outdoor temperatures) and it's a no-go so far.
>>
>> I've advised him  NOT to move muriatic inside.  He's thinking about
>> other chemicals and could use some advice. Does anyone have practical
>> experience trying to accomplish such pitting, and can tell how?
>>
>> -- 
>> Bruce
>> NJ
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