Micro-Arc Oxidation (MAO) Coatings on Aluminum Lock Plug Rotors
Engineering Overview: Technical analysis of Micro-Arc Oxidation (plasma electrolytic oxidation) on 7075 aluminum cylinder plugs, creating an ultra-hard 1500 HV ceramic layer.
Technical & Engineering Specifications
| Process | Micro-Arc Oxidation (Plasma Electrolytic Ceramic PEO) |
|---|---|
| Corrosion | ASTM B117 > 1000 Hours |
| Substrate | 7075-T6 High-Strength Aluminum Alloy |
| Ceramic Hardness | 1500 HV Surface Hardness |
| Dielectric Strength | > 10 kV/mm Electrical Insulation |
Plasma Electrolytic Ceramic Coating
Micro-Arc Oxidation (MAO / PEO) transforms the surface of lightweight aerospace-grade 7075-T6 aluminum lock plugs into an ultra-dense crystalline ceramic layer ($Al_2O_3$).
Ceramic Performance
- Micro-Hardness: Reaches 1400 to 1600 HV (75 HRC), matching tungsten carbide.
- Weight Savings: Provides the lightness of aluminum ($2.7\text{ g/cm}^3$) with 3x the hardness of solid brass.
- Application: Cleanroom locks, aerospace doors, and military equipment.
Frequently Asked Engineering & Selection Questions
Q1: What is Micro-Arc Oxidation (MAO) on aluminum lock parts?
A high-voltage plasma process that converts aluminum into an ultra-hard (1500 HV) ceramic surface that resists severe abrasive wear.