No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Chromating and anodizing defects

2003

Case 1
Recently I had sent a batch of Al 2011 material to tumbling process after machining. After tumbling, I observed there is some residue penetration into the material (white colour). But residue was not able to be removed by the cleaning process, and then it was sent for Chromate Conversion Coating. But the result was not up to the expectation. The coating seem to be not uniform penetrate into the material. Obviously can see the aluminium surface in some area.

Case 2
Al 5083 was sent for clear anodizing. After treatment, it seem to have burning mark along the part.An evaluation was carry out by removing the burning mark and re-treat once. The same result was observed. Please advice. Thank You

Jonathan Sia
- Muar, Johor, Malaysia

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: