What is the best pretreatment for the aluminum surface for maximum corrosion resistance and adhesion, recognizing that specific primers are recommended by adhesive suppliers for their systems?
Recently, we have been having problems with the curing of some of our paints. Some seem to cure, while some of them do not. I tend to think that the issue is color specific, but also related to humidity levels in the painting environment. Have you heard of this before?
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.
One of our customers has 48 steel valves ranging from from 6–48 inches. These valves were supplied to our customer coated with a high temperature one-pack silicone coating system. We have been instructed to repaint these valves.
The same paint does not produce the same wrinkle texture when applied by the vendors—and we have tried different vendors. The only difference I can see is that we use electrically-fired ovens and they use gas-fired ovens. What do you think about this?
Is there something inherent in black pigment, or in other materials or processes used to make black paint, that prevents it from adhering as well as other colors do?
I am interested in coating PVC foam boards with paint. I heard that vacuum coating is a process that will work for this application. Can you direct me to a company that can either supply the equipment to vacuum coat, or provide the service to vacuum coat? Are you aware of any other methods that could be used to coat these boards?
We want to coat our wire (0.80 mm diameter) with a high viscosity UV ink as a thin layer (~20 µm). You have suggested in your article to use a 'wire tower.' Are there sample drawings or pictures of this system? Currently our line is running on a horizontal sequence. Is there an applicator by which we can paint the wire in a horizontal position?
I have built a log splitter from carbon steel. What is the easiest way for me to prepare the steel for painting with zinc oxide primer and implement paint?
