Pepperl+Fuchs VisuNet FLX System Manual page 111

VisuNet FLX System
Chemical Resistance
The chemical resistance of materials highly depends on various factors, including exposure
time, temperature, humidity etc. and can lead to different forms of product alterations including
discoloration, change in shore, tearing strength, volume etc.
The above listed materials have been assessed against following chemicals using an immer-
sion test (min. 48 h immersion @23 °C) and based on original manufacturer's material data-
sheet. Following test criteria have been defined for the assessment: visual parameters change
(e.g. color change, chalking, readability of texts) and degradation of mechanical properties.
Symbol
++
+
NR
NT
Acetic acid
(concentrated
50%)
Acetone
Ammonia (con-
centrated)
Ethanol
Formic acid
(concentrated
50%)
Glycol
Hydrofluoric
acid, 5%
Hydrogen per-
oxide (30%)
Isopentanol
Isopropanol
Methanol
Nitric acid (con-
centrated)
n-Hexane
Concentrated
mineral
Acids, Concen-
trated alkaline
Solutions, High-
pressure steam
above 100°C
Note
This list is not exhaustive! Other substances or parameters (e.g. exposure time, temperature,
humidity etc.) can have a negative impact on the resistance of the materials. Other chemicals
or parameters must be assessed individually and case by case.
Meaning
very good resistance (no alterations) under given test requirements
good resistance (small and/or temporary alterations, without impact on
mechanical properties) under given test requirements
Strong, permanent alternations under given test requirements
Material not tested / resistance not defined
Panel Gasket Glass Sealing
++ ++
++ +
+ ++
++ ++
+ ++
++ +
NR NT
++ ++
NR NT
++ ++
++ NT
NR NR
NR NR
NR NR
Screw covers /
Radio Dome Blind Plugs
++ +
++ NT
++ NT
++ NT
NR +
++ NT
NT NT
++ ++
NT NT
+ NT
++ NT
NT NT
NR NT
NR NT
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