Electro Polishing Process

Before electro polishing, each component undergoes a thorough cleaning to remove grease, oil, and particulate matter using:

• Alkaline detergents
• Solvent degreasers
• Ultrasonic agitation (for delicate parts)

This step ensures that no organic residue interferes with the electrochemical reaction.

Cleaned components are rinsed with deionized or RO water to neutralize the cleaning agents.

For certain alloys or heavily oxidized surfaces, chemical activation may be done to ensure uniform current distribution during electro polishing.

Core Process – Here’s how it works:

• Components are suspended in specially designed fixtures or jigs.
• Submerged in an acid-based electrolyte (typically phosphoric-sulfuric blend).
• Direct current (DC) is applied: the part acts as the anode (+), and a cathode (-) completes the circuit.
• High points on the surface dissolve faster, resulting in a microscopically smooth, bright finish.

Controlled Parameters:

• Voltage & current density
• Temperature of the bath
• Immersion time
• Agitation & electrolyte flow

Immediately after electro polishing, parts are rinsed to halt the electrochemical reaction and remove residual acids.

A mild alkaline solution is used to neutralize acidic traces and ensure safe handling.

• Final rinse with deionized water to eliminate any impurities.
• Components are air-dried or dried in hot chambers depending on part geometry.

• Visual Inspection for uniformity and gloss
• Surface Roughness Testing (Ra Values)
• Dimensional Check (if required)
• Surface Finish & Passivation Certificates issued upon request