TABLE 6.27
Vapor Permeation of FEP
Permeation( g100 in.
2 /24 h/mil) at:
738 F(238 C)
958 F(358 C)
1228 F(508 C)
Gases
Nitrogen
0.18
Oxygen
0.39
Vapors
Acetic acid
0.42
Acetone
0.13
0.95
3.29
Acetophenone
0.47
Benzene
0.15
0.64
n -Butyl ether
0.08
Carbon tetrachloride
0.110 .31
Decane
0.72
1.03
Ethyl acetate
0.06
0.77
2.9
Ethyl alcohol
0.110 .69
Hexane
0.57
Hydrochloric acid, 20%
0.01
Methanol
5.61
Sodium hydroxide, 50%
4 ! 10
K 5
Sulfuric acid, 98%
8 ! 10
K 6
Toluene
0.37
2.93
Water
0.09
0.45
0.89
TABLE 6.28
Absorption of Selected Liquid
a by FEP
Chemical
Te mperature
( 8 F/8 C)
Range of Weight
Gains (%)
Aniline
365/185
0.3–0.4
Acetophenone
394/201
0.6–0.8
Benzaldehyde
354/179
0.4–0.5
Benzyl alcohol
400/204
0.3–0.4
n -Butylamine
172/78
0.3–0.4
Carbon tetrachloride1 72/78
2.3–2.4
Dimethylsulfoxide
372/190
0.1–0.2
Nitrobenzene
410/210
0.7–0.9
Perchlorethylene
250/121
2.0–2.3
Sulfuryl chloride
154/68
1.7–2.7
Toluene
230/110
0.7–0.8
Tributyl phosphate
b
392/200
1.8–2.0
a 16 hexposurea ttheir boiling points.
b Not boiling.
Corrosion of Linings and Coatings
380
CAT8247—CHAPTER 6—6/10/2006—12:31—SRIDHAR—XML MODEL B–pp. 287–402