Electropolishing & Passivation

Controlled edge smoothing and corrosion-resistance finishing for medical tube components.

Best Fit For:Quality and manufacturing engineers defining surface-finish acceptance criteria.

Capability Highlights

Program Metric	Typical Range	Procurement Value
Surface Roughness (Ra)	< 0.2 um	Supports lower friction and surface-condition targets when validated for the application.
Process standards	ASTM A967 passivation planning	Gives quality teams a concrete standard to place on drawings.
Inspection targets	Burr limit, edge rounding, material removal window	Prevents over-polishing while reducing recast and micro burrs.

Decision Factor	Confirm Before Quote	Buyer Impact
Finish objective	Burr removal, Ra reduction, passivation, corrosion resistance, or assembly friction target.	Prevents using electropolishing as a vague finishing term without acceptance criteria.
Dimensional sensitivity	Allowable material removal, wall thickness, slot bridge, ID/OD tolerance, and edge radius.	Avoids over-polishing parts that already sit near tight dimensional limits.
Inspection method	Visual magnification, roughness check, passivation standard, corrosion test, and report needs.	Connects the finish to measurable release evidence.

Over-polishing: Strict time/current density control and dimensional checks.
Unverified burr removal: Set visual magnification, burr limit, edge radius, and dimensional checks before finishing starts.

Pre-finish inspection: Review cut edge, burr, recast, wall thickness, and dimensional margin before processing.
Controlled finishing: Apply electropolishing and/or passivation with project-specific time, chemistry, and current controls.
Cleaning and neutralization: Use rinse, ultrasonic cleaning, drying, and handling controls appropriate to the component scope.
Final release: Inspect dimensions, edge condition, surface notes, and passivation or finish records before shipment.

Highly recommended for laser-cut parts to remove slag and burrs.

Yes. It removes material from exposed surfaces, so allowable material removal and CTQ dimensions should be confirmed before processing.

Inquiry Email

Best for drawings, tolerance tables, inspection needs, and quote history.

Instant Chat

+8618857971991

Fast path for OD/ID, material, sample quantity, and lead-time questions.

Program Evaluation Matrix

Program Metric	Typical Range	Procurement Value
Surface Roughness (Ra)	< 0.2 um	Supports lower friction and surface-condition targets when validated for the application.
Process standards	ASTM A967 passivation planning	Gives quality teams a concrete standard to place on drawings.
Inspection targets	Burr limit, edge rounding, material removal window	Prevents over-polishing while reducing recast and micro burrs.

Capability Selection Logic

Decision Factor	Confirm Before Quote	Buyer Impact
Finish objective	Burr removal, Ra reduction, passivation, corrosion resistance, or assembly friction target.	Prevents using electropolishing as a vague finishing term without acceptance criteria.
Dimensional sensitivity	Allowable material removal, wall thickness, slot bridge, ID/OD tolerance, and edge radius.	Avoids over-polishing parts that already sit near tight dimensional limits.
Inspection method	Visual magnification, roughness check, passivation standard, corrosion test, and report needs.	Connects the finish to measurable release evidence.

Process and Quality Flow

Pre-finish inspection: Review cut edge, burr, recast, wall thickness, and dimensional margin before processing.

Controlled finishing: Apply electropolishing and/or passivation with project-specific time, chemistry, and current controls.

Cleaning and neutralization: Use rinse, ultrasonic cleaning, drying, and handling controls appropriate to the component scope.

Final release: Inspect dimensions, edge condition, surface notes, and passivation or finish records before shipment.