Chapter 5 – Maintenance
5-3
Chemical Compatibility
Certain combinations of chemical environments, temperature, and stress can adversely af-
fect parts made from thermoplastic resin. For this reason material which may come in
contact with the 9460/9462 unit should be carefully evaluated under end-use conditions for
compatibility. You should also follow the use and compatibility recommendations of the
material manufacturer. The following table lists general chemical compatibility guidelines
for the 9460/9462.
Chemical Class Effects
Acids No effect under most common conditions of concentration and tem-
perature.
Alcohols Generally compatible at low concentration and room temperature.
Higher concentrations and elevated temperatures result in etching
and attack evidenced by decomposition.
Alkalis Generally compatible at low concentration and room temperature.
Higher concentrations and elevated temperatures result in etching
and attack evidenced by decomposition.
Aliphatic Hydro-
carbons
Generally compatible
Amines Surface crystallization and chemical attack. Avoid.
Aromatic Hydro-
carbons
Partial solvents and severe stress cracking agents. Avoid.
Detergents and
Cleaners
Mild soap solutions are compatible. Strong alkaline materials should
be avoided.
Esters Causes severe crystallization. Partial solvents. Avoid.
Greases and
Oils
Pure petroleum types generally compatible. Many additives used with
them are not compatible.
Halogenated
Hydrocarbons
Solvents. Avoid.
Ketones Causes severe crystallization and stress cracking. Partial solvents.
Avoid.
Silicone Oil and
Greases
Generally compatible up to 85ºC (185º F). Some contain aromatic
hydrocarbons which should be avoided.
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