Monday, July 26, 2010

Powder coated epoxy paint reaction with mud?

i am an electrical engineer in Samsung , we are using cable trays that are epoxy powder coated , i need to know if these cable trays are splashed upon with drilling mud( contains seawater barite , bentonite for details please search on internet) , then will the powder coated epoxy paint be affected or not ?


Secondly is epoxy powder coated paint UV rays proof or not ,,,,please send material in any form





if possible write down some chemical reactions


nishchal.attri@gmail.comPowder coated epoxy paint reaction with mud?
There is no reason I can think of that anything in drilling mud would affect the epoxy. Bentonite is an associative thickener which is also used in the manufacture of paint including waterborne and since cans that contain waterborne paint are lined with epoxy, I know for a fact that bentonite won't cause a problem. As long as the epoxy is properly applied and thoroughly cross linked at the time the they come in contact with the drilling mud it should be ok.





One problem with epoxy is its UV stability. Epoxies are very photoreactive and are ok for use indoors or otherwise protected from sunlight but will yellow and photodegrade within a relatively short period of time if exposed to sunlight. The effects of photodegradation on an epoxy might be controllable with an antioxidant such as a hindered amine light stabilizer such as CIBA TINUVIN 292 but personally I have only ever tested such additives in alkyds and polyurethanes and it still probably won't be very good. My recommendation is an epoxy base coat and a good alaphatic urethane topcoat if you desire UV stability. Don't use an alkyd for a topcoat as alkyds readily hydrolyze and that's bad if water based drilling mud is used.

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