Hi Richard5 gallons of copper sulfate for removing silver from plated garage cell junk,using electrolysis, this copper sulfate came from distilling nitric acid (homemade),
butcher said:I have posts on both of these. this is just overveiw, there is more detail in other posts.
Distilling nitric from fertilizer and new battery acid in this same batch I dissolve pin's copper with gold plating, the copper makes a copper sulfate, left behind with undissolved gold flakes, water is added to this warm copper sulfate solution diluting the water soluble copper sulfate, gold flakes are seperated, and the copper sulfate is saved for later use.
Now the silver coated copper items bought from second hand store, cut to fit jar most just in strip's , but one is cut in circle to fit jar bottom it has a long tang, think of a circle with one long rectangle still attached, this tang is bent up for the cathode (Battery minus), the anodes are cut to strips from same silver plated object, these will be hooked up to battery positive light bulb, a battery charger is hooked up to charge battery, now in the anode wire from battery plus there is a 12 volt automobile tail lamp the other wire from this light goes to the anode silver plated copper strip to be deplated (or dissolved), this breaks down the anode to powders in solution, basically copper and silver powders (or brass if silver plated brass anodes), I have been using used acid peroxide and some fresh acid and H2O2 to get most of the copper from these powders, making silver chloride, this silver chloride can be converted with NaOH and light corn syrup back to silver and melted, (used to inquart gold), (run back through cell) or so on, it is not pure silver but getting closer, and when most people sell the silver plated copper as just copper, I get the silver.
I have done some expierimenting with the copper sulfate electrolyte, sometimes I get a mix that will deplate the silver, and not dissolve much brass or copper, problem is I am not sure of the exact mix yet, but it contains mostly copper sulfate, a tiny bit of nitric and the HCL wash from a previous batch of silver chloride, basically a very dilute tiny bit of aqua regia in my copper sulfate, this while deplating the silver plate some comes off as the copper under the silver plate is attacked, and some of the silver turns to a white silver chloride powder, which after deplating for around an hour I will brush off into the jar cell. if you try this study about the gases formed from electrolytic solutions, even these if a feller built a cell to collect them could prove useful, or dangerous if a feller did not do his homework.
I have also tried using a dilute HNO3 electrolyte, but I seem to like the copper sulfate better.
I also melt the contact points into bars and use them as anode to get them broke down to powders.powders are easier for acids to disolve.
have read in an old book that a stong sulfuric acid with a little nitric acid and heated will deplate silver plate, and they were using it to remove the bad plating to replate articles, I am not sure of all the details, but am sure if a feller wanted he could find out more about it, GSP would Know about the electrolytes and methods much better than me.
butcher said:Thanks Jim, I knew ferrous chloride was used to etch copper in circuit boards, but did not know about the air making it dissolve gold that easily, seems like the iron would displace the gold, easier than a copper would,I could understand a strong oxidizer, making it easier to attack gold,a good hot boil should remove any air, that is one way we pretreat our boiler water to remove oxygen, in a deareator to preheat water, the hot water cannot hold as much air, and oxygen attacks the iron in the boiler's.
I just used 5 gallons of copper sulfate for removing
silver from plated garage cell junk,using
electrolysis, this copper sulfate
butcher said:Barren, I read that also, he did not state an electrolyte makeup or any details, and I believe he said a friend of his was stripping the silver and polishing copper article and selling it. it would be nice to know details on the electrolyte and cell details.
what I have been doing works but it is work dealing with copper chloride (I), and I have been trying not to use nitric, as I can get silver back later and did not want to spend much $$ on it, but I am not having to pay for labor, and my time is not counted as expense.
Jim thanks for getting me to do some homework on the ferric chloride, I have used it long ago to etch circuit traces, but did not know chemistry of it, I have not got to look into its use a a gold leach yet, but I will, here is something interesting about it with ethanol and ammonia we can get ammonium chloride, an alternative use for that moonshine? :lol:
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