Hello Marcin,
Very unusual to see. With no knowledge on this subject, i'll try at a
Possible
"solution" (no pun intended)...........
If, if, as you say, all slices were prepared the same and no other coating
was
left on on the piece(s) that wouldn't take the etch---is it Possible that
they may
have somehow become electomagnetically charged (preventing the chemical
bond)
and the piece you used to scratch the object piece broke/relieved this
charge
in order for the solution to begin its work??
Mirko?
All best, John
Yes this can be one reasonable explanation. But this is like You put finger
into the fire and nothing happend :)
Looks like Force is with me and my slices!
-----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
http://www.Meteoryty.pl marcin(at)meteoryty.pl
http://www.PolandMET.com marcin(at)polandmet.com
http://www.Gao-Guenie.com GSM: +48 (793) 567667
--------[ Member of Polish Meteoritical Society ]--------
----- Original Message -----
From: "PolandMET via Meteorite-list" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 25, 2015 4:57 PM
Subject: [meteorite-list] Unusual phenomen during etching iron meteorites
Dear meteorite friends.
Tooday I etched some Maslyanino slices and beetween 10 of them, two slices
do not want start etching. I was able to capture this very strange
phenomen
with my macro lens. I cant explain this. Maybe someone can ?
Let me explain whats going on here.
Normaly, when slice is placed in etching solution, etching starts
immediately in the same second. But rarely, I can keep slice even 5 or 10
minutes without any signs of etching. On this video, there is one of 10
slices of Maslyanino that comes from same slice divided to smaller
specimens, so material was prepared 100% the same. Only two of this 10
slices can't be etched in normal way. They need a starter. This mean I
need
to scratch them with other slice to start etching. This is visible at 1:40
when I finally use correct slice to start etch reaction. You can see then
how solution move from the place of scratch in all direction and etching
starts immediatelly.
https://www.youtube.com/watch?v=Sd9s56NuTVQ&feature=youtu.be
-----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
http://www.Meteoryty.pl marcin(at)meteoryty.pl
http://www.PolandMET.com marcin(at)polandmet.com
http://www.Gao-Guenie.com GSM: +48 (793) 567667
--------[ Member of Polish Meteoritical Society ]--------
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