Gold Recovery with Reverse Electroplating - Part 1 Gold Stripping
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- Опубликовано: 14 авг 2020
- Decided to share with you my favorite method for gold recovery - Gold Reverse Electroplating. It is not the quickest method of gold recovery but is definitely one of the methods that covers all types of gold plated materials: from poor pins to thick gold plated objects.
Развлечения
Nice, very informative. Thank you
Thanks!
Very Informative and understandable.👍
Thanks!
Very helpful! Thanks!
Welcome!
My friend...This is excellent!!! The best explanation of this method I have seen! I believe you have answered part of my last questions. I am ordering copper mesh and dc supply. Very good!!! Thank you so much!
Just be extra careful with concentrated sulphuric acid. Best approach to coagulate gold is to heat concentrated acid almost to moulding for a while. Then is easy to separate. 👍
@@escrapchannel Oh I have learned to be very careful. Thank you so much for your time. I will let you know the outcome.
@@JustJeff420 👍
@@escrapchannel Hello once again my friend. Is the stainless steel electrode magnetic stainless or is non magnetic? Thank you for your time.
Hi, The one I use in the video was in non magnetic.
Waiting for the next video !!!
I was interested in reverse electroplating. Like number 23 my friend 👍😊
Thanks!
What you need is a mesh made of a conductive material that is not soluble in sulfuric acid and I wonder what would suit that role?
Do you think the large stick pieces that take so long would work faster if the acid were heated because it seems like it would and I wonder if the addition of salt might help without contaminating things too much
Best material for the mesh is brass or copper. They are stable in concentrated sulphuric acid. Cell is slowly heated by the reverse electroplating. Heat is not helping, so in larger scale cells are cooled during work.
Very good video
Thanks!
At 5 volts, what purity do you find you get on average opposed to base metals that also dissolve?
Hi, for me 5V is an acceptable speed/purity voltage. As I process the product further in aqua regia I did not directly melt the cell product to check purity.
The good think at 5V is that it is low enough to avoid foam and other nasty effects that start if you further increase voltage.
Would this work the same for gold-filled as it does for gold-plated?
It seems like it wouldn't because gold is not soluble in room temperature sulfuric acid but I'm just wondering what your experience is because I have no experience with it myself and to be honest I'm having trouble seeing why it works so well with gold-plated for the same reason but then again it's not exactly in solution is it it's in suspension but I'm still unclear as to why
Hi, reverse electroplating is a slow process. For me it best works for layers of gold up to 5 microns as process is relatively fast and effective. The thicker the gold layer the more time you wait and for gold filled should be very slow. Gold is in solution as colloid gold suspension, that’s correct. If you boil the acid after completing the process gold will aggregate in pretty big pieces.
👍🙂, продолжение будет? Сколько получилось золота после электролиза?
Yes, it is coming tomorrow 😃 Material was not a lot, and part of it really thin gold plated, so not that much: 0.27 g.
Great video!
What is your power supply?
Hi, I use voltcraft.
nice...are the cathode using pure stainless steel or can use any kind of metal
Hi, cathode can be different, but I find stainless steel as perfect. Not reacting, practically inert and easy to remove the coloidal gold when deposited on top.
3 question , first How much big the concentration of the sulfuric acid? second the bakers were made from normal glass or quartz glass ? third How much big the temperature of the solution? thank your answer
Hello, sulphuric acid is 98%, normal glass, room temperature. Did not noticeably increase during the reaction.
Tried in a simple electrolyte works but quickly begins to dissolve the base
96% серная кослота, не менше
Hello again my friend. Question. Right the time 17:40 in the video you mention water diluting the sulfuric. You are referring to the water that is already in the sulfuric. NOT water that is mixed with the sulfuric that you diluted with? Correct?
Hi, concentrated sulphuric acid is absorbing water from the air and concentration is dropping with time.
@@escrapchannel Thank you!👍👍
Welcome!
@@escrapchannel Brother...What a experience!!! I just performed my first reverse electroplating! Absolutely incredible! I have almost 5 pounds of plated material processed! I did almost have a accident. I was dipping a piece and I noticed a drop of sweat getting ready to drop from my glove into the acid. That would've been a problem! Correct? Thank you so much for the knowledge of this method. Works great!!! I'll let you know the outcome.
👍
With the removal of the fake gold plating whatever it was it is now in solution contaminating your gold or am I missing something
Hi, I do not directly melt the gold collected from the cell. After separating the residue I go through aqua Regia dissolving and reduction of gold. This purifies the gold after reverse electroplating.
Sir may I use fixed power supply like mobile charger it's give me a output around 5V and 2A is it OK for the process sir
Hi, it will work. I’ve never tried but there are videos on internet showing the process.
thanks for the reply sir
whatare you doing for ventalation?
Hi, I use the body of a standard kitchen ventilation but motor is replaced with chemically resistant one.
Super job... Like
Thank you!
Where do you get your parts
Hi, auctions, eBay, …
I have question...... Exist some way to recover gold from plated watches, WITHOUT ACID? Because i have problem with buy Nitric and sulphuric acid in my region.... TY ❤
Hi, reading your email I count the methods I know and yes, there are gold stripping agents like ecogoldex, with gold cementation with zinc afterwards. But such methods are slow for the plated watches cases.
@@escrapchannelTy, but i have only 1kg of soviet and unfukcional watches this is very expensive for this. TY❤
@@GOLD9ii Hi, I never tried what I will write here but I remember citric acid reacts well with copper, so if you chop watches cases in pieces and put multiple times in citric acid you may end up with gold foils after some time. Will not be quick. Gold foils will not be 24k but somewhere between 10-16k it may come out.
@@escrapchannel❤ u are my god TY
Thank you. Also what is that accent? Russian?
Close ... Bulgarian :)
hi would it be safe to remove gold plating from brass using this method?
Hi, yes. Brass stays intact in concentrated sulphuric acid.
@@escrapchannel Thankyou so much. It is the most informative video on this process that i have seen. Can the sulphuric acid be less than 96%?
Hi, as concentrated is considered 96%. As sulphuric acid absorbs water from air concentration is dropping constantly. When diluted sulphuric acid starts reacting with metals, so I would try object without value before using method for something expensive to strip gold from.
@@escrapchannel thankyou. one last question. would i still use stainless steel anode or use a different metal anode when stripping from brass?
@@user-kr6xf7kw3n Stainless steel is working for stripping gold from brass for sure.
Another vid!
Decided to spend some time in the lab this Saturday :)
i hit the play all button before bed that should build you some watch time buddy!
Thanks! My metrics are pathetic 😃
eScrap Channel you’ve been gaining subs faster than most!
Really? So, it is not that bad? Thank you!
Trying to focus mostly on the videos!
@@escrapchannel your channel is most excellent and I'm going to let people know in my next video!
Roe Mantic: Thank you!
Да хороший способ снятия позолот 🎃
Thanks!
Крутой видос ,👍,жду в гости на своем канале
Wow! Great content!!!