That is pretty common. The silliest thing you can do is to put all type of sulfates into batteries in the hope of solving a problem. Urban myth will never ever die. Pencil lead can contain some weird substances in addition to carbon (how do you recondition a dead battery). There are a lot of carbon powder producers. Cars and truck tyres are about 50% carbon.
Does not cost an arm and a leg. Afdhal- I get cadmium from utilized NiCd cells-aaa or aa sizes- such as discovered in solar garden lights- after a few years they are thrown out as NiCd is worn out- merely cut around leading crimp with hacksaw, unravel s/s case with cutter, withdraw contents- outer foil is cadmium, inner foil is nickel, & some strong electrolyte & seperator- all wound in spiral pattern.
To obtain Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release harmful fumes- do outside -do not breathe vapours!!! When cadmium is completely dissolved( & often the electrolyte cadmium mix is a charming green, depending upon quality of cadmium from cell maker!)- job done! Got ta say- the mix I have included to batt cells does not seem to help! In truth- I got ta state the ONLY thing I used that worked was INOX MX2( in 1 batt so far- I will get some more MX2 &try; & try; in other batts to validate yes or no! Apart from that, the other thing is that the batt itself should be just lightly sulfated).
Still it is excellent at recognizing o/c cell/s in batt- pulses go up higher with degree of o/c! have seen 1250 volts! Cut open, & broke down pos grid! in 1 cell-others practically so!. auto battery reconditioning. Bevan - I would recommend refining the cadmium by making the cadmium you recovered from the NiCds the favorable in an electroplating cell.
Use a tin wire or solder wire unfavorable. Source of power can be 12V battery. Insert 220 ohm series resistor. The cadmium that gets plated onto the negative will be dendritic and pure. The real voltage across the electroplating cell will be under 0. auto battery reconditioning. 5V. The green you describe would be nickel contamination.
Bevan - That's innovative! Why didn't I believe of that before? I will try it. John - You're one wise gentleman, thanks for the information. Bevan - I think I might have at long last managed to find out what cadmium sulfate does. It absolutely electroplates out onto the negative grid metal when the battery is intentionally pushed into controlled overcharge.
This assists the lead sulfate nearest the grids to end up being active again and to be converted into lead and sulfate ions. Repeated charging, discharging spreads the conductive environment slowly and progressively into the bulk of the lead sulfate. The procedure appears to have a limit. 12 volt battery reconditioning. It would appear the trick to accomplishing 100% desulfation is to figure out how to get conduction to spread out into 100% of the sulfate.
Adding gradually more merely creates dendrites and triggers shorts. The descriptions given by desulation merchants that insoluble sulfation undoubtedly coats the plates when batteries are used and that their treatment strips it away is pure dream. The sulfate remains right where it is. It is transformed. While both favorable and unfavorable plates can end up being sulfated, the favorable sulfation just reverses when the battery is charged.
John - If I understand you correctly, did you implied all the cadmium does is electroplating itself on the unfavorable grid?If so, wouldn't simply copper is good enough? Afdhal- it is simply John's theory- but i would state cadmium does not simply plate itself- requirements driving- so does copper- BUT copper is a non laster in H2SO4! As are most metals! Lead lasts longer than most! Afdhal - No, copper and copper sulfate are not appropriate.
Cadmium has an electrochemical capacity of -0. 4030V. Lead has an electrochemical potential of -0. 1262V. The electrochemical capacity of cadmium is such that it avoids electroplating when a battery is standing. It is just when a battery is placed on gassing charge that the voltage at the unfavorable plate prefers electroplating.
Copper has an electrochemical prospective Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will simply plate onto the negatives regardless and stay there, triggering the plates to gas and to self discharge and to sulfate. The electrochemical capacities of aluminum, magnesium, potassium, salt, etc. are all far to unfavorable, the metals far too reactive in battery acid, for anything of benefit to take place.
Bevan - It is not a theory. I ran the experiments. Built lead-acid cells in glass containers. I observed and measured (how do you recondition a battery). John- to my understanding, what you have actually done is an experiment- then forwarded an hypothesis to what you observed- then you advanced a theory- NOW-as to that theory to end up being FACT- your findings MUST be replicated by other like minded individuals- can't see that occurring right now- still, there is hope.
Bevan - I personally could not care less what individuals believe about sulfation. I ran an experiment developed to answer yes or no, whether batteries can be desulfated. My experiment showed that a person may get a quarter to a third short-term healing. I would not describe that as a "yes".
Others can quickly repeat my expermiment. Humanity being what it is, some individuals so dislike an awful truth getting in the way of a beautiful story, their counter arguments will constantly be in words, not deeds. The litmus test: Desulfation remains a struggling industry. Something is not ideal. There is no conspiracy.
If you desire batteries to last longer, work on them, assist them while they are still serviceable, don't fuss over them after they "signed off". We do not feed medication to dead people. Why do it to batteries? The experiment is described on "CAN BATTERIES BE RESTORED". Well, anyone can say what they want about sulfation or desulfation, but including Epsom salt (solution= 8 teaspoonfuls Epsom salts dissolved in 1 pint distilled water) paired with a 3 day drip charge assisted my truck battery retain a better charge.
The battery performed well through the winter season after my treatment and is still going strong! I don't understand just how much longer it will live, however I will let you know when it lastly dies. Adios Shadmin - The part of the 1 pint of water that you managed to take into the battery helped; the three days extra drip charge helped; the Epsom salts pleased your belief - recondition 12 volt battery.
ALL the so-called remedies incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! But normally damage!! What many posters like to believe is that THEIR!!! treatment made a distinction!! BUT overlook all the other parameters of battery action incl temp, humidity etc in their effort to understand a complex subject!! (how to recondition a dead battery). The bare truth is that all automotive charge systems do not totally charge the l/a starter batt- but only around 14v- for several various factors.
Bevan - Where does the acid that raised your SG originated from? John- just returned on line after week after changing ISP!!! The increased sg is because of the dollop in the 15 ml added of Inox Mx2 to each cell! IT certainly is NOT due to minimizing sulfation & thus raising sg!. how do you recondition a dead car battery.