|
 Salt Spray Cycle
-
Hot, humid air is created by
bubbling compressed air
through a bubble
(humidifying) tower
containing hot deionized
water.
-
Salt solution is moved from
the 60-gallon reservoir
through a filter to the
nozzle by a gravity-fed
system.
-
When the hot, humid air and
the salt solution mix at the
nozzle, it is atomized into
a corrosive fog. The fog is
distributed by the Unifog
dispersion system.
-
Strip heaters maintain the
programmed set-point
temperature.
High Humidity Cycle
During the
humidity cycle, the chamber
operates much like the salt fog
cycle, except that deionized
water is fed to the atomizer
nozzle rather than a salt
solution. This creates a 100%
relative humidity condition in
the exposure zone.
Dry Cycle
For a low
humidity state in the exposure
zone of the chamber, air is
forced into the exposure zone
via a blower motor which directs
air over the energized chamber
heaters. Chamber temperature is
set by the user and controlled
by the chamber controller.
Dwell Cycle:
During the Dwell Cycle, no action is taken by any of the chamber components.
Cyclic Corrosion Test Chambers Optional Cycles
Controlled Humidity Cycle: (Optional)
-
A solid-state humidity
sensor reads the current
humidity condition and
compares that to the
humidity set-point in the
controller.
-
A mechanism used to control
the humidity moves chamber
air via a blower motor and
passes it over a heater coil
in the bottom of the
chamber with an atomizer
nozzle fogging into the air
stream.
-
As humidity is needed, the
controller pulses the
atomizer nozzle on and off
while recirculating the air
flow.
Solution Spray Cycle: (Optional)
Solution is
taken from the holding tank via
a solution pump and driven
through a spray bar header
inside the exposure zone onto
the parts with a multiple spray
nozzle.
Immersion Cycle: (Optional)
A series of
valves, float switches, and a
pump move solution from a
heated holding tank into the
exposure zone via the chamber
drain. Once this cycle is over,
the process reverses and moves
the solution out of the exposure
zone and back into the holding
tank.
|
