Hi

"brian clode" skrev i en meddelelse
...

I have been told that you should not do it but Can anyone explain why you
should not put diesel fuel in a galvanised fuel tank. What happens?
Brian



Galvanised is zink coated soft steel, when using from the tank air will replace
the fuel used , then at night the tank get cold and fumes of water wil
condensate inside the tank , then next day new air replace the now dry air or
moisture will enter the air again and the show can go on. Now when the water
enter the fuel , some quite bitter substances are washed out of the
fuel, --------- somthing that go directly for the weak zink galvanizing , so in
the end your tank start rust at the bottom !
Use stainless steel for Diesel tanks or make sure the condensating water will
end up in a "cup" specialy designed for that at the bottom of the tank.
Also this is the reson there alway's be somthing left in an emty tank, tanks are
simply made so, that the fuel pipe never reach down the very bottom, as
othervise starting the engine for a long time rest, you could be getting water
not Diesel from the tank into the fuel pump , Diesel engines is robust but they
don't run on water
P.C.

Any water that gets into the tank (emulsion, condensation, etc.) will
settle to the bottom. A bacterial broth will form at the interface
bewtween oil and water, such bacteria will use the zinc as part of their
nutrient source and eventually penetrate the zinc layer. Penetrated
zinc etc. coatings will corrode FASTER than bare steel/iron in the
presence of free water.

Its OK to use a steel or galvanized tank; but, you need to add a pumped
recirculation drop-out "pot" (free water) and water absorbing filter set
(emulsions) to be sure the water is removed (from the tank bottom) ...
and run the recirculation filter set on an almost constant basis. Such a
filter 'train' will be much cheaper than the large $difference between a
stainless and an iron tank ... on a BIG tank.

brian clode wrote:
I have been told that you should not do it but Can anyone explain why you
should not put diesel fuel in a galvanised fuel tank. What happens?
Brian

"Bill Gough" wrote in message ...
: On Thu, 21 Aug 2003 14:41:11 +0100, "brian clode"
: wrote:
:
:
: I have been told that you should not do it but Can anyone explain why you
: should not put diesel fuel in a galvanised fuel tank. What happens?
: Brian
:
: The diesel dissolves the galvanized coating and the resulting sludge
: gums everything up.

Just did a google search on zinc diesel fuel tanks - and waded through
a bunch of stuff - yer right - http://www.bp.com.au/fuelnews/ADF1402.pdf
talks about long term diesel storage, and sez zinc destabilizes diesel, and so,
apparently, does copper. So much for copper fuel lines and brass connections.

Dave