On Fri, 28 Aug 2009 22:08:51 -0500, "Martin H. Eastburn"
wrote:

I find the pure water - attacks ? I don't think so.

Chlorine and such will. H2O is stable. If they have
electric current flowing in the pipes - possible - it can
break down H2O into hydrogen gas and oxygen gas.
The hydrogen will attack steel. The oxygen will attack
almost anything.

I bet they had a mixed iron and copper system and did themselves
in without using current breaks - plastic joints.

Martin

We had to guard against using de-ionized water in recirculating
cooling systems for extruders (primarily D2 steel). The operations
manual from the manufacturer warned against it due to excessive
corrosion. Specs were given for water quality.

Of course, this was in boiling service. Cooling was accomplished by
small shots of water into the cooling channels in the extruder
barrels, which since they were at 2-300 deg C caused the water to
immediately flash to steam.

Pete Keillor

Wes wrote:
"Tim" wrote:

IIRC,
our machines had to use deionized water.

I heard a horror story where a facility put in a reverse osmosis system to take all
impurites out of the feed water. Then they started having even more problems. Really
pure water attacks the alloying elements in the plumbing.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller