necessary to substitute an organic zinc(an organic bindersuchasepoxy or
polyurethane with zinc added) for the inorganic zinc.
Recommended systemsa re B, C, and Eo fT able 8.4 and Ao fT able 8.6.
8.6.5 Area 5. Saltwater Exposure
This area includes interioro re xteriorl ocations on or near as eacoast or
industrial environments handling brine or other salts. Under these conditions, the surfaces aref requently wet by salt water and includec ondensation, splash,o rspray.
Conditions in this area are essentially the same as for freshwater and the
comments for area 4a pply here.B ecause of the more severe conditions,
it is recommended that two coats of the primerb ea pplied for system Eo f
Table 14.1 of Fundamentals of MetallicCorrosion: Atmospheric and Media Corrosion of Metals and system Ao fT able 8.6.
Recommended systemsa re B, C, and Eo fT able 8.6 and Ao fT able 8.6.
TABLE 8.8
Multilayer Paint Systems Requiring an Abrasive Blast to the Substrate Surface
System A. Epoxy Primer/Polyurethane Finish
Paint layers
One coat epoxy primer: 3–5 mils dft (75–125 m m)
One coat polyurethane finish: 2–3 mils dft (50–75 m m)
Properties
Twocoat protection is provided with excellent high gloss finish and long-termc olor gloss
retention. Normally applied to carbon steel and concrete.
Limitations
Since these are two component materials they must be mixed just prior to application and
require additional equipment and moree xpertise to apply.
TABLE 8.9
Multilayer Paint Systems for Previously Painted Surfaces That Have Had Loose Paint
and Rust Removed by Hand Cleaning
System A. Oleoresin
Paint layers
One coat oleoresin: 2–4 mils dft (50–100 m m)
Properties
This very slow drying material penetrates and protects existing surfaces that cannot be
cleaned properly with asingle coat. Provides long-term protection without peeling, cracking,
and other such problems. Easy to apply by spray,brush, roller, or glove. Normally used on
carbon steel and weathering galvanized steel.
Limitations
This material is designed to protect steel that will not see physical abuse. It also stays soft for
an extended period of time.
Specific Organic Coatings
505
CAT8247—CHAPTER 8—17/10/2006—14:20—SRIDHAR—XML MODEL B–pp. 487–507
polyurethane with zinc added) for the inorganic zinc.
Recommended systemsa re B, C, and Eo fT able 8.4 and Ao fT able 8.6.
8.6.5 Area 5. Saltwater Exposure
This area includes interioro re xteriorl ocations on or near as eacoast or
industrial environments handling brine or other salts. Under these conditions, the surfaces aref requently wet by salt water and includec ondensation, splash,o rspray.
Conditions in this area are essentially the same as for freshwater and the
comments for area 4a pply here.B ecause of the more severe conditions,
it is recommended that two coats of the primerb ea pplied for system Eo f
Table 14.1 of Fundamentals of MetallicCorrosion: Atmospheric and Media Corrosion of Metals and system Ao fT able 8.6.
Recommended systemsa re B, C, and Eo fT able 8.6 and Ao fT able 8.6.
TABLE 8.8
Multilayer Paint Systems Requiring an Abrasive Blast to the Substrate Surface
System A. Epoxy Primer/Polyurethane Finish
Paint layers
One coat epoxy primer: 3–5 mils dft (75–125 m m)
One coat polyurethane finish: 2–3 mils dft (50–75 m m)
Properties
Twocoat protection is provided with excellent high gloss finish and long-termc olor gloss
retention. Normally applied to carbon steel and concrete.
Limitations
Since these are two component materials they must be mixed just prior to application and
require additional equipment and moree xpertise to apply.
TABLE 8.9
Multilayer Paint Systems for Previously Painted Surfaces That Have Had Loose Paint
and Rust Removed by Hand Cleaning
System A. Oleoresin
Paint layers
One coat oleoresin: 2–4 mils dft (50–100 m m)
Properties
This very slow drying material penetrates and protects existing surfaces that cannot be
cleaned properly with asingle coat. Provides long-term protection without peeling, cracking,
and other such problems. Easy to apply by spray,brush, roller, or glove. Normally used on
carbon steel and weathering galvanized steel.
Limitations
This material is designed to protect steel that will not see physical abuse. It also stays soft for
an extended period of time.
Specific Organic Coatings
505
CAT8247—CHAPTER 8—17/10/2006—14:20—SRIDHAR—XML MODEL B–pp. 487–507