Micro-Arc Oxidation (MAO / PEO)

Micro-Arc Oxidation (MAO)
also known as Plasma Electrolytic Oxidation (PEO), is an advanced electrochemical surface treatment performed under high-voltage conditions.
Through localized micro-arc discharges, a ceramic-like, hard, porous, and strongly bonded oxide layer is formed directly on aluminum, magnesium, titanium, and their alloys.
Compared with conventional anodizing, MAO coatings offer significantly higher hardness, superior wear resistance, enhanced corrosion resistance, and excellent thermal stability, making them ideal for extreme and high-performance applications.
At Leedo Technology, we precisely control voltage waveforms, current density, electrolyte systems, processing time, and thermal management, ensuring stable coating structure, consistent performance, and mass-production capability.