I have a sensor housing that is used for winter plow trucks. I have my fabricator of the housing powder coat it. It seems to have good integrity, but some tests I have been doing with thermo-shock from about 0 degrees F to 170 degrees F have shown some flaking problems. The material is flaking in sheets, like the metal may not have been prepared properly.
Can someone give me a quick prep course so that I can talk intelligently to the powder coat supplyer? What prep questions should I ask? Are there different types of powder coat that may be better for the harsh environments seen by a winter plow truck?
rec.crafts.metalworking