[TheForge] Re: acid

[Jerry Smith]

Maybe I am a little paranoid, but these days I
wouldn't talk about having some of these things on the
net. Something about Kaboom comes to mind.

Jerry
--- Mike Spencer <mspencer at tallships.ca> wrote:

> 
> > ... use for the the others or different uses than
> the ones I already
> > mentioned?
> 
> > 1 liter of Nitric acid
> 
> I've used it to etch my signature on art pieces
> where it seemed the
> best way.  Paint-on resist and  a wax dam around the
> polished
> signature surface.
> 
> I've never done it but reputedly you can remove a
> broken tap or drill
> from mild steel by repeatedly dribbling concentrated
> HNO3 into the
> hole where the acid will attack the hard tool steel
> faster than the
> m/s and loosen the broken piece.  
> 
> I've also used it to etch the brass ball bearing
> cages from British
> Leyland vehicles down to feathery thinness to make
> ear rings for a
> woman who raced a Mini.
> 
> > 1 gallon of crystaline NaOH  (lye)
> 
> Excellent for degreasing/dewaxing a polished steel
> piece before
> attempting a heat or chemical patina.  Boil the
> piece in an NaOH
> solution.  Rinse thoroughly with water, possibly
> including
> neutralizing with dilute acetic acid and further
> rinsing.  When I was
> making a series of brass-inlaid belt buckles with
> heat patina as the
> final step, traces of wax & oil I had used as a
> lubricant for the
> chisels boiled out from under the inlay and spoiled
> the patina.
> Boiling the buckles in NaOH between the chiseling
> and inlaying steps
> fixed that.
> 
> > I know about safe handling of these chemicals
> thanks to OHSA
> > training.
> 
> Oh, good!  So I can skip the horror stories. :-)
> 
> - Mike
> 
> -- 
> Michael Spencer                  Nova Scotia, Canada
>       .~. 
>                                                     
>       /V\ 
> mspencer at tallships.ca                               
>      /( )\
> http://home.tallships.ca/mspencer/                  
>      ^^-^^
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