That is quite common. The silliest thing you can do is to put all type of sulfates into batteries in the hope of fixing an issue. Urban legends will never die. Pencil lead can consist of some unusual substances in addition to carbon (how to recondition a 12v battery). There are a lot of carbon powder makers. Cars and truck tires are about 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 few years they are thrown away as NiCd is worn out- 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 injury in spiral pattern.
To acquire Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & release poisonous fumes- do outdoors -do not breathe vapours!!! When cadmium is totally dissolved( & often the electrolyte cadmium mix is a lovely green, depending upon quality of cadmium from cell maker!)- task done! Got ta state- the mix I have included to batt cells does not seem to help! In truth- 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 confirm yes or no! Apart from that, the other thing is that the batt itself need to be just lightly sulfated).
Still it is proficient at determining o/c cell/s in batt- pulses go up greater with degree of o/c! have actually seen 1250 volts! Cut open, & broke down pos grid! in 1 cell-others almost so!. how do you recondition a dead battery. Bevan - I would recommend fine-tuning the cadmium by making the cadmium you recuperated from the NiCds the favorable in an electroplating cell.
Utilize 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 actual voltage throughout the electroplating cell will be under 0. reconditioning old battery. 5V. The green you explain would be nickel contamination.
Bevan - That's imaginative! Why didn't I think of that before? I will try it. John - You're one wise gentleman, thanks for the details. Bevan - I believe I might have at long last managed to determine what cadmium sulfate does. It certainly electroplates out onto the negative grid metal when the battery is intentionally pressed into controlled overcharge.
This helps the lead sulfate nearest the grids to end up being active once 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 seems to have a limit. how to restore a car battery. It would appear the trick to accomplishing 100% desulfation is to find out how to get conduction to spread out into 100% of the sulfate.
Including gradually more merely produces dendrites and causes shorts. The explanations provided by desulation merchants that insoluble sulfation undoubtedly coats the plates when batteries are utilized and that their treatment strips it away is pure fantasy. The sulfate stays right where it is. It is converted. While both positive and negative plates can become sulfated, the favorable sulfation simply reverses when the battery is charged.
John - If I comprehend you correctly, did you indicated all the cadmium does is electroplating itself on the negative grid?If so, wouldn't simply copper is excellent enough? Afdhal- it is simply John's theory- however 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 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 only when a battery is put on gassing charge that the voltage at the unfavorable plate favors electroplating.
Copper has an electrochemical possible Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will simply plate onto the negatives regardless and remain 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 negative, the metals far too reactive in battery acid, for anything of advantage to occur.
Bevan - It is not a theory. I ran the experiments. Developed lead-acid cells in glass jars. I observed and determined (high frequency battery reconditioning). 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 TRUTH- your findings MUST be reproduced by other like minded individuals- can't see that occurring simply yet- still, there is hope.
Bevan - I personally could not care less what people opine about sulfation. I ran an experiment designed 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 easily repeat my expermiment. Human nature being what it is, some people so dislike an unsightly reality getting in the way of a beautiful story, their counter arguments will always remain in words, not deeds. The litmus test: Desulfation remains a having a hard time market. Something is wrong. There is no conspiracy.
If you desire batteries to last longer, deal with them, help them while they are still serviceable, don't fuss over them after they "signed off". We do not feed medication to dead individuals. Why do it to batteries? The experiment is explained on "CAN BATTERIES BE RESTORED". Well, anybody can say what they want about sulfation or desulfation, however including Epsom salt (option= 8 teaspoonfuls Epsom salts dissolved in 1 pint distilled water) paired with a 3 day drip charge helped my truck battery keep a much better charge.
The battery performed well through the winter after my treatment and is still going strong! I don't understand how much longer it will live, however I will let you understand when it lastly passes away. Adios Shadmin - The portion of the 1 pint of water that you handled to take into the battery assisted; the 3 days additional trickle charge helped; the Epsom salts satisfied your belief - reconditioning battery.
ALL the so-called solutions incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! However normally damage!! What numerous posters like to believe is that THEIR!!! treatment made a difference!! BUT ignore all the other specifications of battery action incl temp, humidity etc in their effort to make sense of a complicated subject!! (recondition battery). The bare fact is that all automobile charge systems do not totally charge the l/a starter batt- but just around 14v- for several various reasons.
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 decreasing sulfation & hence raising sg!. diy recondition car battery.