Good afternoon all, Recognizing that asking a question of this group late on a Friday afternoon is questionable judgement on my part, I will give it a shot anyway. I am in the midst of the most perplexing material investigation of my life. Provided I do not get shot, hung or tarred/feathered, I will have some neat stuff to publish in the next few years. I have a general question on testing coatings, other than what you might do in aerospace. Most temperature-humidity tests done on conformal coating are of the cyclical variety, 25C to 65C, 90% RH for a week. This one is found in MIL-I-46058 and IPC-CC-830 and is used for material qualification. Nothing unusual there. There are cyclical temperature-humidity test that are done as part of product qualification, such as DO-160E or MIL-STD-883. But these are also of the cyclical variety and 25C to 65C is common there as well. Nothing unusual there. How would one simulate a coated assembly, stored in a cold and clammy environment (40-50F, 85-100% RH with probable dew points each day) for months at a time, then powered up? Are there any tests done in your industry that tests a coatings resistance to a prolonged cold and clammy conditions? Ideally with some form of acceleration factor? I know that the automotive industry has something called a "damp heat" kind of test, but have no experience with that. I know I can program my humidity chamber for an environment, but don't really have time to let it sit 3-6 months. It has been suggested that I jump in my time machine and go back 6 months and I would be done by now, but my flux capacitor went through our Kyzen cleaning process and has no flux left. I blame Hillman. So, any thoughts would be appreciated. Doug Pauls ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________