"Franklin Newton" wrote in message .net...

"Blueskies" wrote in message
...

We started getting quite a few of our pups back from European operators
with the cad plated parts very corroded. Turns
out the Europeans were using some sort of new deicer stuff on their
runways and all. Unfortunately I do not know what
it was exactly, but you can do some testing on your own parts. Get some
old screw hardware from your local mechanic
and see what happens...


That pups should be pumps, as in hydraulic.
http://www.parker.com/ag/pdf/abexbrochure.pdf in case you are
interested...


Cadmium plating is routinely stripped from the base metal using an amonium
nitrate solution, hence the corrosion.



That may be the case, and maybe ammonium nitrate was the 'new' material that was being used over there, but it the
problem was sudden and they are no longer using whatever-it-was because the problem has gone away. Almost all of the
steel components on the pumps are cad plated, as well as many of the landing gear parts. There was quite an uproar there
for a while...