Electro-abrasive polishing is a method of adding current density of 0.1A/cm2 order, while abrasive polishing under pressure of 5`20kPa.

At this current density, electrolytic dissolution does't occur because of thick passive oxide layer, therefore surface roughness hardly improve.
At this time passing abrasive remove passive oxide layer, then it occurs
high efficiency electrolytic dissolution.(fig-3)

By passing abrasive on convex part, electrolytic dissolution increases at convex part, on the other, concave part remain unprocessed.
Then surface roughness is improved rapidly.

Rotating disk type tool is used for flat or curved suface of work.
Oscar type polisher is used for high flat suface besides high surface
roughness.

In case of small size circular cylinder, tool is given piston motion
addition to rotating(fig-6)

By Electro-abrasive polishing, you can get mirror surface of 3`5
nmRa level from milling surface of 2`3mRy in several minutes.

In case of settling of good condition, super mirror suface of 1nmRa(0.001mRajcan be obtained.

Next page shows some example of data by Electro-abrasive polishing
for a flat plate and inside of a pipe.

TOP PAGE PRINCIPLE OF
ELECTRO- POLISHING
ELECTRO-
ABRASIVE POLISHING
RESULTS OF
ELECTRO-ABRASIVE POLISHING
HIGH SPEED ELECTRO-
POLISHING
COMPARISON
OF ELECTRO- POLISHING
SOLUTION TO PROBLEM OUTLINE OF COMPANY
fig-4@Electro-abrasive Polishing for curved suface@ 

New Electropolishing -1-
"Electro-abrasive Polishing"
-nano meter level mirror surface-

several hundred rpm

nozzle

abrasive

abrasive

electrolytic solution

holding down force

rotation

electrolytic solution

tool electrode

polishing pad

movement

viscoelastic suspension

rubber plate

copper plate

electrolytic dissolution

electrolytic solution

fig-5 Polishing with Oscar type Polisher

guide plate

insulator

surface plate

fig-3 Principle of Electro-abrasive Polishing

abrasive

Results of Electro-abrasive Polishin

work

work@holder

pipe

work

work

work piece

passive oxide layer

fig-6@Electro-abrasive Polishing
for inside of small pipe