atmospherically exposed surfaces. Systems using
different metallizing materials should not be used
for such applications. The use of multiple
protective coating systems tailored to a specific
structure may result in significant cost savings.
Systems No. 1-Z and 4-Z-A are considered equivalent
and may be interchanged by the project specification
writer. Systems No. 1-Z and 4-Z-A are intended for
use on steel surfaces in normal atmospheric
exposures.
Systems No. 2-Z and 5-Z-A are considered equivalent
for atmospheric exposures only and may be
interchanged by the project specification writer for
this use. Systems No. 2-Z and 5-Z-A are intended
for use on steel surfaces in normal and severe
industrial atmospheres and for steel surfaces
subject to prolonged periods of condensation.
System 5-Z-A may also be used on steel surfaces in
continuous or intermittent immersion in relatively
quiet, nonabrasive fresh water.
For atmospheric exposures only, systems No. 3-Z and
6-Z-A are considered equivalent and may be
interchanged by the project specification writer.
Systems No. 3-Z and 6-Z-A may be used for steel
surfaces exposed in normal and industrial
atmospheres when a longer service life than would be
provided by systems No. 2-Z or 5-Z-A is desired.
System No. 6-Z-A is intended primarily for use on
steel surfaces immersed in fresh waters.
System 6-Z-A is recommended for applications where a
coating that prevents zebra mussel fouling is
required.
System No. 7-A is recommended for use on steel
surfaces in marine (salt) atmospheric exposures.
Metallizing system No. 8-A is recommended for use on
high-temperature steel at temperatures up to 900
degrees C (1,650 degrees F) and for steel immersed
in seawater. System No. 8-A may also be used for
extended service on marine (salt) atmospheric steel.
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The Contractor shall have the wire tested by a commercial laboratory or by
the manufacturer of the wire. Acceptance of metallizing wire is based on
the testing requirements described in AWS A5.01 Schedule H (chemical
analysis). The tested wire shall conform to the compositional requirements
specified in AWS C2.25/C2.25M for [99.99 Zinc][1100 Aluminum][85/15
Zinc-Aluminum] wire. The Contractor shall submit a report of the test
results.
2.2
SEALER AND PAINT
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NOTE: See paragraph SPECIAL PAINTING INSTRUCTIONS
SECTION 09971A
Page 19
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