That is pretty 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 strange compounds in addition to carbon (reconditioning a battery). There are lots of carbon powder makers. Car 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 couple of years they are thrown away as NiCd is worn out- merely cut around leading crimp with hacksaw, decipher 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 get Cadmium Sulphate, boil up some electrolyte- drop cadmium in- will bubble up & produce hazardous fumes- do outdoors -do not breathe vapours!!! When cadmium is entirely dissolved( & sometimes the electrolyte cadmium mix is a beautiful green, depending upon quality of cadmium from cell maker!)- task done! Got ta say- the mix I have actually contributed to batt cells does not appear to assist! In truth- I got ta say 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 confirm yes or no! Apart from that, the other thing is that the batt itself must be just gently sulfated).
Still it is great at recognizing o/c cell/s in batt- pulses increase greater with degree of o/c! have actually seen 1250 volts! Cut open, & disintegrated pos grid! in 1 cell-others practically so!. recondition 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 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 throughout the electroplating cell will be under 0. is it okay to recondition a car battery with it still connected. 5V. The green you explain would be nickel contamination.
Bevan - That's innovative! Why didn't I consider that prior to? I will attempt it. John - You're one wise gentleman, thanks for the details. Bevan - I believe I may have at long last handled to figure out what cadmium sulfate does. It absolutely electroplates out onto the negative grid metal when the battery is intentionally pressed into regulated 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 seems to have a limitation. reconditioning battery. It would appear the trick to achieving 100% desulfation is to find out how to get conduction to spread out into 100% of the sulfate.
Including gradually more simply produces dendrites and causes shorts. The explanations 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 negative plates can end up being sulfated, the positive sulfation merely reverses when the battery is charged.
John - If I comprehend you correctly, did you implied all the cadmium does is electroplating itself on the negative grid?If so, would not 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 a lot of! Afdhal - No, copper and copper sulfate are not suitable.
Cadmium has an electrochemical potential of -0. 4030V. Lead has an electrochemical capacity 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 potential Cu of +0. 5210V and Cu2 of +0. 3419V. Copper will just 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, sodium, and so on are all far to unfavorable, the metals far too reactive in battery acid, for anything of advantage to happen.
Bevan - It is not a theory. I ran the experiments. Built lead-acid cells in glass jars. I observed and determined (how to recondition an old battery). 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 end up being TRUTH- your findings MUST be replicated by other like minded persons- can't see that happening just yet- still, there is hope.
Bevan - I personally might not care less what individuals believe about sulfation. I ran an experiment developed to respond to yes or no, whether batteries can be desulfated. My experiment showed that one might get a quarter to a third short-term recovery. I would not explain that as a "yes".
Others can quickly duplicate my expermiment. Humanity being what it is, some individuals so dislike an awful truth getting in the way of a lovely story, their counter arguments will constantly remain in words, not deeds. The base test: Desulfation remains a struggling market. Something is not right. There is no conspiracy.
If you desire 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 individuals. Why do it to batteries? The experiment is described on "CAN BATTERIES BE BROUGHT BACK". Well, anybody can say what they want about sulfation or desulfation, but adding Epsom salt (option= 8 teaspoonfuls Epsom salts liquified in 1 pint distilled water) coupled with a 3 day drip charge assisted 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 just how much longer it will live, but I will let you know when it finally passes away. Adios Shadmin - The part of the 1 pint of water that you handled to put into the battery helped; the 3 days additional trickle charge assisted; the Epsom salts satisfied your belief - car battery reconditioning.
ALL the so-called treatments incl epson, alum, cadmium, etc, etc, etc ad infinitum not do anything!!! However typically harm!! What lots of 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 effort to make sense of a complex subject!! (how to recondition a dead car battery). The bare reality is that all automobile charge systems do not completely charge the l/a starter batt- but just around 14v- for numerous 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 due to the dollop in the 15 ml added of Inox Mx2 to each cell! IT certainly is NOT due to minimizing sulfation & therefore raising sg!. reconditioning a 12 volt truck battery.