CORROSION TEST APPLIANCE
Used in test rooms in order to
test and verify samples against
various corrosive conditions.
Corrosive conditions are created
inside the test room by
simulation,
using heat and humidity. The
corrosion effect can further be
intensified with the use of
aggressive test solutions.
The most important tests are the
"Salt Spray Tests" and
"Condensed Moisture Tests". The
methods can either be used
separately or in combination.
There are a variety of national
and international codes and
standards applicable.
|
Condensed Moisture Test
TS EN ISO 6270-2 (DIN
50017) |
|
A condensation water
medium is created on
test samples under a
temperature of 40°C.
De-mineralized water is
fed inside the room and
heated up for
vaporisation. Relative
Humidity is
approximately 100%. It
can be combined with
high humidity periods,
ventilation or free
cooling periods. |
|
 salt
Spray Test TS ISO 9227
(DIN 50021)
According to this
standard, salty water is
sprayed inside the room
at 35°C or 50°C. Acetic
acid or Copper Chloride
can be added to the NaCl
solutions, in order to
speed up the corrosive
reactions. A thin salt
mist condenses above the
test samples and
initiates corrosion.
According to DIN 50021
the minimum internal
space of a salt spray
test room should not be
less than 400 litres |
|
.Alternative
Tests i.e.
VDA 621-415
|
|
Different manufacturers,
organisations and
institutions have
developed different loop
standards and
combinations of
different periods like
condensation medium,
salt spray, drying or
ventilation. The purpose
is to create the
conditions that are most
close to the
environmental stresses
in the real world. |
