ASTM D5009-96
(Test Method)Standard Test Method for Evaluating and Comparing Transfer Efficiency of Spray Applied Coatings Under Laboratory Conditions
Standard Test Method for Evaluating and Comparing Transfer Efficiency of Spray Applied Coatings Under Laboratory Conditions
SCOPE
1.1 This test method covers the evaluation and comparison of the transfer efficiency of spray-applied coatings under controlled laboratory conditions.
1.2 This test method has been shown to yield excellent intralaboratory reproducibility. Interlaboratory precision is poorer and is highly dependent on closely controlled air flow in the spray booth, the rate at which the paint is delivered to the part, and other variables suggested in the test method.
1.3 Limitations
1.3.1 This laboratory procedure only indicates the direction of the effect of spray variables on transfer efficiency. The magnitude of the effect is determined only by specific plant experience.
Note 1—This laboratory procedure requires specific equipment and procedures. For those laboratories that do not have access to the type of equipment required a more general laboratory procedure is being prepared as Procedure B.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 9 and Note 2 and Note 3.
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Designation: D 5009 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Evaluating and Comparing Transfer Efficiency of Spray
Applied Coatings Under Laboratory Conditions
This standard is issued under the fixed designation D 5009; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope NFPA 33 Spray Application Using Flammable and Combus-
tible Materials
1.1 This test method covers the evaluation and comparison
NFPA 86 Standard for Ovens and Furnaces
of the transfer efficiency of spray-applied coatings under
controlled laboratory conditions.
3. Terminology
1.2 This test method has been shown to yield excellent
3.1 Definitions of Terms Specific to This Standard:
intralaboratory reproducibility. Interlaboratory precision is
3.1.1 conveyor speed—the speed of the conveyor in centi-
poorer and is highly dependent on closely controlled air flow in
meters per minute during the test.
the spray booth, the rate at which the paint is delivered to the
3.1.2 fluid mass flow rate—the mass flow rate of paint in
part, and other variables suggested in the test method.
grams per minute during the test.
1.3 Limitations:
3.1.3 mass of foil—the weight of each target foil in grams
1.3.1 This laboratory procedure only indicates the direction
before being painted.
of the effect of spray variables on transfer efficiency. The
3.1.4 mass of foil plus paint solids—the weight of each
magnitude of the effect is determined only by specific plant
target foil in grams after being painted and baked.
experience.
3.1.5 mass of paint solids—the difference in the mass of the
NOTE 1—This laboratory procedure requires specific equipment and
foils before painting and the mass of the foils after painting and
procedures. For those laboratories that do not have access to the type of
baking. This is the sum of the mass of the foil plus paint solids
equipment required a more general laboratory procedure is being prepared
less the sum of the mass of the foil.
as Procedure B.
3.1.6 transfer effıciency—the ratio of the mass of the paint
1.4 The values stated in inch-pound units are to be regarded
solids deposited on the foil to the mass of the paint solids
as the standard. The values given in parentheses are for
sprayed during the test expressed as a percent.
information only.
3.1.7 weight percent solids—the solids content in percent of
1.5 This standard does not purport to address all of the
the total weight of a sample of the paint used during the test.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 Metal panels covered with preweighed aluminum foil
bility of regulatory limitations prior to use. For specific hazard
are conveyed in a spraybooth past a fixed spraygun. The coated
statements, see Section 9 and Note 2 and Note 3.
foils are then baked to remove volatile matter. The transfer
efficiency is calculated on a weight basis using the solids
2. Referenced Documents
content and quantity of the paint sprayed and the amount of
2.1 ASTM Standards:
solids on the coated aluminum foil target.
D 1200 Test Method for Viscosity by Ford Viscosity Cup
D 2369 Test Method for Volatile Content of Coatings
5. Significance and Use
D 3925 Practice for Sampling Liquid Paints and Related
5.1 Subject to the limitations listed above, the procedure can
Pigmented Coatings
be used as a research tool to optimize spray equipment and
2.2 National Fire Protection Association Documents
paint formulations as well as to study the relative effect on
transfer efficiency of changing operating variables, spray
This test method is under the jurisdiction of ASTM Committee D-1 on Paint application equipment, and types of coatings.
and Related Coatings, Materials, and Applicationsand is the direct responsibility of
Subcommittee D01.55on Factory-Applied Coatings on Preformed Products.
