708.01
Inorganic Zinc Silicate Primer Paint. Provide inorganic zinc silicate
primer paint conforming to AASHTO
M 300, Type I, and the following modification:
5.1 A green
colorant approximately No. 34159 of FS 595B.
Follow
the submittal requirements of Supplement 1084
to obtain approval of materials conforming to this specification.
Once
the Director approves the paint, the Department will not require further
performance testing by the manufacturer unless the formulation or manufacturing
process has been changed, in which case the Department will require new
certified test results.
Furnish
materials certified according to S 1084
and listed on the Department’s Qualified
Products List (QPL)
708.02 OZEU
Structural Steel Paint. This specification covers the formulation and
testing of a three-coat structural steel paint system consisting of an organic
zinc prime coat, an epoxy intermediate coat, and a urethane finish coat
(OZEU). Material requirements for the respective coats are as follows:
A. General. For each lot of all coatings, furnish a coated
card (Drawdown card) that shows the color, gloss, and general appearance of the
material covered by the lot. Use a minimum card size of 3-inches by
5-inches. The color must match the color card furnished for the Contract
or order within visual limits determined by the Engineer. In case of
disagreement, provide test data according to ASTM D 2244 showing a color
difference of no greater than 2.0, ΔE* (CIE 1976 L*a*b*).
B. Organic Zinc Prime Coat. Provide an organic zinc prime coat consisting
of a zinc dust filled, two or three-component epoxy polyamide, and selected
additives as required. The coating shall also meet the following:
1.
Physical Requirements.
a. Total solids, % by
weight of paint, ASTM D 2369. 70
percent minimum.
b. Pigment, % by
weight of total solids, ASTM
D 2371.
83 percent minimum.
c. Total zinc dust, %
by weight of pigment.
ASTM D 521. 93 percent
minimum.
d. Total zinc, % by
weight of total solids (by calculation) ASTM D 521. 77
percent minimum.
e. Total solids, % by
volume, ASTM D 2697. 45
percent minimum.
f. Color. Greenish
gray, approximating FS-595B-34159, visual
comparison.
g. Pot life. SSPC-Paint 22, Section 5.5 with the
following exception: 6 hours minimum at 77+/-3 °F (25+/-2 °C) with no evidence
of gellation. The coating will be in a
free-flowing condition and easily sprayed.
2. Qualitative
Requirements.
a. Mixing. Section 6.1, SSPC-Paint 20 using only
a high shear (Jiffy) mixer.
b. Storage Life. Section 6.3, SSPC-Paint 20.
c. Mudcracking. Section 7.1, SSPC-Paint 20.
3.
Material Quality Assurance. Analysis
for each component.
Material
Quality Assurance will conform to the requirements of Supplement 1084.
C. Epoxy Intermediate Coat. Provide a two-part epoxy intermediate coat
composed of a base component and curing agent suitable for application over the
zinc rich primer.
The base component
shall contain an epoxy resin together with color pigments, mineral fillers, gellant, leveling agent, and volatile solvents. The
curing agent component will contain a liquid polyamide resin and volatile
solvent. The coating shall also meet the following:
1. Physical
Requirements.
a. Color. White,
meeting or exceeding, FS-595B-37875 according to ASTM E 1347.
b. Components. Two,
mixed before application.
c. Volume solids, ASTM D 2697. 50
percent minimum.
d. Pot life.
SSPC-Paint 22, Section 5.5 with
the following exception: 6 hours minimum at 77+/-3 °F (25+/-2 °C) with no
evidence of gellation. The coating shall be in
a free-flowing condition and easily sprayed
e. Curing time.
(1) Set-to-touch, ASTM D 1640. 4 hours, maximum at
77 °F (25 °C).
(2) Dry-to-recoat, ASTM D 1640. 24 hours, maximum at
77 °F (25 °C).
(3) Full cure.
7 days, maximum at 50 °F (10 °C).
No pick-up when
rubbed with a cloth soaked in Methyl Ethyl Ketone.
f. Fineness of
grind, ASTM D 1210. Hegman 3 minimum.
g. Volatile Organic
Compounds (VOC), maximum, ASTM D 3960. 2.83
lb/gal(340 g/L), as applied.
2. Material Quality
Assurance. Material
Quality Assurance will conform to the requirements of Supplement 1084.
D. Urethane Finish Coat. Provide a two-component urethane finish coat composed
of a polyester and/or acrylic aliphatic urethane and suitable for use as a
finish coat over the white epoxy polyamide intermediate coat. The coating
shall also meet the following:
1. Physical
Requirements.
a. Finish, Specular
gloss, ASTM D 523. Use Fed Std 595B-16440 Gray: 70 % minimum after 3000 hours
weathering resistance. Color change less than 2.0 ΔE*,
(C.I.E 1976 L*a*b*) ASTM D2244.
b. Volume solids, ASTM D 2697. 42
percent minimum.
c. Curing time, at 77
°F (25 °C) and 50% RH. Set-to-touch, ASTM D 1640: 30
minutes, minimum; 4 hours, maximum.
d. Pot life.
