Ferric is a deeper more contrasty etch than nitric and gives a more pleasing
etch. It can be used as an alternative to a nitric etch. We use it all the
time and it is the only etchant we use. And its easier to obtain and handle
than nitric. See our article ETCHING IRON METEORITES (The Myth of Nitric
Acid) in Meteorite Times, November, 2002:
http://www.meteorite-times.com/Back_Links/2002/November/index.htm
Ron Hartman
----- Original Message -----
From: "R N Hartman" <[email protected]>
To: <[email protected]>; "MeteoriteList"
<[email protected]>
Sent: Thursday, October 29, 2009 4:33 PM
Subject: Re: [meteorite-list] Issue with etching via ferric choride
Hello McCartney (and all):
Yes, the etch happens very quickly and you need to terminate it by a
quick wash under running water. Follow with a rinse in distilled water if
you want to but we never do and it works fine. You don;t have to
neutralize it, just wash it off VERY FAST. In fact, I use running water
to slow down the process as I am doing it, especially if I need to etch
one section of a surface more. There is a bit of a technique - just
practice and you will do well. If yo are getting staining your washing is
incomplete.
Ron Hartman
----- Original Message -----
From: "McCartney Taylor" <[email protected]>
To: "MeteoriteList" <[email protected]>
Sent: Thursday, October 29, 2009 2:58 PM
Subject: [meteorite-list] Issue with etching via ferric choride
Having a bit of a problem on some etch jobs and having to re-etch a few
specimens.
How do you rinse/neutralize your ferric after the etch? I'm getting
remnant staining and sometimes corrosion. I'm doing something wrong.
Any ideas?
-mt
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