lead sulfate

lead sulfate

[′led ′səl‚fāt]
(inorganic chemistry)
PbSO4 Poisonous white crystals melting at 1170°C; slightly soluble in hot water, insoluble in alcohol; used in storage batteries and as a paint pigment.
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More chromate ions dissolve out of the core, resulting in core-shell structures with a lead sulfate core and a chromium oxide shell.
It also modulates high-frequency pulses to break up and dissolve the naturally forming lead sulfate that builds on the battery plates.
but lead sulfate is more soluble than lead carbonate, which is in turn more soluble than lead phosphate.
The characteristic voltage of the creation of lead sulfate is about 2 V per cell, so by combining six cells you get a typical 12-V battery.
As a battery ages through use or through sitting unused for a long period of time, lead sulfate crystals enlarge and can build up excessively to the point that they create a physical barrier across the surface of the plate.
As typical lead-acid batteries age, or sit unused for long periods, lead sulfate crystals enlarge and can build up to the point they create a physical barrier on the surface of battery plates, until the battery can't accept or release energy.
Once the battery begins charging again, the lead sulfate dissolves back into solution.
Most of the dead batteries are unusable because the battery plates collect a lead sulfate buildup that prevents the battery from accepting a charge.
The current re-energizes and removes the lead sulfate deposits from the plates, then returns them to the battery acid as active electrolyte.
Therm-Chek RC 376P and Therm-Chek RC 377P are calcium-zinc powder stabilizers designed to replace tribasic lead sulfate on a part-for-part basis in general-purpose wire and cable-jacketing applications.
This experiment was conducted to test the ability of a commercial circuit to remove lead sulfate from a heavily sulfated lead-acid battery.