ASTM D3361-93

Standard Practice for Unfiltered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings

SCOPE
1.1 This practice covers the selection of test conditions for accelerated exposure testing of coatings and related products in unfiltered open-flame carbon-arc devices conducted according to Practice G 151. This practice also covers the preparation of test specimens, the test conditions suited for coatings, and the evaluation of test results.Note 1--Previous versions of this practice referenced carbon-arc devices described by Practice G 23, which described very specific equipment designs. Practice G 23 has been withdrawn and replaced by Practice G 151, which describes performance criteria for all exposure devices that use laboratory light sources.
1.2 This practice covers unfiltered open-flame carbon-arc exposures of paints and related coatings, and covers the exposure cycle that has been commonly referred to as the "dew cycle." Practice D 822 describes filtered open-flame carbon-arc devices, and Practice D 5031 describes enclosed carbon-arc exposures. The radiation from an unfiltered open-flame carbon arc produces shorter wavelengths and higher levels of short wavelength radiation than either filtered open-flame or enclosed carbon arcs.
1.3 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.

General Information

• Status: Historical
• Publication Date: 09-Jul-2001
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.27 - Accelerated Testing

Relations

• Replaced By: ASTM D3361-01 - Standard Practice for Unfiltered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings
• Effective Date: 10-Jul-2001
• Referred By: ASTM D3794-22 - Standard Guide for Testing Coil Coatings
• Effective Date: 10-Jul-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3361 – 93
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 Practice for
Operating Light- and Water-Exposure Apparatus (Unfiltered
Open-Flame Carbon-Arc Type) for Testing Paint, Varnish,
Lacquer, and Related Products Using the Dew Cycle
This standard is issued under the fixed designation D 3361; 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 D 822 Practice for Conducting Tests on Paint and Related
Coatings and Materials Using Filtered Open-Flame
1.1 This practice covers the specific variations in test
Carbon-Arc Light- and Water-Exposure Apparatus
conditions that are applicable when Method 2 in Practice G 23
D 823 Test Methods for Producing Films of Uniform Thick-
is employed for the exposure of paint and related coatings and
ness of Paint, Varnish, Lacquer, and Related Products on
materials using the dew cycle with unfiltered open-flame
Test Panels
carbon arc.
D 1005 Test Methods for Measurement of Dry-Film Thick-
NOTE 1—Another procedure for exposing these products is covered by 2
ness of Organic Coatings Using Micrometers
Practice D 822 in which specimens are subjected to radiation from the
D 1186 Test Methods for Nondestructive Measurement of
filtered open-flame carbon arc. The filters in Practice D 822 remove some
Dry Film Thickness of Nonmagnetic Coatings Applied to
of the shorter wavelength ultraviolet radiation not normally received at the
a Ferrous Base
earth’s surface.
D 1212 Test Methods for Measurement of Wet Film Thick-
1.2 This standard does not purport to address all of the
ness of Organic Coatings
safety problems, if any, associated with its use. It is the
D 1400 Test Method for Nondestructive Measurement of
responsibility of the user of this standard to establish appro-
Dry Film Thickness of Nonconductive Coatings Applied to
priate safety and health practices and determine the applica-
a Nonferrous Metal Base
bility of regulatory limitations prior to use.
D 1729 Practice for Visual Evaluation of Color Differences
of Opaque Materials
2. Referenced Documents
D 1730 Practices for Preparation of Aluminum and
2.1 ASTM Standards:
Aluminum-Alloy Surfaces for Painting
D 523 Test Method for Specular Gloss
D 1731 Practices for Preparation of Hot-Dip Aluminum
D 609 Practice for Preparation of Cold-Rolled Steel Panels
Surfaces for Painting
for Testing Paint, Varnish, Conversion Coatings, and
D 1732 Practices for Preparation of Magnesium Alloy Sur-
Related Coating Products
faces for Painting
D 610 Test Method for Evaluating Degree of Rusting on
D 2092 Practices for Preparation of Zinc-Coated (Galva-
Painted Steel Surfaces
nized) Steel Surfaces for Painting
D 660 Test Method for Evaluating Degree of Checking of
D 2244 Test Method for Calculation of Color Differences
Exterior Paints
from Instrumentally Measured Color Coordinates
D 661 Test Method for Evaluating Degree of Cracking of
D 2616 Test Method for Evaluation of Visual Color Differ-
Exterior Paints
ence with a Gray Scale
D 662 Test Method for Evaluating Degree of Erosion of
D 4214 Test Methods for Evaluating Degree of Chalking of
Exterior Paints
Exterior Paint Films
D 714 Test Method for Evaluating Degree of Blistering of
D 4587 Practice for Conducting Tests on Paint and Related
Paints
Coatings and Materials Using a Fluorescent UV-
D 772 Test Method for Evaluating Degree of Flaking (Scal-
Condensation Light-and-Water Exposure Apparatus
ing) of Exterior Paints
E 97 Test Method for Directional Reflectance Factor, 45-
deg 0-deg, of Opaque Specimens by Broad-Band Filter
Reflectometry
This practice is under the jurisdiction of ASTM Committee D-1 on Paint and
G 23 Practice for Operating Light-Exposure Apparatus
Related Coatings, Materials, and Applications and is the direct responsibility of
(Carbon-Arc Type) With and Without Water for Exposure
Subcommittee D01.27 on Accelerated Testing.
Current edition approved Oct. 15, 1993. Published December 1993. Originally
published as D 3361 – 74. Last previous edition D 3361 – 87.
2 4
Annual Book of ASTM Standards, Vol 06.01. Annual Book of ASTM Standards, Vol 02.05.
3 5
Annual Book of ASTM Standards, Vol 06.02. Discontinued; see 1992 Annual Book of ASTM Standards, Vol 14.02.
D 3361
of Nonmetallic Materials but users of old equipment must be certain to turn the operate
G 26 Practice for Operating Light-Exposure Apparatus switch off before opening the test chamber door.
(Xenon-Arc Type) With and Without Water for Exposure 5.2 This light source generates ozone and nitrous oxides.
of Nonmetallic Materials Exhaust from the cabinet should be vented to the atmosphere.
6. Test Specimens
3. Significance and Use
6.1 Unless otherwise agreed upon, choose panels that meet
3.1 Organic coatings on exterior exposure are subjected to
the applicable base panel requirements specified in Practices
attack by degrading elements of the weather, particularly
D 609, D 1730, D 1731, D 1732, or D 2092. Select panel sizes
ultraviolet light, oxygen, and water. This practice may be used
suitable for exhibiting the failure mode to be observed.
for evaluating the behavior of films exposed in apparatus that
6.2 Apply the coatings to flat panels with the base panel
produces ultraviolet radiation, high temperatures, and water
material, method of application, coating system, film thickness,
condensation on the films. However, light sources, such as the
and method of drying consistent with the anticipated end use,
carbon arc, that emit a significant amount of radiation at
or as mutually agreed upon between the producer and the user.
wavelengths shorter than those in natural sunlight, may cause
6.3 Unless otherwise agreed upon, coat test panels in
results that lead to unrealistic evaluations of weathering
accordance with Test Methods D 823 and measure the film
...