UFC 4-150-07
19 June 2001
Underwater cure, two-component, 100% solid epoxy putty: 1 coat
at 3 to 6 mm (118.1 to 236.22 mils) DFT
3-4.3.2.2 Intertidal/Splash Zone
Two-component, coal tar epoxy: 1 to 2 coats at 0.2 to 0.4 mm
(7.387 to 15.75 mils) DFT
Single-component, coal tar urethane: 1 to 2 coats at 0.1 to 0.3 mm
(3.94 to 11.81 mils) DFT
Three-component, aggregate-filled epoxy: 1 coat at 3 to 6 mm
(118.1 to 236.22 mils) DFT
Additional systems are presented in UFGS-09967N, Coating of
Steel Waterfront Structures.
3-4.3.2.3 Above Splash Zone
Two-component epoxy polyamide primer followed by two coats of a
two-component, aliphatic urethane topcoat: 3 coats at 0.25 mm
(9.84 mils) DFT (0.15 mm (5.9 mils) primer, 0.1 mm (3.94 mils)
topcoat, 0.1 mm (3.94 mils) topcoat)
Single-component, zinc-rich urethane primer followed by two coats
of a single-component, aliphatic urethane topcoat: 3 coats at 0.2
mm (7.87 mils) DFT (0.1mm (3.94 mils) primer, 0.1 mm (3.94 mils)
topcoat, 0.1 mm (3.94 mils) topcoat)
Two-component epoxy polyamide primer followed by two coats of a
flexible acrylic topcoat: 3 coats at 0.5 mm 19.67 mils) DFT (0.15
mm (5.9 mils) primer, 0.2 mm (7.87 mils) topcoat, 0.2 mm (7.87
mils) topcoat)
3-4.3.3 Cathodic Protection of Steel. The natural corrosion of steel
structures immersed in water or buried in soil can effectively be controlled by
using anodes and direct current systems to minimize or stop the corrosion
process, by establishing the steel as a cathode. Cathodic protection systems are
best installed when the structure is constructed, but can be added to existing
structures. They can effectively stop corrosion but cannot restore the material
already lost by corrosion. Design and maintenance of cathodic protection
systems can be found in MIL-HDBK-1004/10, Cathodic Protection.
3-4.3.3.1 Galvanic Anode. Galvanic anode cathodic protection systems rely on
the corrosion of active metals such as zinc, magnesium or aluminum to generate
the electrical current needed to protect buried or submerged steel structures.
Since these anodes are sacrificed to protect the structure, they are known as
3-22
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