Battery hydration and sulfation

[kenner14]

Hydration and sulfation are similar-appearing conditions: a white deposit that can appear on the plates or case of the battery cell. What is the most likely cause for this condition?

A shortage of water, causing the hydrates to leach out of the plates.
An extended low-voltage condition.
Too much water in the cell, causing the plates to soften.
Over-equalizing the batteries.

[blicharski1989]

Hydration and sulfation are similar-appearing conditions: a white deposit that can appear on the plates or case of the battery cell. What is the most likely cause for this condition?

A shortage of water, causing the hydrates to leach out of the plates.
An extended low-voltage condition.
Too much water in the cell, causing the plates to soften.
Over-equalizing the batteries.

any tips???

[Steviep]

any tips???

good luck i will be taken my 3 as well on Monday.

[dhartmanpsfc]

An extended low voltage condition

[lhajek]

Hydration and sulfation are similar-appearing conditions: a white deposit that can appear on the plates or case of the battery cell. What is the most likely cause for this condition?

A shortage of water, causing the hydrates to leach out of the plates.
An extended low-voltage condition.
Too much water in the cell, causing the plates to soften.
Over-equalizing the batteries.

Extended low voltage condition causes the sulfation. That would be my answer.

[kenner14]

Extended low voltage condition causes the sulfation. That would be my answer.

sounds good thank you

[roberts311]

Hydration and sulfation are similar-appearing conditions: a white deposit that can appear on the plates or case of the battery cell. What is the most likely cause for this condition?

A shortage of water, causing the hydrates to leach out of the plates.
An extended low-voltage condition.
Too much water in the cell, causing the plates to soften.
Over-equalizing the batteries.

As the battery discharges, Sulfates (SO4) from the Sulfuric Acid electrolyte (H2SO4) and begin to build up on the lead plates (these are the white deposits that can appear). This increases the size of the plates (in extreme cases it could make the cell bulge outward), restricts flow of the electrolyte through the plate (making the battery cell less efficient at turning the chemical energy into electrical energy) and the electrolyte turns closer to water (this is why the specific gravity gets closer to 1.0 during discharge). An equalizing charge is the most effective way to drive those Sulfates that build up on the plate back into the electrolytic solution.

In a typical lead acid battery during discharge, the following equation applies:

Pb + PbO2 + 2H2SO4 yields 2PbSO4 + 2H2O + electrons


In a typical lead acid battery during charging, the equation works in the reverse order:

2PbSO4 + 2H2O + electrons yields Pb + PbO2 + 2H2SO4

Pb = lead cathode (-)
PbO2 = lead oxide anode (+)
H2SO4 = sulfuric acid
PbSO4 = lead sulfate
H2O = water