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I worked with ultra high vacuum equipment and am pretty familiar with this. The term I've heard is "galling." UHV is not compatible with the use of greases ei

I worked with ultra high vacuum equipment and am pretty familiar with this. The term I've heard is "galling." UHV is not compatible with the use of greases either. We would use silver plated screws to avoid stuck fasteners, and to avoid galling for small and delicate fasteners inside of the chamber where silver couldn't be used as it might be a contamination source, Trichloroethylene would work as a lubricant that evaporated without residue.

Workaccount2 3y ago
The NASA fastener handbook specifically calls for using silver plated nuts on steel bolts for aerospace. Very cool. >Silver plating is cost prohibitive for most fastener applications. The big exception is in the aerospace industry, where silver-plated nuts are used on stairdess steel bolts. The silver serves both as a corrosion deterrent and a dry lubricant. Silver plating can be used to 1600 “F, and thus it is a good high- temperature lubricant. https://ntrs.nasa.gov/api/citations/19900009424/downloads/19900009424.pdf https://ntrs.nasa.gov/api/citations/19900009424/downloads/19...