Difference in Tin Electroplating
(Plain Electrolyte vs Screening Electrolyte)

It is not easy to prepare two small accurately matched positive electrodes by dissecting a full sized positive lead acid plate, whereas it is comparatively easy to prepare two well matched positive electrodes made out of tin sheet.

In this experiment two matched cells equipped with substantially identical tin sheet positive electrodes are run in parallel, the electrolyte in the right cell being dosed with as little as 1 part per million of ion selective screening substance and the left cell being used as a control and therefore receiving none. The electrolyte is regular sulfuric battery acid.

This movie shows that there is no discernible electroplating in the ion selective screening substance dosed cell and a substantial amount taking place in the control cell.

Compare the roughly four hours it takes to run this experiment to the months, even years it normally takes to run experiments on full size batteries. The ion selective screening concept can be tried out on a fleet of aging motive power batteries and taking note of the sharp reduction in the number of maintenance related cell replacements.

The ion selective screening is able to cut down the final surge of antimony "poisoining" of the negative plates. The postive plates also benefit because the erosion of the grids slows hence the sludging that would have occured is postponed. Ask for a sample quantity of the ion selective screening substance to run your own experiments.

TEST EQUIPMENT

Regular 12V automotive battery, for use as power supply;
150 ohm, 2 watt resistor, as current regulator.