6. Apparatus
Current edition approved Nov. 10, 1996. Published January 1997. Originally
6.1 Laboratory Scale, accurate to 60.001 g for weight
published as D 5009 – 89. Last previous edition D 5009 – 89.
Annual Book of ASTM Standards, Vol 06.01.
percent solids determination.
Available from National Fire Protection Assn., Battery March Park, Quincy,
6.2 Platform Scale, accurate, or equivalent, to 60.01 g for
MA 02269.
D 5009
mass of foil, mass of foil plus paint, and mass flow rate 8.4.1 Viscosity determined in accordance with Test Method
instrumentation calibration. D 1200.
8.4.2 Weight percent solids determined in accordance with
6.3 Mass Flow Rate Meter, or mass flow rate determination
method, accurate to 62 % of the mass flow rate to be used Test Method D 2369. If the baking temperature in Test Method
D 2369 is inadequate, use the manufacturers recommended
during the test.
6.4 Conveyor Timer or conveyor timing method, accurate cure schedule.
8.4.3 Resistivity for the samples being applied electrostati-
to6 1 % of the conveyor speed to be used during the test. The
equipment may consist of photoelectric cells or limit switches cally (An ASTM method is under development).
8.5 Set up the conveyor speed measuring equipment.
used in conjunction with a digital timer or timing marks on the
conveyor used in conjunction with a stopwatch. Take at least 8.6 Cut the aluminum foil to dimensions of 15 in. (38 cm)
by approximately 50 in. (127 cm) or 2 in. (5 cm) longer than
two readings with a stopwatch and average the readings.
6.5 Targets, consisting of a set of ten steel panels 6 in. (15.2 the length of the target panel.
8.7 Consecutively number each precut foil strip before
cm) wide by 0.0625 in. (0.15875 cm) with 0.25-in. (0.635-cm)
radius corners. A minimum panel length of 48 in. (121.9 cm) weighing using a permanent marking pen.
8.8 Weigh each test foil strip and record the uncoated
should be used. The length of the panel should be set so that a
minimum of 12 in. (30.4 cm) above and below the spray weight and the foil number.
8.9 Attach the preweighed, labeled test foil to six targets
pattern is achieved.
6.5.1 It is essential to do this so that the entire height of the using the technique shown in Fig. 1. Attach the unlabeled foil
on four scavenger targets as shown in Fig. 1.
spray pattern is effectively captured.
8.10 Mount the foil covered targets in consecutive order as
6.6 Aluminum Foil, medium temper or equivalent, 1.5 mil
shown in Fig. 2, with the foil seam on each target facing away
(0.0037 cm) thick.
from the spray gun.
6.7 Back-Draw Water Wash Spray Booth, or equivalent. The
8.10.1 If electrostatic equipment is being used the resistance
booth should be a minimum of 6 ft (1.8 m) wide and capable
shall be less than 1 by 10 V between the target and the earth
of up to 120 ft/min (0.61 m/s) air velocity in the middle at the
ground in accordance with Chapter 9-8 of NFPA 33.
plane of the target. If a dry filter booth is used, filters should be
8.11 Adjust the following equipment operating parameters
changed as necessary to maintain uniform air velocity.
to the values desired for testing:
6.8 Adjustable Rate Overhead Conveyor System, capable of
8.11.1 Paint fluid pressure (kilopascals) at spray gun.
hanging targets as specified, and capable of up to 40 ft/min
8.11.2 Atomizing air pressure (kilopascals) at spray gun.
(0.20 m/s) or the maximum speed desired by the user.
8.11.3 Rotating atomizer head speed (revolutions per
6.9 Forced Draft Curing
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