Custom MAO Rectifier is a professional high‑performance pulse rectifier exclusively developed for micro arc oxidation surface treatment. Moreover, it converts stable AC input into adjustable high‑frequency pulsed DC output to form dense, high‑hardness, corrosion‑resistant ceramic coatings on aluminum, magnesium, titanium and various alloy workpieces. In addition, different from ordinary industrial rectifiers, the Custom MAO Rectifier supports full personalized parameter tuning to match diverse MAO process standards. Furthermore, it maintains ultra‑stable output during long‑cycle oxidation reactions, effectively improving coating uniformity, insulation performance and overall surface finishing quality. As a result, widely adopted for laboratory R&D and mass industrial production, this customized rectifier serves high‑standard fields including aerospace, medical equipment and deep‑sea precision components.
The Custom MAO Rectifier acts as the core process equipment that determines the film forming effect of micro arc oxidation. Therefore, its precise pulse control and stable output directly optimize reaction efficiency and finished product consistency. Its core process advantages are reflected in the following aspects:
Notably, GAOHUI provides complete series of Custom MAO Rectifier models, covering air‑cooled small experimental types and water‑cooled high‑power industrial types. Accordingly, all standard models support secondary customization to meet special process demands.
| Single Pulse | ||||||
| No. | Model | Forward Current (A) | Forward Voltage (V) | Input Voltage (V) | Cooling Method | W×L×H (mm) |
| 1 | 5A750V | 5 | 750 | 220 | Air-cooled | 290×520×190 |
| 2 | 10A750V | 10 | 750 | 380 | Air-cooled | 510×560×230 |
| 3 | 20A750V | 20 | 750 | 380 | Air-cooled | 560×760×320 |
| 4 | 30A750V | 30 | 750 | 380 | Air-cooled | 560×760×320 |
| 5 | 50A750V | 50 | 750 | 380 | Air-cooled | 520×580×930 |
| 6 | 100A750V | 100 | 750 | 380 | Air-cooled | 580×650×1650 |
| 7 | 200A750V | 200 | 750 | 380 | Water-cooled | 850×1130×1630 |
| 8 | 300A750V | 300 | 750 | 380 | Water-cooled | 800×1270×1700 |
| 9 | 500A750V | 500 | 750 | 380 | Water-cooled | 800×1270×1900 |
| Dual Pulse | ||||||||
| No. | Model | Forward Current (A) | Forward Voltage (V) | Reverse Current (A) | Reverse Voltage (V) | Input Voltage (V) | Cooling Method | Dimensions (mm) |
| 1 | 10A750V | 10 | 750 | 3 | 300 | 380 | Air-cooled | 510×560×230 |
| 2 | 30A750V | 30 | 750 | 10 | 300 | 380 | Air-cooled | 560×760×320 |
| 3 | 50A750V | 50 | 750 | 15 | 300 | 380 | Air-cooled | 520×580×930 |
| 4 | 100A750V | 100 | 750 | 30 | 300 | 380 | Air-cooled | 580×650×1650 |
| 5 | 200A750V | 200 | 750 | 50 | 300 | 380 | Water-cooled | 850×1130×1630 |
| 6 | 300A750V | 300 | 750 | 100 | 300 | 380 | Water-cooled | 800×1270×1700 |
| 7 | 500A750V | 500 | 750 | 150 | 300 | 380 | Water-cooled | 800×1270×1900 |
Power（KW） = Output Voltage（V） × Output Current（A）
The product comes with a one-year warranty and boasts a service life of over 10 years. It supports both Constant Current and Constant Voltage modes, and it also includes a programmable ramp-up function for current or voltage settings. For time-sensitive applications, you can use the timed operation mode. Moreover, the multi-segment function allows you to vary constant current or voltage levels over time. The device further offers an RS485 communication interface, automatic polarity reversal, and a minute-level timing function. If you need customization, please contact us for further details.
Over all, GAOHUI provides complete single-pulse and dual-pulse models with air-cooled and water-cooled options. Accordingly, these units fit different production scales and process requirements.
Shows the peak voltage of the current pulse, a key parameter affecting coating strength.
Displays the average current over the working cycle to monitor reaction stability.
Set total time: Total process duration.
Total running time: Elapsed working time.
Cumulative ampere-minutes: Total current-time value for coating thickness control.
Multi-station ID for managing different workpiece processes.
Indicates disconnection from remote/host system, local control mode.
Constant current mode, the most common for micro-arc oxidation.
Press to immediately terminate the oxidation process.
Process stage: Current running step in multi-step program.
Ramp-up time: Time for voltage/current to rise to set value, avoiding impact.
Peak voltage limit: Maximum pulse voltage to prevent breakdown.
Frequency (Hz): Pulse working frequency, affects coating density.
Current stage: Current process segment number.
Hold time: Duration of current segment.
Average current setting: Target average current value.
Pulse "on" time percentage in one cycle, affects heat input and coating structure.
Button to start or stop the process.
Toggle between CV and CC control modes.
Pause or resume the ongoing process.
Access multi-step program editor for complex recipes.
Choose between single segment or multi-segment process.
Shows currently loaded/running process recipe.
Opens system configuration menu.
Manufacturer/support contact information.
View historical voltage/current trend graphs.
Visualizes real-time/historical voltage/current curve.
Displays the peak current value of the pulse.
Displays the average voltage over the working cycle.
Shows system date and time.
Shows the peak value of the positive pulse voltage.
Displays the average current of the positive pulse over the working cycle.
Shows the average voltage of the positive pulse over the working cycle.
Displays the peak value of the positive pulse current.
Shows the current running process number.
Sets the time for voltage/current to rise slowly from zero to the set value.
Shows the current running segment number in multi-stage processes.
Sets the duration for the current process segment.
