Bubbles, Pinholes

Apperance:

Many small pock-marks or tiny holes in the coating.

Probable Causes

  1. Excessive agitation, causing coating to foam, trapping gas or air bubbles.
  2. Excessive pumping or a leaking pump.
  3. Rapid evaporation of solvent.

Suggested Solutions

  1. Reduce agitation in tank and check pumping process
  2. Add small amount of slow-evaporating solvent.
  3. Warm parts more gradually, flash briefly before curing.


 
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Coating Curriculum Product knowledge Miscellaneous Information
 
 
 
 
 
Common Coating Problems

Bubbles, Pinholes

Bubbles - Common Coating problems

Appearance:

Many small pock-marks or tiny holes in the coating.

Probable Causes

  1. Excessive agitation, causing coating to foam, trapping gas or air bubbles.
  2. Excessive pumping or a leaking pump.
  3. Rapid evaporation of solvent.

Suggested Solutions

  1. Reduce agitation in tank and check pumping process
  2. Add small amount of slow-evaporating solvent.
  3. Warm parts more gradually, flash briefly before curing.



 
 
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