When they recover these things, why do they put them into a container of water? Is this to stop corrosion and if so, corrosion of what ?

the electronics i guess. i believe the modern ones use solid state memory instead of the mag tape.

>When they recover these things, why do they put them into a container of water? Is this to stop corrosion and if so, corrosion of what ?

…. cracks or leaks …… bubbles coming out …?

they only put them in water if they have been recovered from water.

What happens if a plane lands in a pool full of jelly?

sibeen said:

What happens if a plane lands in a pool full of jelly?

It’s party time

sibeen said:

What happens if a plane lands in a pool full of jelly?

They sing the Aeroplane jelly song.

Tamb said:

sibeen said:

What happens if a plane lands in a pool full of jelly?

They sing the Aeroplane jelly song.

ROFL

Tamb said:

sibeen said:

What happens if a plane lands in a pool full of jelly?

They sing the Aeroplane jelly song.

Nice work!

:) :) :)

Michael V said:

Tamb said:

sibeen said:

What happens if a plane lands in a pool full of jelly?

They sing the Aeroplane jelly song.

Nice work!

:) :) :)

And for those of you who don’t know it: https://www.youtube.com/watch?v=dJZ2w6Q_Uww

15

down vote

accepted

This is actually a fairly standard thing to do with electronics that have been submerged: They are placed in water (ideally fresh, clean water) to both delay the onset of corrosion and dilute any salts or other chemicals that they came in contact with while submerged.

When you remove electronics from water and let them dry out they begin to form corrosion on all the little exposed bits of metal – chip legs, solder joints, capacitors, etc. – which can badly damage the device when it is powered back on. Keeping the device submerged in water delays the onset of this corrosion because the dissolved oxygen in the water is lower than the oxygen in the air that would be hitting those parts as they dry out.

The Cockpit Voice Recorder and Flight Data Recorder are water resistant, but they are not necessarily waterproof (particularly after a crash, which may puncture their casings or damage seals), so they get placed in a container of fresh water for their trip to the NTSB’s lab. When the still-immersed equipment arrives at the NTSB laboratory it can be examined and dried in a controlled environment, maximizing the chance to recover data.

http://aviation.stackexchange.com/questions/6420/why-is-the-fdr-and-cvr-put-into-water-again-after-a-water-crash

http://www.abc.net.au/news/2014-03-26/black-box-flight-recorders/5343456

Thanks SP

Skeptic Pete said:

This is actually a fairly standard thing to do with electronics that have been submerged: They are placed in water (ideally fresh, clean water) to both delay the onset of corrosion and dilute any salts or other chemicals that they came in contact with while submerged.

When you remove electronics from water and let them dry out they begin to form corrosion

Yes. Corrosion is caused by the combination of electrolyte, water and oxygen. The worst possible thing for corrosion is evaporation of salt water. Evaporation has the dual effect of concentrating the salt electrolyte on the surface and allowing oxygen into contact with that surface. Placing in fresh water acts to remove any electrolytes from the surface and well as to partly excluding oxygen.

I only use the finest spring water for my flight recorders