Overview of MicroPoly ECD-ECP Process
The MicroPoly ECD-ECP process is an electrolytic deburring and polishing method that uses a patented electrolyte, DC power supply, and industrial chiller to maintain a constant temperature. It removes metal from electrically charged parts, focusing on areas with higher electrical charges like burrs and sharp edges.

Specifications and Process Details
The electrolyte contains Ethylene Glycol, which increases resistance and slows ion movement, crucial for controlled metal removal. This results in metal hydroxide sludge formation, requiring water replenishment due to the hygroscopic nature of the electrolyte.

Applications
The process is suitable for deburring various metals but not non-conductors like plastics or ceramics. It does not affect silicon or carbon due to high energy requirements. It can improve the surface of stainless steel by removing ferric components, enhancing corrosion resistance and surface finish.

Process Development
Developing the MicroPoly process involves understanding electrical fields and ion transport. The process window is large, allowing flexibility in variable adjustments. Key objectives include determining process parameters, current and time requirements, and achieving a large process window.

Operational Parameters
Line speed and current are directly proportional to metal removal. Voltage affects the appearance of processed parts, with specific ranges for different materials. Operating temperature influences selectivity, with lower temperatures favoring burr removal with minimal base material loss.

Maintenance and Safety
The electrolyte is slightly acidic and safe to handle with precautions. It can cause corrosion on most metals except passivated stainless steel and titanium. Maintenance involves ensuring compatibility of materials in contact with the electrolyte to prevent galvanic corrosion.

Corrosion Prevention
To prevent metal corrosion when stainless steel or titanium is not an option, apply a strongly adhering insulative coating such as epoxy-filled paint, powder coatings, plastisol, or plasti-dip. Ensure that the electrolyte does not seep under the coating.

Electrolyte pH
The pH level should be maintained between 5.8 and 6.8. A pH higher than 6.8 reduces polishing effectiveness and causes an ammonia smell. Adjust pH by adding nitric acid to lower it or ammonium hydroxide to raise it.

Electrolyte Conductivity
Conductivity should be around 30 mS ± 5 mS at 20°C. High water content increases conductivity, which raises current draw and reduces process selectivity. Remove excess water by heating the electrolyte to 60-70°C for 4-8 hours.

Contact Information
For further inquiries, contact MICRO TECHNICA TECHNOLOGIES GmbH at Max-Planck-Str. 9, 70806 Kornwestheim, Tel: +49 (0)7154 8258-0, Fax: +49 (0)7154 8258-10, Email: [email protected], Web: http://www.micro-technica.de.