Letter 31081

Pretreatment oven oxidizes copper parts, then epoxy won't adhere  

++++

Recently we installed a new oven to preheat copper parts prior to coating with epoxy insulation. Typically we run the oven about 330 degrees F, and the parts are in the oven for 21-25 minutes. Since the installation of the new oven, we occassionally see a silver patina coat the bar during pre-heating, and this causes adhesion failure. When the cured epoxy insulation is pulled off, the silver color is evident on the backside of the insulation.

The entry and exit doors to the oven open every 7.5 min for approximately 30 seconds for parts to convey in and out. The oven interior is approximately 230 cy in volume. We have discussed introduction of an inert gas to the combustion process, but feel this would be ineffective and costly on an oven that is opened so frequently.

Elliott Phillips
Epoxy Coating - Greenwood, South Carolina


Dear Reader, please --

Answer or follow-up on this subject (in non-commercial fashion).
 
My company is a supporting advertiser at finishing.com and we want the contact information to reach the inquirer privately.
 
Post a new question or inquiry on a different subject.
 


Legal disclaimer boilerplate button

List of Directories
Jobshops Directory button Environmental Directory button Equipment Directory button Consultants Directory button Chemicals Directory button Test Directory button Help-Wanted Directory button About Advertising button Classifieds Directory button Booklist button

 

Link to Del.icio.us button Save This Page (why?)    -    Home    -    ©1995-2009 finishing.com