Autoclave corrosion coating for BLDC stator/PCB
Autoclave corrosion coating for BLDC stator/PCB
(OP)
Need some help with a coating to protect the iron of a BLDC stator and PCB boards. I've been getting issues with small BLDC motors with rust and electrical issues (open/shorts) on the stator and PCB hall sensors that are caused by autoclaving the motor. The motor is placed in 10 minute autoclave steam cycles (134°C). Things I have tried are nail polish, silicone based conformal coating, and high temp petroleum jelly. They all work a bit just want something better. Potting 2 part epoxy re-sin will work but I like something that I can brush on the stator and PCB components in room temperature.
Any help would be greatly appreciated.
Any help would be greatly appreciated.





RE: Autoclave corrosion coating for BLDC stator/PCB
RE: Autoclave corrosion coating for BLDC stator/PCB
RE: Autoclave corrosion coating for BLDC stator/PCB
Parylene and preheat combined are your only hope, and add a dry out cycle on the end.
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P.E. Metallurgy, Plymouth Tube
RE: Autoclave corrosion coating for BLDC stator/PCB
Thanks
RE: Autoclave corrosion coating for BLDC stator/PCB
You need something that is thin, warm you parts, soak and pull a vacuum, then drain and cure.
Silcones are good for temp but not so good with water.
Pay for Parylene, it works.
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P.E. Metallurgy, Plymouth Tube