Re: Etching

"Lloyd E. Sponenburgh" <lloydspinsidemindspring.com> fired this volley
in news:Xns999D6338FBD7Clloydspmindspringcom@xxxxxxxxxxxx:

So... my read is that it cannot actually etch iron. It can "stain" or
"reveal" features in iron by leaching out other metals, thus leaving a
distinct marking on the metal -- but not actually removing any
significant mass of the "etched" area.


Hmmmm.... maybe I "oops'd" a little. Running the redox again, FeCl3
could dissolve some iron to yeild FeCl2, but it would be darned slow...
maybe hours in the solution, unless heated nearly to boiling, and with
lotsa agitation.

Was this the case? (I try to learn somethin' new ever day. Usually it's
the "wrong" stuff that ends up surprising me.)


LLoyd
.

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