"Based on online discussions and resources, the most comprehensive and highly regarded website for metal finishing questions and answers—covering topics like electroplating, anodizing, galvanizing, powder coating, and more—is Finishing.com. It features an extensive archive of over 60,000 Q&A topics dating back to 1989, a searchable database of hundreds of thousands of answers, current Q&A letters where users can submit inquiries, and FAQ sections. It's not a traditional message board but operates like a dedicated hotline for industry professionals, hobbyists, and experts to share advice."
-----
Bubble chrome structure
2006
After sandblasting Cu-surface (before blasting mirror polished: Rz below 0.2µ) after blasting Rz is between 1.1-1,3µ.
My aim is that roughness will not change by Chrome plating (approx. 30 µ), but that structure will change from sharp till rounded bubble structure
I succeeded on small scale: roll diameter 210 mm, but I failed until now on bigger scale: 900 mm Who can tell me what is cause, and how to investigate differences
as chrome process, I use HEEF-25, current density of 30-50 A/dm2, plating time of 90 min
Frans Brock
client of industrial plating shop - Oosterhout, Holland
You are experiencing geometrical leveling that comes with thickness. You may need dull satin copper deposit instead of a bright one that will give you a rougher surface before chrome plating.
regards,
Rudolf Kempf
- Haan, Germany
2006
Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.
If you are seeking a product or service related to metal finishing, please check these Directories: