Water Washing Of Metal With/Without Detergents
- Procedure code:
- Outdoor Sculpture Manual - Center For Public Buildings
- Ornamental Metal Castings
- Last Modified:
WATER WASHING OF METAL WITH/WITHOUT DETERGENTS
A. This procedure includes guidance on cleaning metal by
mild water washing with or without detergents and soft
natural bristle brushes.
A. GAF Corporation
1361 Alps Road
Wayne, NJ 07470
A. Non-ionic detergent, such as "Zyfo" cleaner concentrate
-a controlled suds, silicate buffered, non-ionic,
rinseless-type synthetic detergent, containing no soap,
free alkali, solvents, abrasives, acids, caustics or the
like, "Igepal 630" (GAF Corporation) or approved equal.
B. Supplementary Materials for Bronze:
1. Bronze wool, extra fine, such as that manufactured
2. Corrosion Inhibitor, Benzotriazole (BTA) such as
"Cobratec" (GAF Corporation), or approved equal
C. Supplementary Materials for Cast Iron:
1. 600 grit aluminum oxide paper, emery paper or fine
2. Complexing agent such as "Versene", or approved
D. Clean, potable water
E. Toweling or rags, clean, lint-free
A. Buckets, molded rubber or plastic, such as the "Fortex"
molded rubber pail - 12 or 14 quart size, or Rubbermaid
B. Washing brushes: Available from local janitorial supply
houses or hardware stores
1. Tampico fiber set in a hardwood block
2. "Whitewash brush" - ideal for most purposes
3. "Parts washing" brush - useful for small areas and
C. Rubber gloves and rain gear, if desired
D. Garden hose
3.01 ERECTION, INSTALLATION, APPLICATION
A. Fill one or two buckets with about two gallons of water.
NOTE: Water washing alone will remove most common dirt
and grime; however, at times supplemental materials will
be needed to remove the deposits.
1. For Bronze: Add BTA to wash water to make a 1 to
3% solution of BTA to water.
2. For Detergent Washing: Add 1 to 3 ounces of
detergent per gallon of water.
B. Beginning at the top and gradually working down, scrub
the metal surface lightly with the fiber brush to remove
any superficial deposits. Take care to avoid scratching
or otherwise damaging the protective coating.
C. Thoroughly rinse the surface with clean, clear water.
1. For Cast Iron: Rinse with 2% aqueous solution of
D. Dry with clean, lint-free toweling or rags.
E. For tenacious mineral deposits or exudations of core
material, treat locally with gentle abrasion using very
fine bronze wool. Exercise great care to avoid damaging
the coating and patina.
END OF SECTION