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

-----

Powdercoat outcasting

I have metal stall fronts that have been galvanized. My powdercoater has informed me that the powdercoat finish is outcasting. We tried to have the galvanize sandblasted, and they were unable to remove all of the galvanize. What type of galvanize would cause this problem, and how do I get it removed?

Jacquie Kindred
farm - Martins Creek, Pennsylvania, USA
2004

I think the word you are looking for is actually 'outgassing'. It means that as the part is baked, air/gas/water vapor that are in the small porosities of the finish expand and blow holes in the finish, something like what you see when you make pancakes. However, I'm not sure that that is really the problem you and your powdercoater are having. It sounds more like you need a powder coater who can chemically strip the rest of the galvanized finish and apply a proper precoat, or apply a precoat that is compatible with both the exposed steel and the remaining galvanized finish.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
2004

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: