Pickling

[A64Pilot]

They are drying and or purging the cables as I understand it, not the boxes. I believe there is pretty much zero gas flow so once purged/ dried the the cables stay that way for a long time.

Nitrogen is used a lot to displace O2 for different reasons, it’s used in Beer brewing to prevent oxidation of the beer I guess. We even had an NIU (nitrogen inserting unit) on the Apache that pumped nitrogen into the fuel cells so the gas above the fuel wasn’t explosive, the NIU was really just an O2 concentrator, just the O2 was expelled overboard and what was left was mostly N2 and that was dumped into the aft fuel cell, the fwd fuel cell vent opened at a slightly lower pressure than the aft so the N2 flowed through both cells and overboard thru the front.

It had the side benefit if extending the life of the fuel cells it seemed.

[MikeOH]

2 hours ago, A64Pilot said:

They are drying and or purging the cables as I understand it, not the boxes. I believe there is pretty much zero gas flow so once purged/ dried the the cables stay that way for a long time.

Do you have a cite to support your belief?

It doesn't pass the sniff test: If no gas flow is required after 'the purge' then why do I see the tanks remain in place PERMANENTLY.  And, why do the cables need to be 'dried out' in the first place?  It seems far more likely that all the connections within the BOXES are prone to corrosion, NOT wires with all manner of insulation inherent in their construction.

Without out some form of verifiable proof one way or the other we are just another pair of SGOTIs disagreeing

[Pinecone]

It would be hard to seal the box to maintain a dry atmosphere.  

Not sure about why the cables need it either.  It is used in some communications cables to prevent moisture from condensing inside.

From Reddit -