Re: [ATM] Coating removal

[Mark Holm <mdholm@telerama.com>]

Oh yes, I forgot one important caution in addition to this.

Do not use ferric chloride solution with any stainless steel containers
or utensils and don't pour it into a stainless steel sink or a sink with
a stainless steel drain fitting.  One of the few things that will stain
stainless steel is rust, and ferric chloride is a concentrated form of rust.

Mark Holm

ks1u wrote:
> A few words of caution about ferric chloride, if you have any metal
> pipes (drains etc.) in your home and dump it down the sink, make sure to
> flush plenty of water with it.  I had a friend who was making some
> circuit boards for our ham club back in the 80's who dumped the used
> solution into a sink with a metal drain pipe.  The next morning there
> was a terrible mess on the floor when the solution had eaten through an
> old pipe.  Those stains are nearly impossible to remove.  I've also
> found  warming the solution with a small amount of hot water speeds up
> the action.
> 
> George
> 
> 
> 


-- 
Mark Holm
mdholm@telerama.com

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