ASTM D5009-02(2005)
(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
SIGNIFICANCE AND USE
Subject to the limitations listed above, the procedure can be used as a research tool to optimize spray equipment and paint formulations as well as to study the relative effect on transfer efficiency of changing operating variables, spray application equipment, and types of coatings.
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 SI 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 7 and 8.11.9 and 8.13.2.
General Information
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Standards Content (Sample)
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Designation: D5009 – 02 (Reapproved 2005)
Standard Test Method for
Evaluating and Comparing Transfer Efficiency of Spray
Applied Coatings Under Laboratory Conditions
This standard is issued under the fixed designation D5009; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3925 Practice for Sampling Liquid Paints and Related
Pigmented Coatings
1.1 This test method covers the evaluation and comparison
2.2 National Fire Protection Association Documents
of the transfer efficiency of spray-applied coatings under
NFPA33 SprayApplicationUsingFlammableandCombus-
controlled laboratory conditions.
tible Materials
1.2 This test method has been shown to yield excellent
NFPA 86 Standard for Ovens and Furnaces
intralaboratory reproducibility. Interlaboratory precision is
poorerandishighlydependentoncloselycontrolledairflowin
3. Terminology
the spray booth, the rate at which the paint is delivered to the
3.1 Definitions of Terms Specific to This Standard:
part, and other variables suggested in the test method.
3.1.1 conveyor speed, n—the speed of the conveyor in
1.3 Limitations:
centimeters per minute during the test.
1.3.1 This laboratory procedure only indicates the direction
3.1.2 fluid mass flow rate, n—the mass flow rate of paint in
of the effect of spray variables on transfer efficiency. The
grams per minute during the test.
magnitude of the effect is determined only by specific plant
3.1.3 mass of foil, n—the weight of each target foil in grams
experience.
before being painted.
NOTE 1—This laboratory procedure requires specific equipment and
3.1.4 mass of foil plus paint solids, n—the weight of each
procedures. For those laboratories that do not have access to the type of
target foil in grams after being painted and baked.
equipment required a more general laboratory procedure is being prepared
3.1.5 mass of paint solids, n—the difference in the mass of
as Procedure B.
the foils before painting and the mass of the foils after painting
1.4 The values stated in SI units are to be regarded as the
and baking. This is the sum of the mass of the foil plus paint
standard. The values given in parentheses are for information
solids less the sum of the mass of the foil.
only.
3.1.6 transfer effıciency, n—the ratio of the mass of the
1.5 This standard does not purport to address all of the
paint solids deposited on the foil to the mass of the paint solids
safety concerns, if any, associated with its use. It is the
sprayed during the test expressed as a percent.
responsibility of the user of this standard to establish appro-
3.1.7 weight percent solids, n—the solids content in percent
priate safety and health practices and determine the applica-
of the total weight of a sample of the paint used during the test.
bility of regulatory limitations prior to use. For specific hazard
statements, see Section 7 and 8.11.9 and 8.13.2.
4. Summary of Test Method
4.1 Metal panels covered with preweighed aluminum foil
2. Referenced Documents
areconveyedinasprayboothpastafixedspraygun.Thecoated
2.1 ASTM Standards:
foils are then baked to remove volatile matter. The transfer
D1200 Test Method for Viscosity by Ford Viscosity Cup
efficiency is calculated on a weight basis using the solids
D2369 Test Method for Volatile Content of Coatings
content and quantity of the paint sprayed and the amount of
solids on the coated aluminum foil target.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
5. Significance and Use
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
5.1 Subjecttothelimitationslistedabove,theprocedurecan
Current edition approved May 15, 2005. Published July 2005. Originally
be used as a research tool to optimize spray equipment and
approved in 1996. Last previous edition approved in 2002 as D5009 – 02. DOI:
paint formulations as well as to study the relative effect on
10.1520/D5009-02R05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from National Fire Protection Association (NFPA), 1 Batterymarch
the ASTM website. Park, Quincy, MA 02269-9101.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5009 – 02 (2005)
transfer efficiency of changing operating variables, spray 8.2 Agitate paint in a closed container at least 30 min before
application equipment, and types of coatings. any paint samples are taken.
8.3 Using an airtight container take a paint grab sample
6. Apparatus
from the paint pot in accordance with Practice D3925.
6.1 Laboratory Scale, accurate to 60.001 g for weight
8.4 Determine and record the following from the paint
percent solids determination.
sample:
6.2 Platform Scale, accurate, or equivalent, to 60.01 g for
8.4.1 Viscosity determined in accordance with Test Method
mass of foil, mass of foil plus paint, and mass flow rate
D1200.
instrumentation calibration.
8.4.2 Weight percent solids determined in accordance with
6.3 Mass Flow Rate Meter, or mass flow rate determination
Test Method D2369. If the baking temperature in Test Method
method, accurate to 62 % of the mass flow rate to be used
D2369isinadequate,usethemanufacturersrecommendedcure
during the test.
schedule.
6.4 Conveyor Timer or conveyor timing method, accurate
8.4.3 Resistivity for the samples being applied electrostati-
to 61 % of the conveyor speed to be used during the test. The
cally (An ASTM method is under development).
equipment may consist of photoelectric cells or limit switches
8.5 Set up the conveyor speed measuring equipment.
used in conjunction with a digital timer or timing marks on the
8.6 Cut the aluminum foil to dimensions of 38 cm (15 in.)
conveyor used in conjunction with a stopwatch. Take at least
by approximately 127 cm (50 in.) or 5 cm (2 in.) longer than
two readings with a stopwatch and average the readings.
the length of the target panel.
6.5 Targets, consisting of a set of ten steel panels 15.2 cm (6
8.7 Consecutively number each precut foil strip before
in.) wide by 0.15875 cm (0.0625 in.) with 0.635-cm (0.25-in.)
weighing using a permanent marking pen.
radius corners. A minimum panel length of 121.9 cm (48 in.)
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
weight and the foil number.
minimum of 30.4 cm (12 in.) above and below the spray
8.9 Attach the preweighed, labeled test foil to six targets
pattern is achieved.
using the technique shown in Fig. 1. Attach the unlabeled foil
6.5.1 It is essential to do this so that the entire height of the
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,orequivalent.The
8.10.1 Ifelectrostaticequipmentisbeingusedtheresistance
booth should be a minimum of 1.8 m (6 ft) wide and capable 6
shall be less than 1 by 10 V between the target and the earth
of up to 0.61 m/s (120 ft/min) 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
changed as necessary to maintain uniform air velocity.
6.8 Adjustable Rate Overhead Conveyor System, capable of
hanging targets as specified, and capable of up to 0.20 m/s (40
ft/min) or the maximum speed desired by the user.
6.9 Forced Draft Curing Oven, of sufficient size for curing
targets, and capable of achieving and maintaining the cure
temperatures specified by the paint supplier
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