Epoxy coating resin application


Epoxy coating resin application
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Maria Julia Ferreira
Maria Julia Ferreira
Maria Julia Ferreira
posted 9 Years Ago HOT
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Hello,
I'm trying to apply an epoxy coating resin (bisphenol A epoxy resin) onto mild steel, with a bar coat of 100 micra. The resin to hardener ratio is 2:1.
When the surface begin drying some defects appear as the photo show. The surface preparation was done according to  ASTM- G1- 03, and I tried to repeat the process with a bar coat of 200 micra and the result was the same. 
What is wrong? 
Can you help me?
Many thanks
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Edited 9 Years Ago by Maria Julia Ferreira
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Epoxy coating resin application
Maria Julia Ferreira - 9 Years Ago
     From the photo it looks like the resin has "fish-eyed" off the surface due to the surface being...
Warren (Staff) - 9 Years Ago
     Thank you very much for your answer. But I have another doubt about the process: How much time...
Maria Julia Ferreira - 9 Years Ago
     I agree with Warren. What is the application? I'm assuming something for corrosion testing if you...
Hanaldo - 9 Years Ago
     Thank you for your suggestions. In fact, we are using this resin for anticorrosive tests. According...
Maria Julia Ferreira - 9 Years Ago
     My guess is you still have some form of contaminant / release agent / protective coating on the...
ChrisR - 9 Years Ago
     Thank Chris for your contribution. Anyway I hadit inconsideration regardingthe pre-treatment ofASTM...
Maria Julia Ferreira - 9 Years Ago
             If the substrate is prepared correcting with no contaminants and it has been etched correctly then...
ChrisR - 9 Years Ago
     Even the slightest trace of grease could cause that problem. Also if the surface is too smooth it...
Warren (Staff) - 9 Years Ago

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