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Stripping nickel from brass

Hi, I try to strip nickel from brass but I am unsuccessful when I used chemicals (which I don't know the formula - bought from a company )working electroless.
I am studying for the chemicals that is used with electrolytic , so can you advice me which chemicals can I use when it is electrolytic?

Lütfiye Can
- Istanbul TURKEY
September 5, 2008

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First of two simultaneous responses -- September 12, 2008

Dear Mr. Can,

If you need to strip nickel from brass, then I recommend to use Golpanol MBS (sodium nitrobenzene sulfonate) from BASF company.

As far as I remember it right now you need 100 g of Golpanol MBS and 180 g of concentrated sulfuric acid for 1 litre of ready-for-use stripping solution.

Temperature: about 60-65°C

1. Soak until all the nickel has been dissolved and a black film will cover the stripped parts.
2. Water rinse thoroughly.
3. Soak the parts in a 3-5 % sodium cyanide solution in room temperature until the black film has been removed.
4. Water rinse and dry up.
5. Slightly re-polish.

But you can also ask BASF for help, they offer standard formulations.

Hope that helps!

Martin Michel
- Bielefeld, NRW, Germany

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Second of two simultaneous responses -- September 14, 2008

Hi, I would recommend Ni-plex .

Bot sure of the make up but I'm sure you will find it on this site.

hope this helps

Jay Smith
- Essex, UK

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Thanks for the help, folks. To the extent practical, let's keep the discussion non-proprietary. I'm sure that you can appreciate that the site's supporting advertisers might be reluctant to fund a forum where we spend their money posting recommendations to use their competitors' products :-)

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 14, 2008

Hi, Martin I tried your recommend but it took 1.5 hour so again can I ask that is the solution can be used electrically?

Lütfiye Can
ADA - Turkey
September 16, 2008