Gold fill over Brass

[dofustofy]

Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

 

[dofustofy]

Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

 

[Yggdrasil]

Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

If you added AR there would not be anything to filter out.
All the metals should be dissolved.

 

[Martijn]

If you added AR there would not be anything to filter out.
All the metals should be dissolved.

I guess he is saying that his foils dissolved nicely, (nothing found in the filter) but he did not see it back after SMB?

 

[Martijn]

My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB.

what happened to this solution? do you have a stockpot?

 

[Yggdrasil]

I guess he is saying that his foils dissolved nicely, (nothing found in the filter) but he did not see it back after SMB?

That is the mystery is it not, I'm wondering if he expected the Gold to still be there.
That was the reason for my the way I replied.

 

[dofustofy]

Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

I guess he is saying that his foils dissolved nicely, (nothing found in the filter) but he did not see it back after SMB?

Yes, that is correct. If you look closely at the screenshots I uploaded you can see the test sample has some odd precipitate form at the bottom of the beaker.

 

[Yggdrasil]

Yes, that is correct. If you look closely at the screenshots I uploaded you can see the test sample has some odd precipitate form at the bottom of the beaker.

If it did not precipitate it might have too much excess Nitric.
Try to put in a slab of solid Copper.

 

[dofustofy]

what happened to this solution? do you have a stockpot?

Yes I have a stock pot and all that solution is still in my stock pot from my previous attempt and today's which was only a test of those gold foils I have sitting in the bottom of my beaker

 

[dofustofy]

Yes I have a stock pot and all that solution is still in my stock pot from my previous attempt and today's which was only a test of those gold foils I have sitting in the bottom of my beaker

To give you guys an idea of where I'm coming from I tried this last month with some previous gold fill over brass that I had acquired and I treated the experiment just like it was gold fill over silver. Nothing new except I get nothing after SMB. It's very strange.

 

[Yggdrasil]

To give you guys an idea of where I'm coming from I tried this last month with some previous gold fill over brass that I had acquired and I treated the experiment just like it was gold fill over silver. Nothing new except I get nothing after SMB. It's very strange.

Most likely too much Nitric.

 

[anarxi]

Perhaps there is simply little gold in reality.
Brass is not directly coated with gold.
There is an underlayer of nickel that makes the foil look so thick.

 

[Yggdrasil]

Perhaps there is simply little gold in reality.
Brass is not directly coated with gold.
There is an underlayer of nickel that makes the foil look so thick.

I think he said it was Gold filled, not plated?

 

[dofustofy]

That is the mystery is it not, I'm wondering if he expected the Gold to still be there.
That was the reason for my the way I replied.

If I'm understanding you correctly you're saying that you thought that maybe I was thinking Gold foils

Perhaps there is simply little gold in reality.
Brass is not directly coated with gold.
There is an underlayer of nickel that makes the foil look so thick

 

[Yggdrasil]

Hey, guys.

Im working on recovering Gold from a few pieces of gold fill over Brass this morning, and im cleaning up these foils with distilled water rinses. I used Distilled water, and Nitric acid boils to remove the base metals from these pieces and before I move to the next step, Aqua regia has any one encountered any problems. My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB. I am not sure about Brass, as I have never seen this problem in any of my previous gold recovery, refining experiments. Is there something I am missing prior to going to aqua regia. This jewelry is gold fill over Brass.

I have attached a photo of 1 last distilled water and Nitric acid boil.

Thank you for all you guys support.

Dustin

Can you confirm.
Is it Gold filled or Gold plated?
There is a major difference.

 

[dofustofy]

If I'm understanding you correctly you're saying that you thought that maybe I was thinking Gold foils

I was told that this is Brazilian gold fill over brass. Maybe that is the problem I got to do in a little bit of research on Brazilian gold and they say it's only 0.3%

 

[dofustofy]

Can you confirm.
Is it Gold filled or Gold plated?
There is a major difference.

I was told that it was gold fill. There are no real markings to indicate that it's 1/ 20 gold fill however there are markings on the jewelry

 

[Yggdrasil]

If I'm understanding you correctly you're saying that you thought that maybe I was thinking Gold foils

You are double quoting so to whom is the question directed?
If it was me I wondered if you expected the foils to be intact after AR.

This phrase do hint at that:

My previous attempt ended in failure as I went to aqua regia and the solution turned a dark Greenish color almost Black and I wasn't able to recover any of the gold foils after I filtered out any trash then going to SMB

 

[Yggdrasil]

I was told that it was gold fill. There are no real markings to indicate that it's 1/ 20 gold fill however there are markings on the jewelry

Then you probably have Gold plating and that will not amount to much.
How thick are the foils?
Do they fall apart after they are loose or do they hold their shape well?

 

[dofustofy]

Then you probably have Gold plating and that will not amount to much.
How thick are the foils?
Do they fall apart after they are loose or do they hold their shape well?

They dont look like formal shells of themselves as there were 4 pieces of jewelry.