ASTM D5009-02(2011)
(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)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D5009 − 02 (Reapproved 2011)
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 SprayApplication Using Flammable and Combus-
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
as Procedure B.
3.1.5 mass of paint solids, n—the difference in the mass of
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—theratioofthemassofthepaint
1.5 This standard does not purport to address all of the
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-
priate safety and health practices and determine the applica-
3.1.7 weight percent solids, n—the solids content in percent
bility of regulatory limitations prior to use. For specific hazard
of the total weight of a sample of the paint used during the test.
statements, see Section 7 and 8.11.9 and 8.13.2.
4. Summary of Test Method
2. Referenced Documents
4.1 Metal panels covered with preweighed aluminum foil
2.1 ASTM Standards:
areconveyedinasprayboothpastafixedspraygun.Thecoated
D1200 Test Method for Viscosity by Ford Viscosity Cup
foils are then baked to remove volatile matter. The transfer
D2369 Test Method for Volatile Content of Coatings
efficiency is calculated on a weight basis using the solids
content and quantity of the paint sprayed and the amount of
1 solids on the coated aluminum foil target.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products. 5. Significance and Use
Current edition approved June 1, 2011. Published June 2011. Originally
5.1 Subjecttothelimitationslistedabove,theprocedurecan
approved in 1996. Last previous edition approved in 2005 as D5009 – 02 (2005).
DOI: 10.1520/D5009-02R11. be used as a research tool to optimize spray equipment and
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 (2011)
paint formulations as well as to study the relative effect on 8. Procedure
transfer efficiency of changing operating variables, spray
8.1 Set up the spray apparatus paint supply and the mass
application equipment, and types of coatings.
flow measurement equipment in accordance with the manufac-
turer’s instructions.
6. Apparatus
8.1.1 In accordance with Chapter 9-11 of NFPA 33, all
electrically conductive objects in the spray area, except those
6.1 Laboratory Scale, accurate to 60.001 g for weight
objects required by the process to be at high voltage, shall be
percent solids determination.
adequately grounded.
6.2 Platform Scale, accurate, or equivalent, to 60.01 g for
8.2 Agitate paint in a closed container at least 30 min before
mass of foil, mass of foil plus paint, and mass flow rate
any paint samples are taken.
instrumentation calibration.
8.3 Using an airtight container take a paint grab sample
6.3 Mass Flow Rate Meter, or mass flow rate determination
from the paint pot in accordance with Practice D3925.
method, accurate to 62 % of the mass flow rate to be used
8.4 Determine and record the following from the paint
during the test.
sample:
6.4 Conveyor Timer or conveyor timing method, accurate to
8.4.1 Viscosity determined in accordance with Test Method
61 % of the conveyor speed to be used during the test. The
D1200.
equipment may consist of photoelectric cells or limit switches
8.4.2 Weight percent solids determined in accordance with
used in conjunction with a digital timer or timing marks on the
Test Method D2369. If the baking temperature in Test Method
conveyor used in conjunction with a stopwatch. Take at least
D2369isinadequate,usethemanufacturersrecommendedcure
two readings with a stopwatch and average the readings.
schedule.
8.4.3 Resistivity for the samples being applied electrostati-
6.5 Targets, consisting of a set of ten steel panels 15.2 cm (6
cally (An ASTM method is under development).
in.) wide by 0.15875 cm (0.0625 in.) with 0.635-cm (0.25-in.)
radius corners. A minimum panel length of 121.9 cm (48 in.)
8.5 Set up the conveyor speed measuring equipment.
should be used. The length of the panel should be set so that a
8.6 Cut the aluminum foil to dimensions of 38 cm (15 in.)
minimum of 30.4 cm (12 in.) above and below the spray
by approximately 127 cm (50 in.) or 5 cm (2 in.) longer than
pattern is achieved.
the length of the target panel.
6.5.1 It is essential to do this so that the entire height of the
8.7 Consecutively number each precut foil strip before
spray pattern is effectively captured.
weighing using a permanent marking pen.
6.6 Aluminum Foil, medium temper or equivalent, 1.5 mil
8.8 Weigh each test foil strip and record the uncoated
(0.0037 cm) thick.
weight and the foil number.
6.7 Back-Draw Water Wash Spray Booth,orequivalent.The
8.9 Attach the preweighed, labeled test foil to six targets
booth should be a minimum of 1.8 m (6 ft) wide and capable
using the technique shown in Fig. 1. Attach the unlabeled foil
of up to 0.61 m/s (120 ft/min) air velocity in the middle at the
on four scavenger targets as shown in Fig. 1.
plane of the target. If a dry filter booth is used, filters should be
8.10 Mount the foil covered targets in consecutive order as
changed as necessary to maintain uniform air velocity.
shown in Fig. 2, with the foil seam on each target facing away
6.8 Adjustable Rate Overhead Conveyor System, capable of
from the spray gun.
hanging targets as specified, and capable of up to 0.20 m/s (40
8.10.1 Ifelectrostaticequipmentisbeingusedtheresistance
ft/min) or the maximum speed desired by the user.
shall be less t
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