132
Fundamentals of Corrosion
Table 4.10 lists the operating temperature ranges of thermoset polymers and
Table 4.11 provides the atmospheric resistance of the thermoset polymers.
TabLE 4.10
Operating Temperature Ranges of Thermoset Polymers
Polymer
Allowable Temp. (°F/°C)
Minimum
Maximum
Epoxy
−423/−252
300/150
Polyesters:
Bisphenol A – fumurate
250–300/120–150
Halogenated
250–300/120–150
Hydrogenated bisphenol A – bisphenol A
250–300/120–150
Isophthalic
150/70
Terephthalic
250–300/120–150
Vinyl ester
200–280/98–140
Furan
300–400/150–200
Phenolic
230/110
Silicone
−423/−252
500/260
Note: Temperatures might have to be modified, depending on the corrodent.
Source: From Reference 11.
TabLE 4.11
Atmospheric Resistance of Fiberglass-Reinforced Thermoset Polymers
Polymer
UV
Degradation
Moisture
Absorption a Weathering
Ozone
SO 2 NO x H 2 S
Epoxy
R
0.03
R
R
R
R
R
Polyesters:
Bisphenol A
– fumarate
RS
0.20
R
R
R
R
R
Halogenated
RS
0.20
R
R
R
R
R
Hydrogenated
bisphenol A
– bisphenol A
RS
0.20
R
R
R b
R
Isophthalic
RS
0.20
R
R
R
R
R
Teraphthalic
RS
0.20
R
R
R
R
R
Vinyl ester
R
0.20
R
R
R
R
R
Furan
R
2.65
R
R
R
R
R
Phenolic
R
R
Silicone
R
0.02–0.06
R
R
R
R
Note: R = resistant; RS = resistant only if stabilized with UV protector; and X = not resistant.
a Water absorption rate 24 h at 73ºF/23ºC (%).
b SO 3 will cause severe attack.
Source: Reference 12.