exterior areas that arefrequently exposed to cleaning or washing, including
steamcleaning.
The systems used for these surfaces make use of inorganic zinc as a
primer.Inorganic zinc is the best coating that can be applied to steel because
it provides the longest term of protection. In somes ituations, it may be
TABLE 8.7
Multilayer Paint Systems for New Clean Surfaces, Free of Chemical Contamination
System A. Epoxy Mastic
Paint layers
One coat epoxy mastic: 3–5 mils dft (75–125 m m)
Properties
Good color selection, excellent chemical resistance, good physical characteristics, ease of
maintenance.Used on carbon steel, concrete masonry units, masonry block (a filler is
recommended), sheet rock (a sealer is required), wood, polyvinyl chloride, galvanized steel,
and other surfaces.
Limitations
This is atwo-component material that is mixed just prior to application.A dditional
equipment is requiredand more expertise to apply than asingle packagedproduct. Epoxy
solvents may be objectionable to some people.
System B. Acrylic Primer/Acrylic Intermediate/Acrylic Finish
Paint layers
One coat acrylic primer: 2–3 mils dft (50–75 m m)
One coat acrylic intermediate: 2–3 mils dft (50–75 m m)
One coat acrylic finish: 2–3 mils dft (50–75 m m)
Properties
This is asingle package, water base, low odor,semigloss paint. It possesses excellent
weathering and acidic acid resistance. Can be used on most surfaces including carbon steel,
concrete, concrete masonry units, masonry block (a block filler is recommended), sheet rock
(a sealer is required), wood, polyvinyl chloride, galvanized steel, stainless steel, copper,and
fabric. May be applied over existing coatings of any type includingi norganic zinc.
Limitations
Must be protected from freezing during shipping and storage. For application, temperature
must be above 608 F/168 Cand will remain so for 2–3 hr after application.
System C. Acrylic Primer/Acrylic Finish
Paint layers
One coat acrylic primer: 2–3 mils dft (50–75 m m)
One coat acrylic finish: 2–3 mils dft (50–75 m m)
Properties
Excellent weathering and acidic chemical resistance, with good color selection.
Limitations
For best performance metallic surfaces should be abrasive blasted. For mild conditions hand
or power cleaning may be sufficient. Paint must be applied when temperatureexceeds
608 F/168 C.
Corrosion of Linings and Coatings
504
CAT8247—CHAPTER 8—17/10/2006—14:20—SRIDHAR—XML MODEL B–pp. 487–507
steamcleaning.
The systems used for these surfaces make use of inorganic zinc as a
primer.Inorganic zinc is the best coating that can be applied to steel because
it provides the longest term of protection. In somes ituations, it may be
TABLE 8.7
Multilayer Paint Systems for New Clean Surfaces, Free of Chemical Contamination
System A. Epoxy Mastic
Paint layers
One coat epoxy mastic: 3–5 mils dft (75–125 m m)
Properties
Good color selection, excellent chemical resistance, good physical characteristics, ease of
maintenance.Used on carbon steel, concrete masonry units, masonry block (a filler is
recommended), sheet rock (a sealer is required), wood, polyvinyl chloride, galvanized steel,
and other surfaces.
Limitations
This is atwo-component material that is mixed just prior to application.A dditional
equipment is requiredand more expertise to apply than asingle packagedproduct. Epoxy
solvents may be objectionable to some people.
System B. Acrylic Primer/Acrylic Intermediate/Acrylic Finish
Paint layers
One coat acrylic primer: 2–3 mils dft (50–75 m m)
One coat acrylic intermediate: 2–3 mils dft (50–75 m m)
One coat acrylic finish: 2–3 mils dft (50–75 m m)
Properties
This is asingle package, water base, low odor,semigloss paint. It possesses excellent
weathering and acidic acid resistance. Can be used on most surfaces including carbon steel,
concrete, concrete masonry units, masonry block (a block filler is recommended), sheet rock
(a sealer is required), wood, polyvinyl chloride, galvanized steel, stainless steel, copper,and
fabric. May be applied over existing coatings of any type includingi norganic zinc.
Limitations
Must be protected from freezing during shipping and storage. For application, temperature
must be above 608 F/168 Cand will remain so for 2–3 hr after application.
System C. Acrylic Primer/Acrylic Finish
Paint layers
One coat acrylic primer: 2–3 mils dft (50–75 m m)
One coat acrylic finish: 2–3 mils dft (50–75 m m)
Properties
Excellent weathering and acidic chemical resistance, with good color selection.
Limitations
For best performance metallic surfaces should be abrasive blasted. For mild conditions hand
or power cleaning may be sufficient. Paint must be applied when temperatureexceeds
608 F/168 C.
Corrosion of Linings and Coatings
504
CAT8247—CHAPTER 8—17/10/2006—14:20—SRIDHAR—XML MODEL B–pp. 487–507