Anodizing Rectifier
The anodizing rectifier (also known as an anodizing power supply or electrochemical oxidation rectifier) is a heavy-duty, high-precision, and fully adjustable DC/pulse power solution. It is specifically engineered for aluminum anodizing, hard coat anodizing, micro-arc oxidation (MAO), and advanced plasma chemical treatments.
The core function of this electrochemical oxidation rectifier is to deliver a highly stable and controllable voltage/current output. This precise regulation allows operators to control the oxide layer's growth velocity, film thickness, hardness, and overall structural uniformity, thereby guaranteeing industrial-grade surface quality. This advanced finishing power system is widely utilized across diverse aluminum alloy surface treatment lines, ceramic anodizing setups, electropolishing cells, and electrolytic coloring lines.
This intelligent power system features an automatic transition matrix to optimize film characteristics across different processing phases:
Automatic CV/CC Switching
- Initial Anodizing Phase: Operates in Constant Current (CC) mode to ensure rapid, uniform, and stable growth of the barrier and porous oxide layers.
- Late Anodizing Phase: Automatically switches to Constant Voltage (CV) mode to protect the workpiece, prevent thermal burning/pitting, and stabilize final film thickness.
Output Voltage & Current Profiles
- Standard Anodizing Configuration: Output ranges from 0–20V / 0–5000A and above.
- Hard Coat Anodizing Configuration: Output ranges from 0–60V / 0–3000A and above, providing the higher voltage required for high-density, wear-resistant coatings.
- Micro-Arc Oxidation Configuration: Specialized high-voltage pulse variants scaling up to 0–1000V.
This aluminum surface treatment hardware operates fundamentally on Faraday's Laws of Electrolysis, electromagnetic induction, and Ohm's Law. When the incoming Alternating Current (AC) flows through the internal heavy-duty isolation transformer, a stable induced electromotive force is generated in the secondary windings.
Utilizing the unidirectional conductivity of high-power semiconductor rectifying components—such as advanced thyristors (SCRs) or high-frequency IGBT modules—the system rectifies the raw AC into smooth, low-ripple Direct Current (DC). Simultaneously, the unit is integrated with a closed-loop digital feedback control matrix that monitors and adjusts electrical parameters in real-time, counteracting electrolyte resistance fluctuations and ensuring a flawless, uniform anodized finish.
