Oxidation Products: Clean with solvent, steam, or non-alkaline
detergent solution in accordance with SSPC SP 1. If the
galvanized metal has been passivated or stabilized, the coating
shall be completely removed by brush-off abrasive blast. New
galvanized steel to be coated shall not be "passivated" or
"stabilized" If the absence of hexavalent stain inhibitors is not
documented, test as described in ASTM D 2092, Appendix X2, and
remove by one of the methods described therein.
**************************************************************************
NOTE: Delete the text below if there are no
existing surfaces to receive coatings. For
paragraph entitled "Galvanized with Slight Coating
Deterioration or with Little or No Rusting," verify
there are no local or base restrictions on the use
**************************************************************************
b.
Galvanized with Slight Coating Deterioration or with Little or No
Rusting: Water jetting to SSPC SP 12 WJ3 to remove loose coating
from surfaces with less than 20 percent coating deterioration and
no blistering, peeling, or cracking. Use inhibitor as recommended
by the coating manufacturer to prevent rusting.
**************************************************************************
NOTE: Delete the text below if there are no
existing surfaces to receive coatings. For
paragraph entitled "Galvanized with Severe
Deteriorated Coating or Severe Rusting," verify
there are no local or base restrictions on the use
**************************************************************************
c.
Galvanized With Severe Deteriorated Coating or Severe Rusting:
[Water jet to SSPC SP 12 WJ3 degree of cleanliness.] [Spot
abrasive blast rusted areas as described for steel in SSPC SP 6,
and waterjet to SSPC SP 12, WJ3 to remove existing coating.]
3.5.4
Non-Ferrous Metallic Surfaces
Aluminum and aluminum-alloy, lead, copper, and other nonferrous metal
surfaces.
a.
Surface Cleaning: Solvent clean in accordance with SSPC SP 1 and
wash with mild non-alkaline detergent to remove dirt and water
soluble contaminants.
3.5.5
Terne-Coated Metal Surfaces
Solvent clean surfaces with mineral spirits, ASTM D 235.
Wipe dry with
clean, dry cloths.
3.5.6
Existing Surfaces with a Bituminous or Mastic-Type Coating
Remove chalk, mildew, and other loose material by washing with a solution
of 0.20 liter 1/2 cup trisodium phosphate, 0.1 liter 1/4 cup household
detergent, 1.6 liters one quart 5 percent sodium hypochlorite solution and
4.8 liters 3 quarts of warm water.
SECTION 09900
Page 32
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