SSPC-Paint 22, Section 5.5 with the following exception: 4 hours minimum at
77+/-3 °F (25+/-2 °C) with no evidence of gellation.
The coating shall be in a free-flowing condition and easily sprayed
e. Volatile Organic
Compounds (VOC), maximum, ASTM D 3960. 2.83
lb/gal(340 g/L), as applied.
f. Colors.
(1)
Specified.[2]
Brown |
FS-595B, 10324 |
Green |
FS-595B, 14277 |
Blue |
FS-595B, 15526 |
[2] Contractor’s choice unless specified on plans |
(2)
Elective. As specified on the plans.
g. Gloss requirements, ASTM D 523.
Full gloss |
minimum 80% unless specified on the plans |
Semi-gloss |
30 to 45% |
Lusterless (Matte) |
maximum 6% |
2.
Material Quality Assurance. Material
Quality Assurance will conform to the requirements of Supplement 1084.
Performance
Requirements.
Test the coating system, which consists of the organic zinc prime coat, the
epoxy intermediate coat, and the urethane topcoat, prior to use.
Prepare
three panels for each of the specified tests according to ASTM D 609, except provide a
minimum thickness of 1/8 inch (3 mm) and use ASTM A 36/A 36M hot rolled
steel. Blast clean (using coal slag abrasive) the surface to equal, as
nearly as is practical, the standard Sa 2 1/2 of ASTM D 2200 (Steel
Structures Painting Council SSPC-SP10 meets this requirement). Ensure
that the surface has a nominal height of profile of 1 to 3.5 mils (25 to 88 mm)
verified by using appropriate replica tape. Coat and cure the panels
according to the manufacturer’s printed instructions. Provide a dry film
coating thickness for the system to be tested as follows:
Organic Zinc: |
3.0 to 5.0 mils (75 to 125 mm) |
Epoxy: |
5.0 to 7.0 mils (125 to 175 mm) |
Urethane: |
2.0 to 4.0 mils (50 to 100 mm) |
The coating
system shall pass each of the following tests:
A.
Fresh Water Resistance Test (ASTM
D 870). Scribe the panels
according to ASTM D 1654
to the depth of the base metal in the form of an “X” having at least 2-inch (50
mm) legs, and immerse panels in fresh tap water at 75 ± 5 °F (25 ± 3 °C).
After 30 days of immersion, examine the panels to verify that they show no
rusting and that the coating shows no blistering, softening, or
discoloration. Rate blistering according to ASTM D 714.
B.
Salt Water Resistance Test (ASTM
D 870). Scribe the panels
as specified in “A” above, and immersed panels in a water solution of 5 percent
sodium chloride at 75 ± 5 °F (25 ± 3 °C). After 7, 14, and 30 days of
immersion, examine the panels to verify that they show no rusting and that the
coating shows no blistering or softening. Rate blistering according to ASTM D 714. Replace the
sodium chloride solution with a fresh solution after examination at 7 and 14
days.
C.
Weathering Resistance Test.
Test the panels according ASTM
D 4587, Method D, using Ultra Violet A 340 bulbs. Place the panels on
test at the beginning of a wet cycle. After 3000 hours of continuous
exposure, examine the panels to verify that they show no rusting and that the
coating shows no blistering or loss of adhesion. Perform the 60 degree
specular gloss measurements on the sprayed panels utilized for this test.
Average the three initial measurements (one per panel) together. Also,
average the three final measurements together.
D.
Salt Fog Resistance Test.
Scribe the panels as specified in “A” above, and test them according to ASTM B 117. After 3000
hours of continuous exposure, examine the coating to verify that it shows no
loss of bond and that it shows no rusting or blistering beyond 1/16 inch (2 mm)
from the center of the scribe mark. Rate blistering according to ASTM D 714.
E.
Adhesion Test, ASTM D 4541
Type IV. Test the panels according
to the following:
1.
Lightly sand the coating surface and aluminum dolly, and apply a quick set
adhesive.
2.
Allow adhesive to cure overnight.
3.
Scribe the coating and adhesive around the dolly before testing.
4.
Make a minimum of 4 trials to failure, and report the 4 trials. Ensure
that each trial is greater than 400 pounds per square inch
(2.8 MPa). Reject trial if fracture at the primer-blast interface
occurs.
Prequalification.
Before approval, submit copies of the manufacturer’s certified test data
showing that the coating system complies with the performance requirements of
this specification to the Laboratory Ensure that the certified test data
also states the following physical properties for each coating: Density,
pounds per gallon (g/mL); Solids, percent by weight; Solids, percent by volume;
Viscosity; Drying time; and VOC content, pounds per
gallon (g/mL).
Use
an independent testing laboratory, approved by the Laboratory, to develop the
test data. Include with the test data the brand name of the paint, name
of manufacturer, number of lots tested, and date of manufacture.
Once
the Director approves the coating, the Department will not require further
performance testing by the manufacturer unless the formulation or manufacturing
process has been changed, in which case the Department will require new
certified test results.
Sampling.
The Laboratory will establish acceptance variances.
Furnish
materials certified according to S 1084
and listed on the Department’s Qualified
Products List (QPL).