That is pretty common. The silliest thing you can do is to put all kinds of sulfates into batteries in the hope of fixing an issue. Urban myth will never ever die. Pencil lead can consist of some strange compounds in addition to carbon (recondition dead battery). There are plenty of carbon powder producers. Vehicle 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 couple of years they are tossed out as NiCd is broken- merely cut around top crimp with hacksaw, decipher s/s case with cutter, withdraw contents- outer foil is cadmium, inner foil is nickel, & some strong electrolyte & seperator- all injury in spiral pattern.
To get Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & produce poisonous fumes- do outdoors -do not breathe vapours!!! When cadmium is totally liquified( & in some cases the electrolyte cadmium mix is a lovely green, depending upon quality of cadmium from cell maker!)- job done! Got ta state- the mix I have actually added to batt cells does not appear to help! In fact- I got ta state the ONLY thing I utilized that worked was INOX MX2( in 1 batt up until now- I will get some more MX2 &try; & shot; in other batts to validate yes or no! Apart from that, the other thing is that the batt itself must be only gently sulfated).
Still it is proficient at determining o/c cell/s in batt- pulses increase higher with degree of o/c! have actually seen 1250 volts! Cut open, & disintegrated pos grid! in 1 cell-others nearly so!. auto battery reconditioning. Bevan - I would suggest refining the cadmium by making the cadmium you recovered from the NiCds the positive in an electroplating cell.
Utilize a tin wire or solder wire unfavorable. Power source can be 12V battery. Insert 220 ohm series resistor. The cadmium that gets plated onto the unfavorable will be dendritic and pure. The real voltage across the electroplating cell will be under 0. how to recondition a dead car battery. 5V. The green you explain would be nickel contamination.
Bevan - That's innovative! Why didn't I consider that before? I will attempt it. John - You're one wise gentleman, thanks for the information. Bevan - I think I might have at long last handled to find out what cadmium sulfate does. It absolutely electroplates out onto the unfavorable grid metal when the battery is intentionally pushed into controlled overcharge.
This assists the lead sulfate nearest the grids to become active once again and to be converted into lead and sulfate ions. Duplicated charging, releasing spreads the conductive environment gradually and progressively into the bulk of the lead sulfate. The procedure appears to have a limitation. reconditioning a battery. It would appear the trick to achieving 100% desulfation is to figure out how to get conduction to spread out into 100% of the sulfate.
Adding gradually more simply creates dendrites and causes shorts. The explanations offered by desulation merchants that insoluble sulfation inevitably coats the plates when batteries are used which their treatment strips it away is pure dream. The sulfate stays right where it is. It is converted. While both positive and negative plates can end up being sulfated, the favorable sulfation merely reverses when the battery is charged.
John - If I comprehend you properly, did you implied all the cadmium does is electroplating itself on the negative grid?If so, would not simply copper suffices? Afdhal- it is just John's theory- however i would say cadmium does not just plate itself- needs driving- so does copper- BUT copper is a non laster in H2SO4! As are most metals! Lead lasts longer than the majority of! Afdhal - No, copper and copper sulfate are not ideal.
Cadmium has an electrochemical potential of -0. 4030V. Lead has an electrochemical potential of -0. 1262V. The electrochemical potential of cadmium is such that it prevents 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 possible Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will just plate onto the negatives regardless and remain there, triggering the plates to gas and to self discharge and to sulfate. The electrochemical potentials of aluminum, magnesium, potassium, sodium, and so on are all far to negative, the metals far too reactive in battery acid, for anything of benefit to occur.
Bevan - It is not a theory. I ran the experiments. Developed lead-acid cells in glass jars. I observed and determined (reconditioning battery). John- to my knowledge, what you have done is an experiment- then forwarded an hypothesis to what you observed- then you advanced a theory- NOW-as to that theory to become REALITY- your findings MUST be duplicated by other like minded persons- can't see that happening right now- still, there is hope.
Bevan - I personally might not care less what individuals believe about sulfation. I ran an experiment created to address yes or no, whether batteries can be desulfated. My experiment showed that one might get a quarter to a third short-term healing. I would not describe that as a "yes".
Others can easily repeat my expermiment. Humanity being what it is, some people so dislike an ugly fact obstructing of a stunning story, their counter arguments will always remain in words, not deeds. The litmus test: Desulfation remains a having a hard time industry. Something is wrong. There is no conspiracy.
If you want batteries to last longer, deal with them, assist them while they are still serviceable, do not fuss over them after they "signed off". We do not feed medicine to dead people. Why do it to batteries? The experiment is explained on "CAN BATTERIES BE RESTORED". Well, anyone can state what they desire about sulfation or desulfation, however including Epsom salt (solution= 8 teaspoonfuls Epsom salts dissolved in 1 pint pure water) coupled with a 3 day drip charge helped my truck battery retain a much better charge.
The battery carried out well through the winter 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 handled to take into the battery helped; the three days extra trickle charge assisted; the Epsom salts satisfied your belief - is it okay to recondition a car battery with it still connected.
ALL the so-called solutions incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! But usually hurt!! What numerous posters like to believe is that THEIR!!! treatment made a difference!! BUT neglect all the other specifications of battery reaction incl temp, humidity etc in their attempt to make sense of a complex subject!! (how do you recondition a battery). The bare truth is that all automotive charge systems do not fully charge the l/a starter batt- but only around 14v- for several various factors.
Bevan - Where does the acid that raised your SG come from? John- simply got back on line after week after changing ISP!!! The increased sg is because of the dollop in the 15 ml included of Inox Mx2 to each cell! IT definitely is NOT due to minimizing sulfation & hence raising sg!. materials needed to recondition car battery.