Electropolishing Services

Processing Overview

Description: Electropolishing involves placing the part as the anode in an electrolyte (a mixture of phosphoric acid and sulfuric acid) and applying a direct current to remove trace surface metal, achieving a roughness of Ra 0.1-0.4μm. The process includes pre-cleaning, electrolysis (voltage 5-15V, 5-30 minutes), and neutralization cleaning to remove burrs and oxide layers.

Applicable Materials: Stainless steel, aluminum, copper, titanium, and their alloys.

Visual Appearance: A smooth, high-gloss surface with a subtle shimmer or mirror effect that enhances metallic luster.

• Ultra-smooth Surface: Removes microburrs, reduces roughness by 50-90%, and improves cleanliness.
• Excellent Corrosion Resistance: Smooth surface reduces corrosion spots and extends part life (up to 10-15 years).
• Stress Relief: The electrolysis process releases residual stress, improving fatigue performance.
• No Mechanical Damage: Contactless polishing maintains tolerances and geometry.
• High Hygiene: The smooth surface is easy to clean, making it suitable for medical and food equipment.
• Environmentally Friendly Option: Wastewater can be recycled to reduce pollution.

• Electrolyte Management: Use a phosphoric acid/sulfuric acid mixture, control temperature (40-60°C), and test for corrosion susceptibility.
• Voltage Control: Use 5-15V to avoid over-corrosion and monitor current density (0.5-2A/cm²).
• Part Fixturing: Ensure uniform immersion and a void localized over-polishing; plan hook positions.
• Design Considerations: Avoid deep or blind holes, which can affect electrolysis uniformity. Quality Standards: Comply with ASTM B912 or ISO 15730, checking Ra values ​​and gloss.
• Safety Measures: Wear protective clothing and gloves when handling acidic wastewater, and comply with environmental regulations.

FAQ