Urethanefinds limited service in weak acid solutions and cannotbeused
in concentrated acids. Urethanes are not resistant to steamo rc austics,b ut
they are resistant to deteriorating effects of beingimmersedinwater.Refer to
Table 4.11f or the compatibility of urethane with selected corrodents and
Reference [1] for am ore comprehensive listing.
It is possible to apply uniform coatings or films of urethane to avariety of
substrate materials including glass, metal,wood,fabric,and paper.Urethane
coatings are oftenappliedt ot he interior of pipesa nd tanks.
Filtrationunits, clarifiers,holding tanks, and treatment sumps constructed
of reinforced concrete are widely used in the treatment of municipal,
industrial, and thermalg enerating station wastewater.I nm anyc ases,
particularlyi na naerobic,i ndustriala nd thermalg eneratings ystems,
urethane linings are used to protect the concrete from severe chemical
attackand prevent seepage into the concrete of chemicals that can attackthe
reinforcing steel.T hese linings provide protection against abrasiona nd
erosion, and act as aw aterproofing system to combat leakage of the
equipment resulting from concrete movement and shrinkage.
TABLE 4.9 Continued
Maximum Te mperature
Chemical
8 F
8 C
Perchloric acid
XX
Petroleum oils, sour
100
38
Phenol
XX
Phosphoric acid
XX
Potassium chloride, 30%
100
38
Potassium hydroxide, 50%
100
38
Propylene glycol
100
38
Sodium chloride
1104 3
Sodium hydroxide, to 50%
100
38
Sulfur dioxide, wet
100
38
Sulfuric acid
XX
Water,d emineralized
100
38
Water,d istilled
100
38
Water,s alt
130
54
Water,s ea
90
32
Water,s ewage
100
38
White liquor
100
38
Wines
100
38
Xylene
XX
The chemicalsl isted are in the pure state or in as aturated solution
unless otherwise indicated. Compatibility is shown to the maximum
allowable temperaturef or which data is available. Incompatibilityi s
shown by an X. Ab lank space indicates that the data is unavailable.
Source:FromP .A. Schweitzer.2004. Corrosion Resistance Ta bles,V ols. 1–4,
5th ed., New York: Marcel Dekker.
Liquid-Applied Linings
105
CAT8247—CHAPTER 4—17/10/2006—14:34—SRIDHAR—XML MODEL B–pp. 69–174
in concentrated acids. Urethanes are not resistant to steamo rc austics,b ut
they are resistant to deteriorating effects of beingimmersedinwater.Refer to
Table 4.11f or the compatibility of urethane with selected corrodents and
Reference [1] for am ore comprehensive listing.
It is possible to apply uniform coatings or films of urethane to avariety of
substrate materials including glass, metal,wood,fabric,and paper.Urethane
coatings are oftenappliedt ot he interior of pipesa nd tanks.
Filtrationunits, clarifiers,holding tanks, and treatment sumps constructed
of reinforced concrete are widely used in the treatment of municipal,
industrial, and thermalg enerating station wastewater.I nm anyc ases,
particularlyi na naerobic,i ndustriala nd thermalg eneratings ystems,
urethane linings are used to protect the concrete from severe chemical
attackand prevent seepage into the concrete of chemicals that can attackthe
reinforcing steel.T hese linings provide protection against abrasiona nd
erosion, and act as aw aterproofing system to combat leakage of the
equipment resulting from concrete movement and shrinkage.
TABLE 4.9 Continued
Maximum Te mperature
Chemical
8 F
8 C
Perchloric acid
XX
Petroleum oils, sour
100
38
Phenol
XX
Phosphoric acid
XX
Potassium chloride, 30%
100
38
Potassium hydroxide, 50%
100
38
Propylene glycol
100
38
Sodium chloride
1104 3
Sodium hydroxide, to 50%
100
38
Sulfur dioxide, wet
100
38
Sulfuric acid
XX
Water,d emineralized
100
38
Water,d istilled
100
38
Water,s alt
130
54
Water,s ea
90
32
Water,s ewage
100
38
White liquor
100
38
Wines
100
38
Xylene
XX
The chemicalsl isted are in the pure state or in as aturated solution
unless otherwise indicated. Compatibility is shown to the maximum
allowable temperaturef or which data is available. Incompatibilityi s
shown by an X. Ab lank space indicates that the data is unavailable.
Source:FromP .A. Schweitzer.2004. Corrosion Resistance Ta bles,V ols. 1–4,
5th ed., New York: Marcel Dekker.
Liquid-Applied Linings
105
CAT8247—CHAPTER 4—17/10/2006—14:34—SRIDHAR—XML MODEL B–pp. 69–174