By this time you should have reliable results of possible attempts to solve your roof arcing problems. Could you please share your experience with me. I am working on the same problem now and your experience may be very valuable if you are willing to share it.
We are having success treating parts immersed in smelt at 2000 F with free sulphur present. Results are quite impressive. We would like to try our approach with HF and we are willing to treat a couple of test valves w/o charge. We use Chromium diffusion with a proprietory CVD process. This...