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Forum index » Science and Technology » Chem » Electrochem
Removing nickel with Potassium Iodide + Iodine
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WAYNEL
science forum beginner


Joined: 20 Aug 2005
Posts: 26

PostPosted: Mon Oct 17, 2005 7:53 pm    Post subject: Removing nickel with Potassium Iodide + Iodine Reply with quote
Hi


I am trying to remove gold and the nickel barrier from a printed
circuit board with Potassium Iodide + Iodine, to leave very clean
copper.
After which I intend to clean with HCl.


Can anyone see any problems with this method e.g. will it remove nickel
also?





Cheers


WayneL
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beav
science forum addict


Joined: 18 Oct 2005
Posts: 63

PostPosted: Tue Oct 18, 2005 3:18 pm    Post subject: Re: Removing nickel with Potassium Iodide + Iodine Reply with quote
On 17 Oct 2005 12:53:37 -0700, "WAYNEL" <home@wlawson.co.uk> wrote:

Quote:
Hi


I am trying to remove gold and the nickel barrier from a printed
circuit board with Potassium Iodide + Iodine, to leave very clean
copper.
After which I intend to clean with HCl.


Can anyone see any problems with this method e.g. will it remove nickel
also?





Cheers


WayneL


will the KI3 even touch the Au? I have experience using a similar
solution to keep an air dried Ni surface unoxidized prior to Cr plate,
but I'd question its ability to remove the Ni also.


have you tried it, or is this a trial balloon? i'm interested in how
it works for you..

good luck.
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WAYNEL
science forum beginner


Joined: 20 Aug 2005
Posts: 26

PostPosted: Tue Oct 18, 2005 8:13 pm    Post subject: Re: Removing nickel with Potassium Iodide + Iodine Reply with quote
Hi


Potassium Iodide + Iodine is an standard method used in the
semiconductor industry, Transene sell a similar product see link.

http://www.transene.com/au_etchant.html

I have not tried it on nickel and from my recent queries it may not
work. Therefore, I am trying to find something that will desolve
nickel but keep copper intact. Any suggestion?

Cheers


WayneL
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