Brazilian Navy ship plates

[Junior2021]

Brazilian Navy ship plates

Good afternoon friends
I'm working on this junk material

These are electronic boards from a Brazilian Navy ship.

As we have a not very correct disposal policy for electronic waste, it is easy to get materials of great performance from any public or federal agency, in this case the Brazilian Navy.

I have decided that I will start with a recovery with hot Hno3 / 3X1 slowly to loosen the Au leaves from the fingers

then I will attack with 2x more Hno3 in higher concentrations to eliminate excess Cu and dissolve it
Then wash the leaves well with hot water and attack with hot HCL for 2x to eliminate tin, Fe, Pb, Sn residues
wash 3 × with boiling water.

So I started an attack with aqua regia to start the purification. Remembering not to isagerar on Hno3 to not give a problem.

Thank you friends

 

[Yggdrasil]

Brazilian Navy ship plates

Good afternoon friends
I'm working on this junk material

These are electronic boards from a Brazilian Navy ship.

As we have a not very correct disposal policy for electronic waste, it is easy to get materials of great performance from any public or federal agency, in this case the Brazilian Navy.

I have decided that I will start with a recovery with hot Hno3 / 3X1 slowly to loosen the Au leaves from the fingers

then I will attack with 2x more Hno3 in higher concentrations to eliminate excess Cu and dissolve it
Then wash the leaves well with hot water and attack with hot HCL for 2x to eliminate tin, Fe, Pb, Sn residues
wash 3 × with boiling water.

So I started an attack with aqua regia to start the purification. Remembering not to isagerar on Hno3 to not give a problem.

Thank you friends

Just make sure there are no Tin on the boards if you use Nitric.
It will create metastannic acid which is a nightmare to filter.
Much better to use Copper Chloride etch, so called AP.
It is slower but it has no risk of adverse hard to filter mud.
Nice find though

 

[Junior2021]

Just make sure there are no Tin on the boards if you use Nitric.
It will create metastannic acid which is a nightmare to filter.
Much better to use Copper Chloride etch, so called AP.
It is slower but it has no risk of adverse hard to filter mud.
Nice find though

Thanks for the tip,
these fingers of au I didn't find tin(Sn) so I thought I'd better go straight to Hno3

I find metastin when I process plated pins there it is difficult to get rid of the tin (Sn)

I have some plated pins I intend to recover in the Ap solution
because I know I will find a lot of tin (Sn). I haven't used AP solution yet, but I read a lot on the forum about it. You have to use little peroxide just to produce copper Cucl chloride to be able to dissolve copper Cu. I think that's it?

It's a really good find
Thank you

 

[Alondro]

Oooo, good stuff there.

 

[Junior2021]

Just make sure there are no Tin on the boards if you use Nitric.
It will create metastannic acid which is a nightmare to filter.
Much better to use Copper Chloride etch, so called AP.
It is slower but it has no risk of adverse hard to filter mud.
Nice find though

Hi

Next week I will start a new batch of this material that is in the photo.

I will need your help if possible.

I thought of direct AR, but the last time I did it and it worked, I wasn't very comfortable putting a lot of base metals together in the same solution. Even dissolving them well in solution

I think it would be a possible AP solution, it would take time to complete and it would be a new experience.

Another way would be Hno3 leaching to recover and further refining in AR I would be more comfortable in this process,

Hno3 in my country Brazil is easy to buy and it costs little.

What do you think friend ?

Thank you good night

 

[Junior2021]

Hi

Next week I will start a new batch of this material that is in the photo.

I will need your help if possible.

I thought of direct AR, but the last time I did it and it worked, I wasn't very comfortable putting a lot of base metals together in the same solution. Even dissolving them well in solution

I think it would be a possible AP solution, it would take time to complete and it would be a new experience.

Another way would be Hno3 leaching to recover and further refining in AR I would be more comfortable in this process,

Hno3 in my country Brazil is easy to buy and it costs little.

What do you think friend ?

Thank you good night

 

[eaglekeeper]

Great looking stuff

Check the IC/ROM chip part numbers on eBay, some could have collector valve way beyond gold content.

I believe those tiny yellow capacitors have MLCC's inside the yellow covering. (both the square and the ones with legs). Crack off the yellow stuff and check them out.

I think I see some TA cap's as well, unfortunately I don't think they're silver cased.... check them as well.

 

[eaglekeeper]

I cracked open a few of those capacitors that I got from my stash. The MLCC's under the yellow coating are non-magnetic, the only piece that's magnetic is the little metal legs. I've also found the square ones in different colors.