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Bob Boyce on sanding the plates
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jksav7 Offline
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Bob Boyce on sanding the plates
Some of this is over my head, but interesting none the less.


"If your sanded half were in series with your unsanded half, then
there will be no difference in output, as the higher impedance of the
unsanded half limits the current flow through the sanded half.

Sanding does not increase hydroxy gas output per amp, it lowers the
voltage requirements of the cell to push a given current. So sanded
plate cells will flow more current at less voltage (less power). In
brute force DC, current flow dictates hydroxy gas output. The power
(voltage it takes to make that current flow) requirement is the
difference. The cells with the unsanded plates will have a higher
voltage accross them as compared to the cells that are sanded. This
shows that the sanded surface cells are more power efficient (due to
lower current density) than the unsanded. The purpuse of the sanding
is to lower impedance by greatly raising active surface area within a
given space. It makes the plates electrically larger without making
the plates physically larger.

The smallest surface area of any electrode set limits the current
flow of the entire set.

If you were to measure the temperature of each cell carefully, you
would also see that the sanded plate cells run slightly cooler than
the unsanded. This is due to the efficiency difference of current
density. Less power consumed means less heating of the cell.

You would need to take a used plate (kept submerged in distilled
water for preservation) to a lab and have the surfaces analyzed. You
may be suprised by the results ;-)

Bob"
06-20-2008 01:31 AM
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colchiro Offline
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Post: #2
RE: Bob Boyce on sanding the plates
Good info.

I made it a sticky.Wink

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
06-20-2008 04:27 AM
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76GP Offline
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Exclamation RE: Bob Boyce on sanding the plates
okay if I sand my plates is there a special way?like sand in one direction,x pattern and so on. I have a dule action sander will it work?(it a obitor sander)and how much sould I sand on them? lots or just rugh them up?Confused
06-20-2008 06:44 PM
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jksav7 Offline
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RE: Bob Boyce on sanding the plates
I believe sanding in the "x" pattern will work. I usually just sand in perpendicular (90 degree) anges to each other.

The sanding must be in a straight line (not orbital). The purpose is to rough-up the surface, so 36 grit or so sand paper works great.


76GP Wrote:okay if I sand my plates is there a special way?like sand in one direction,x pattern and so on. I have a dule action sander will it work?(it a obitor sander)and how much sould I sand on them? lots or just rugh them up?Confused
06-20-2008 09:23 PM
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