Integrated Polishing System Symptoms
- Dark contamination remains after cleaning.
- Recessed areas look contaminated even when open surfaces are bright.
Troubleshooting
Contamination after green chromium-oxide polishing remains in recesses
After polishing with a traditional green chromium-oxide paste, dark hard-to-remove contamination may remain in recesses, pores, threads, or textured surfaces.
Likely causes
- Contamination from traditional green chromium-oxide paste remained in difficult geometry.
- The brush, thread or wheel carried too much compound into recesses.
- Cleaning was not matched to the geometry.
Checks
- Check recesses under magnification if needed.
- Confirm whether the contamination is compound, oxide, coating residue or casting contamination.
Recommended fixes
- Clean in a controlled way rather than increasing ultrasonic time aggressively.
- Review compound amount and tool access.
- Consider a cleaner LUXI route before coating-sensitive steps.
Prevention
- Avoid overloading small tools and recessed geometry with compound.
- Inspect contamination-prone zones before plating, PVD or decorative coating.