Manufacturer/support contact information.
Shows the average voltage of the negative pulse over the working cycle.
Displays the peak value of the negative pulse current.
Shows the peak value of the negative pulse voltage.
Displays the average current of the negative pulse over the working cycle.
Sets the maximum allowed positive pulse voltage to prevent workpiece breakdown.
Sets the target average current value for the positive pulse.
Set total time: Total process duration.
Total running time: Elapsed working time.
Cumulative ampere-minutes: Total current-time value for coating thickness control.
Opens the system configuration menu.
Accesses the multi-step program editor to create complex recipes.
Selects between running a single segment or a multi-segment process.
Displays the currently loaded or running process recipe.
Temporarily pauses or resumes the ongoing process.
Toggles between constant voltage and constant current control modes.
Multi-station ID for managing different workpiece processes.
Indicates disconnection from the remote/host system, local control mode.
Current operating mode: constant current control.
Press to immediately terminate the oxidation process.
Positive: Pulse frequency, duty cycle, number of pulses.
Negative: Pulse frequency, duty cycle, number of pulses.
Main button to start or stop the entire process.
For instance, by adjusting pulse frequency, duty cycle and voltage parameters, the Custom MAO Rectifier enables diversified decorative and functional color coatings on aluminum, magnesium and titanium alloys. In turn, it supports multiple color finishes to unify surface aesthetics and anti‑corrosion performance for finished workpieces.
| Color | Aluminum Alloy | Magnesium Alloy | Titanium Alloy |
| Black | ✔ | ✔ | ✔ |
| White | ✔ | ✔ | ✔ |
| Blue | ✔ | - | ✔ |
| Obsidian Blue | - | - | ✔ |
| Clear Blue | - | - | ✔ |
| Yellow | ✔ | ✔ | ✔ |
| Champagne | - | ✔ | - |
| Bronze | - | ✔ | ✔ |
| Green | - | - | ✔ |
| Purple | ✔ | - | - |
First of all, the Custom MAO Rectifier supports unipolar pulse, bipolar pulse and adjustable pulse modes. As a result, it flexibly matches micro arc oxidation processes of different alloy materials, solving the problem of single process limitation of ordinary rectifiers.
Furthermore, the industrial‑grade Custom MAO Rectifier adopts optional dustproof, waterproof and anti‑corrosion structures. Consequently, it operates stably in high‑dust and humid factory environments and greatly reduces equipment failure and maintenance frequency.
In addition, built‑in overcurrent, overvoltage, overheat and phase loss protection systems enable the Custom MAO Rectifier to automatically cut off output under abnormal conditions. In this way, it effectively protects the rectifier body and workpieces to ensure safe and uninterrupted production.
Likewise, standard RS485 communication enables remote real‑time monitoring, parameter adjustment and data recording. Therefore, the Custom MAO Rectifier supports automated line docking, improving overall production intelligence level.
Apart from functional advantages, adopting high‑quality industrial core components, the Custom MAO Rectifier features stable circuit performance and strong anti‑interference ability. Accordingly, it achieves long‑term reliable operation and lowers equipment replacement costs.
Compared with competing products on market, GAOHUI customized Custom MAO Rectifier delivers tangible benefits for labs and manufacturers:
Global Technical Support: Finally, GAOHUI provides 24/7 professional technical consultation and after‑sales service, ensuring stable operation of every customized rectifier worldwide.
Ultra‑Stable Output: Specifically, the Custom MAO Rectifier eliminates power fluctuation interference, ensuring uniform ceramic film thickness and consistent surface quality for every batch of workpieces.
High Energy Efficiency: Moreover, optimized high‑frequency circuit design reduces invalid power loss, helping enterprises save long‑term electricity costs in continuous MAO production.
User‑Friendly Operation: Meanwhile, equipped with an intuitive PLC touch screen and programmable multi‑step processes, the Custom MAO Rectifier lowers operation thresholds and shortens staff training cycles.
Full Customization Flexibility: Besides, all voltage, current, pulse parameters and structural forms of the Custom MAO Rectifier can be customized to fit unique laboratory experiments and industrial production standards.
To sum up, the high‑performance Custom MAO Rectifier is widely used for precision surface treatment of aluminum, magnesium, titanium and alloy components. Specifically, it covers multiple high‑end industrial fields:
Above all, with 27+ years of professional experience in surface treatment rectifier manufacturing, GAOHUI focuses on customized MAO rectifier solutions. Furthermore, all Custom MAO Rectifier products pass strict factory testing and hold ISO and CE certifications to meet international industrial standards. In addition, we cover a full power range from 5A to 1000A, supporting personalized adjustment of cooling mode, pulse parameters and control functions. Consequently, from scheme design and production to global delivery and lifelong maintenance, we provide one‑stop service to help customers improve coating quality and reduce production costs.
If you need exclusive Custom MAO Rectifier configuration for your micro arc oxidation process, please contact our team for professional customized solutions.
Learn more about related products:Plasma Oxidation Rectifier
A: Products with the same nominal specifications often serve different industries, and they may carry different detailed parameter requirements. These differences directly affect production costs and technical solutions, so final prices will vary accordingly. For this reason, we recommend you contact us directly to receive a precise and tailored quotation.
A: We assign specialized consultants to support each industry sector. If you need further information, simply reach out to us. After we confirm your request, we will immediately send you the full technical datasheets and product images you need.
A: We focus on custom non-standard industrial power supplies, so we can fully adjust output current and voltage to match your exact needs. The products shown on our website only represent part of our actual range, as we do not list every model online. If you cannot find your desired specifications, please contact us directly. We will work with you to confirm your exact requirements, or we can guide you to select the most suitable parameters based on your industry standards. We will provide complete technical specifications and dimension drawings so you can fully understand the product.
