UFC 4-151-10
10 September 2001
Table 5-1 Period of Protection for Steel to be Expected from Various Coating
Systems of Common Use[a]
COAT DESCRIPTION[b]
PERIOD OF PROTECTION[c]
Coal tar epoxy (15 to 20 mils
10 - 20 years
thickness)
Galvanizing (7 to 9 mils thickness)
10 - 15 years
Metallized Aluminum
15 - 20 years
Concrete Encasement
25 years
Notes:
(a) Marine exposure
(b) Coatings applied properly
(c) Periods of good to excellent protection, i.e. negligible loss of metal
5-2.3
Use of Weathering Steels. Use "weathering" steels conforming to the
following requirements:
The following steels require coating in the splash zone and other areas not
boldly exposed to sun, wind, and rain: Alloy steels conforming to ASTM
There are no consistent data on the rate of corrosion loss for steel surfaces
in contact with various soils, so that consideration should be given to coating these
surfaces in the same manner and degree as for ASTM A36, Structural Steel.
If an alloy conforming to ASTM A690 is used, use hardware conforming to
5-3
CATHODIC PROTECTION. Consider cathodic protection for all buried or
submerged steel structures or utilities in accordance with MIL-HDBK-1004/10, Cathodic
5-3.1
Cathodic Protection Systems. Consider a Cathodic Protection System
(CPS) in conjunction with other protective measures such as material thickness
5-2
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