April's Adhesion Problem
Q. In the April issue there was a question about black paint having poor adhesion. You wrote about the oil absorption and bulking values of different pigments. I would have been interested in the gloss of his black paint. I have had problems when the gloss was a dead flat because it was difficult to determine the pigment solids. If pigment solids and the flatting agent were too high, the vehicle would not hold it together. Whenever I could, I would request the gloss to be at least three degrees, then we were able to help avoid this problem.
Better adhesion, enhanced corrosion and blister resistance, and reduced coating-part interactions make pretreatment a must.
Considerations when deciding whether or not a robot is the right choice for your facility...
Simply heating up the substrate does not cure the coating. There are many variables to consider when choosing the best cure oven for your application...