That is pretty common. The silliest thing you can do is to put all kinds of sulfates into batteries in the hope of solving an issue. Urban legends will never die. Pencil lead can include some weird compounds in addition to carbon (how to recondition a battery). There are plenty of carbon powder manufacturers. Automobile tires have to do with 50% carbon.
Does not cost an arm and a leg. Afdhal- I get cadmium from used NiCd cells-aaa or aa sizes- such as found in solar garden lights- after a couple of years they are thrown away as NiCd is broken- merely cut around leading crimp with hacksaw, unravel s/s case with cutter, withdraw contents- external foil is cadmium, inner foil is nickel, & some solid electrolyte & seperator- all wound in spiral pattern.
To acquire Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release toxic fumes- do outside -do not breathe vapours!!! When cadmium is entirely dissolved( & often the electrolyte cadmium mix is a lovely 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 reality- I got ta state the ONLY thing I utilized 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 need to be only lightly sulfated).
Still it is excellent at determining o/c cell/s in batt- pulses go up greater with degree of o/c! have actually seen 1250 volts! Cut open, & disintegrated pos grid! in 1 cell-others almost so!. how to restore a car battery. Bevan - I would suggest fine-tuning the cadmium by making the cadmium you recovered from the NiCds the positive in an electroplating cell.
Utilize a tin wire or solder wire negative. Power source can be 12V battery. Insert 220 ohm series resistor. The cadmium that gets plated onto the negative will be dendritic and pure. The actual voltage across the electroplating cell will be under 0. auto battery reconditioning. 5V. The green you explain would be nickel contamination.
Bevan - That's innovative! Why didn't I believe of 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 managed to find out what cadmium sulfate does. It definitely electroplates out onto the unfavorable grid metal when the battery is deliberately pushed into controlled overcharge.
This assists the lead sulfate nearest the grids to become active again and to be converted into lead and sulfate ions. Duplicated charging, releasing spreads the conductive environment slowly and progressively into the bulk of the lead sulfate. The process appears to have a limitation. automotive battery reconditioning. It would appear the secret to accomplishing 100% desulfation is to find out how to get conduction to spread out into 100% of the sulfate.
Including progressively more just develops dendrites and triggers shorts. The explanations offered by desulation merchants that insoluble sulfation inevitably coats the plates when batteries are utilized and that their treatment strips it away is pure dream. The sulfate stays right where it is. It is transformed. While both favorable and negative plates can become sulfated, the positive 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 negative grid?If so, would not just copper is good enough? Afdhal- it is simply John's theory- but i would state cadmium does not simply plate itself- needs 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 ideal.
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 prevents electroplating when a battery is standing. It is just when a battery is put on gassing charge that the voltage at the negative plate favors electroplating.
Copper has an electrochemical possible Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will merely 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, and so on are all far to unfavorable, the metals far too reactive in battery acid, for anything of benefit to happen.
Bevan - It is not a theory. I ran the experiments. Developed lead-acid cells in glass containers. I observed and determined (battery reconditioning equipment). John- to my knowledge, 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 become FACT- your findings MUST be replicated by other like minded persons- can't see that taking place right now- still, there is hope.
Bevan - I personally could not care less what people suggest about sulfation. I ran an experiment developed to answer yes or no, whether batteries can be desulfated. My experiment revealed that one might get a quarter to a 3rd short-term recovery. I would not describe that as a "yes".
Others can quickly repeat my expermiment. Humanity being what it is, some individuals so do not like an ugly fact getting in the way of a gorgeous story, their counter arguments will always remain in words, not deeds. The base test: Desulfation stays a struggling market. Something is not right. There is no conspiracy.
If you desire 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 individuals. 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 (service= 8 teaspoonfuls Epsom salts liquified in 1 pint pure water) coupled with a 3 day trickle charge helped my truck battery retain a much better charge.
The battery performed well through the winter after my treatment and is still going strong! I do not know how much longer it will live, however I will let you know when it lastly dies. Adios Shadmin - The portion of the 1 pint of water that you handled to put into the battery helped; the 3 days additional trickle charge helped; the Epsom salts satisfied your belief - is it okay to recondition a car battery with it still connected.
ALL the so-called treatments incl epson, alum, cadmium, etc, etc, etc advertisement infinitum not do anything!!! But generally hurt!! What numerous posters like to think is that THEIR!!! treatment made a difference!! BUT overlook all the other parameters of battery action incl temperature, humidity etc in their effort to understand a complex subject!! (car battery reconditioning). The bare truth is that all automotive charge systems do not fully charge the l/a starter batt- but just around 14v- for numerous various factors.
Bevan - Where does the acid that raised your SG originated from? John- just got back on line after week after changing ISP!!! The increased sg is due to the dollop in the 15 ml added of Inox Mx2 to each cell! IT definitely is NOT due to lowering sulfation & thus raising sg!. reconditioning a 12 volt truck battery.