Plasma Electrolytic Oxidation

Plasma Electrolytic Oxidation (PEO)

In the plasma electrolytic oxidation method, a high voltage source is used to oxidize the surface of the samples. This method, which is mainly used to oxidize the surface of aluminum, magnesium and titanium alloys, produces a very hard oxide-ceramic layer with excellent abrasion and corrosion behavior. The general principles of this method are very similar to that of anodizing, with the difference that the improvement in corrosion and abrasion resistance is much more severe than the anodizing method and can be used for most metals, including the 2XXX aluminum series, which the anodizing method is not beneficial.

Mirab Sanat company manufactures the PEO coating devices in three different categories with different currents including: AC, DC and pulsed DC.  All changes in voltage and current in these devices are continuously monitored by the monitoring system of the device. The technical specifications of this product are given in the following table:

propertyPEO with pulse DCPEO with DC currentPEO with AC current
Current typePulsed DCDCAC
Current output voltage (V) -300 to +800 Volt200-800 200-800
Output frequency20-2000 Hz-30-55 Hz
Duty cycle:15-85%15-85%15-85%
output power (KW)101010
input current3 phase3 phase3 phase
380 Volt380 Volt380 Volt380 Volt
50/60 Hz50/60 Hz50/60 Hz50/60 Hz
current density (A)up to 10up to 10up to 10
pulse accuracy1 milisecond--
peo
Plasma Electrolytic Oxidation
peo

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