-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

topic 9475

Film Loss from Weathering


I have been recently asked how much film loss, in microns or mils, typically occurs per year when a Bis phenol A epoxy powder coating cured with dicydiamide is subjected to South Florida or accelerated UV/weathering exposure.

Charles Danick
Eastman Chemical - Niceville, Florida, USA


Dear Charles,

There is no definite answer to your question. There are so many factors that will affect how long the epoxy takes to degrade, such as formulation,type of epoxy and color. The major disadvantage of an epoxy powder coating no matter how it is cured is there tendency to lose gloss (i.e. chalking) however so far as corrosion protection is concerned, the film loss from chalking is not sufficient to cause a problem under normal conditions. Saying this I would not recommend this type of powder coating for out door use.

Hope this helps,

Drew Devlin
- Lincolnshire

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.