Microsoft filled a mobile datacenter with nitrogen, and lowered it down 117 feet to the ocean’s floor off Scotland in 2018. They pulled it up earlier this summer too see how things were looking.
“Our failure rate in the water is one-eighth of what we see on land
Seems like things went pretty good!
The team hypothesizes that the atmosphere of nitrogen, which is less corrosive than oxygen, and the absence of people to bump and jostle components, are the primary reasons for the difference.