minimum average thickness of 0.3 mm 12.0 mils for the completed
system; the thickness at any one spot shall not be less than 0.25
mm 10.0 mils.
c.
System No. 3-Z: This metallizing system shall be applied to a
minimum average thickness of 0.4 mm 16.0 mils for the completed
system; the thickness at any one spot shall not be less than 0.32
mm 13.0 mils.
d.
System No. 4-Z-A: This metallizing system shall be applied to a
minimum average thickness of 0.15 mm 6.0 mils for the completed
system; the thickness at any one spot shall not be less than 0.12
mm 5.0 mils.
e.
System No. 5-Z-A: This metallizing system shall be applied to a
minimum average thickness of 0.3 mm 12.0 mils for the completed
system; the thickness at any one spot shall not be less than 0.25
mm 10.0 mils.
f.
System No. 6-Z-A: This metallizing system shall be applied to a
minimum average thickness of 0.4 mm 16.0 mils for the completed
system; the thickness at any one spot shall not be less than 0.32
mm 13.0 mils.
g.
System No. 7-A: This metallizing system shall be applied to a
minimum average thickness of 0.12 mm 5.0 mils for the completed
system and shall be not less than 0.10 mm 4.0 mils at any one spot.
h.
System No. 8-A: This metallizing system shall be applied to a
minimum average thickness of 0.25 mm 10.0 mils; the thickness
shall be not less than 0.20 mm 8.0 mils at any one spot.
3.2.4
Metallizing Adhesion
The average adhesion of the metallized coating shall not be less than [6.9
kPa 1000 psi for 85-15 zinc-aluminum alloy] [11.0 kPa 1600 psi for
aluminum] [5.2 kPa 750 psi for zinc]. No single adhesion measurement shall
have a value of less than 80-percent of the specified minimum average
adhesion.
3.2.5
Atmospheric and Surface Conditions
**************************************************************************
NOTE: Minimum and maximum application temperatures
should be specified for metallized coating-sealer
duplexes. The established limits for sealer and
paint topcoats should be specified for the entire
system. Vinyl sealers and paints are generally
limited to a minimum application temperature of 2
degrees C (35 degrees F). All other sealers and
topcoats have a minimum application temperature of
10 degrees C (50 degrees F). If no sealer or paint
is to be applied then the minimum application
temperature is unlimited, however, a practical limit
of 2 degrees C (35 degrees F) is recommended.
**************************************************************************
Metallic coatings shall be applied only to surfaces that are a minimum of 3
degrees C 5 degrees F above the dew point and that are completely free of
SECTION 09971A
Page 23
Previous Page
