That is quite common. The silliest thing you can do is to put all sort of sulfates into batteries in the hope of fixing a problem. Urban myth will never die. Pencil lead can consist of some odd substances in addition to carbon (recondition car battery for sale). There are plenty of carbon powder producers. Cars and truck tyres 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, unwind 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 obtain Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & offer off toxic fumes- do outside -do not breathe vapours!!! When cadmium is totally dissolved( & often the electrolyte cadmium mix is a charming green, depending on quality of cadmium from cell maker!)- job done! Got ta state- the mix I have 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; & try; in other batts to confirm yes or no! Apart from that, the other thing is that the batt itself must be only lightly sulfated).
Still it is proficient at determining o/c cell/s in batt- pulses increase greater with degree of o/c! have actually seen 1250 volts! Cut open, & broke down pos grid! in 1 cell-others nearly so!. materials needed to recondition car battery. Bevan - I would suggest improving the cadmium by making the cadmium you recovered from the NiCds the positive in an electroplating cell.
Use a tin wire or solder wire negative. Source of power can be 12V battery. Place 220 ohm series resistor. The cadmium that gets plated onto the negative will be dendritic and pure. The real voltage throughout the electroplating cell will be under 0. how to recondition a wore out battery. 5V. The green you describe would be nickel contamination.
Bevan - That's creative! Why didn't I think of that before? I will attempt it. John - You're one smart gentleman, thanks for the info. Bevan - I believe I might have at long last managed to find out what cadmium sulfate does. It absolutely electroplates out onto the unfavorable grid metal when the battery is intentionally pressed into controlled overcharge.
This helps the lead sulfate nearest the grids to become active again and to be transformed into lead and sulfate ions. Repeated charging, discharging spreads the conductive environment slowly and progressively into the bulk of the lead sulfate. The process appears to have a limitation. what is battery reconditioning. It would appear the trick to attaining 100% desulfation is to figure out how to get conduction to spread out into 100% of the sulfate.
Including gradually more just creates dendrites and triggers shorts. The descriptions offered by desulation merchants that insoluble sulfation undoubtedly coats the plates when batteries are utilized and that their treatment strips it away is pure dream. The sulfate remains right where it is. It is converted. While both favorable and unfavorable plates can become sulfated, the positive sulfation just reverses when the battery is charged.
John - If I understand you properly, did you meant all the cadmium does is electroplating itself on the negative grid?If so, would not just copper suffices? 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 many! Afdhal - No, copper and copper sulfate are not suitable.
Cadmium has an electrochemical capacity 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 negative plate favors electroplating.
Copper has an electrochemical potential Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will merely plate onto the negatives regardless and stay there, causing the plates to gas and to self discharge and to sulfate. The electrochemical potentials of aluminum, magnesium, potassium, sodium, etc. 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 (recondition your old 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 end up being REALITY- your findings MUST be reproduced by other like minded persons- can't see that happening right now- still, there is hope.
Bevan - I personally might not care less what people suggest about sulfation. I ran an experiment designed to answer yes or no, whether batteries can be desulfated. My experiment revealed that one may get a quarter to a 3rd short-term healing. I would not describe that as a "yes".
Others can easily repeat my expermiment. Humanity being what it is, some individuals so do not like an awful truth obstructing of a lovely story, their counter arguments will constantly be in words, not deeds. The litmus test: Desulfation stays a struggling industry. Something is wrong. There is no conspiracy.
If you want batteries to last longer, work on them, assist them while they are still functional, do not fuss over them after they "signed off". We do not feed medication to dead people. Why do it to batteries? The experiment is explained on "CAN BATTERIES BE RESTORED". Well, anyone can say what they want about sulfation or desulfation, but including Epsom salt (service= 8 teaspoonfuls Epsom salts liquified in 1 pint pure water) combined with a 3 day trickle charge helped my truck battery retain a better charge.
The battery performed well through the winter after my treatment and is still going strong! I do not know just how much longer it will live, however I will let you know when it finally passes away. Adios Shadmin - The portion of the 1 pint of water that you handled to take into the battery assisted; the three days additional trickle charge assisted; the Epsom salts satisfied your belief - reconditioning car battery.
ALL the so-called solutions incl epson, alum, cadmium, etc, etc, etc advertisement infinitum do NOTHING!!! However typically hurt!! What lots of posters like to think is that THEIR!!! treatment made a difference!! BUT ignore all the other parameters of battery reaction incl temperature, humidity etc in their effort to make sense of a complex subject!! (how to recondition a 12v battery). The bare truth is that all automobile charge systems do not fully charge the l/a starter batt- but just around 14v- for several various reasons.
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 because of the dollop in the 15 ml added of Inox Mx2 to each cell! IT absolutely is NOT due to reducing sulfation & hence raising sg!. reconditioning a 12 volt truck battery.