Originally Posted by
phil alvirez
corrosion is another factor that greatly influences the life of a battery.
but again, there is something about the name, that makes things confusing.
corrosion is a chemical reaction to store electricity. is really oxidization of the positive plate grid surface.
but applying 2.37 v per cell (14.22 v for 12 v battery) charges satisfactorily the battery, and at this voltage, real corrosion is barely noticeable.
That is not accurate, you either edited too much from the article you (apparently) took this from, or your source is incomplete. You did not explain the difference between corrosion of the plate versus grid.
conclusions:
Battery industry sources are unanimous when they say that on average, 30% of automobile-type batteries end up sulfated. and sulfation, they always point out, is caused by neglect.
On the other hand, desulfation product makers insist it is the other way around, and sulfation naturally builds up in batteries over time (but many can only vaguely discuss how batteries work).
I think they are referring to YOU, here, Phil.
They describe corrosion as more of an incidental mechanical defect, and usually treat batteries by charging the affected batteries, followed by pulsing in one form or another. This is simply modified, boosted equalization charging called by another name.
Sulfation is a term that came into use during the early days of the lead-acid battery. The meaning of the word has expanded to imply authority to include and justify every conceivable reason for the eventual performance deterioration and failure of lead-acid batteries. However.......
Lead-acid batteries that receive the best possible care, are brought to full state-of-charge regularly, consistently last the longest
(eventually wear outas result of the effects of positive grid corrosion).
Lead-acid batteries that, for a large variety of different reasons, are consistently undercharged, are not brought to full state-of-charge regularly fail prematurelyas result of the effects of sulfation.
Ok, fine. So now explain to the reader why you copied and pasted this text, and explain what you are trying to 'teach'.
While you are at it, the italic text appears to be an attempt to post a complete thought - but the 'sentence', is not a complete thought and tends to be self-contradictory; you state (or the source you tried to copy from) that batteries brought to full charge regularly last the longest, but then you add the grammatically incomplete test in parenthesis. Why? What is your point?
considering the great interest on this important subject, by the number of views (and few posts) any1 wishing to get more details or ask questions without risking to be ridiculed, click on my name at the upper left corner, then click on "send a private message to phil alvirez" and we will have an adult conversation.
1) The lack of posts is due to a lack of content, it is apparent you are copying text you don't understand and (in some cases) citing it as your own, which can lead to you being banned. It is clear you are not proofreading what you post, as it is very hard to follow.
2) We can't have an adult conversation on a complex topic of technology when the leader of that conversation does not understand what he is presenting, and who cannot post text that is understandable and cited for source.
3) At least copy and paste the entire text, that would make it easier.
4)
It is a violation of copyright and "fair use" guidelines to post text without citing a source - you are on thin ground. Knock it off.
As an example of citing a source, here is a rather good exposition on "corrosion" at is applies to what you are taking from other sources:
From: https://batteryvitamin.net/understanding_corrosion
Corrosion of the positive electrodes occurs in all lead-acid batteries. If it did not, the lead-acid concept would not work. The very earliest lead-acid battery cells were made by immersion of two lead sheets in dilute sulfuric acid. The cells were charged by applying a voltage sufficient to turn the lead on the surface of the positive electrodes into lead dioxide - and causing hydrogen gas to be released at the negatives.
One way to describe what happens is that the positives are being oxidized. Another way to describe what happens is that the positives are being corroded.
It is roughly analogous to iron being turned into rust. In the lead-acid battery, the "rusting" is what happens during charging and is necessary and beneficial because this is what brings life to the positive plate active material and is where, for all intents and purposes, 100% of the power is stored in a battery. When too much charging is forced into a battery, however, it affects the positive grids, which is a bad thing.
The early lead electrodes evolved into positive and negative plates, with grids containing active materials. Charged battery cells have lead dioxide positive active material and spongy lead negative active material, both of which are converted into lead sulfate upon discharge and back to lead dioxide and spongy lead upon recharging.
Oxidization/ corrosion of the positive plate grid surface is not a straightforward process. The formation of lead dioxide initially takes place rapidly, forming a layer that passivates the surfaces. This effect is very powerful on titanium, stainless steel and aluminum, less so on lead. After this layer of oxide has been established, the rate of corrosion abruptly falls almost to zero. This corresponds to a transition voltage or potential known as the Flade potential. The voltage applied to a lead electrode can be raised without any increase in the rate of corrosion - up to a point. Thereafter, increasing the voltage increases the rate of corrosion. The lead-acid battery is preferably operated across this voltage range of very low corrosion although, for practical reasons, this is not possible 100% of the time.