ASTM D5894-16

Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)

SIGNIFICANCE AND USE
5.1 The outdoor corrosion of painted metals is influenced by many factors, including: corrosive atmospheres, rain, condensed dew, UV light, wet/dry cycling, and temperature cycling. These factors frequently have a synergistic effect on one another. This practice is intended to provide a more realistic simulation of the interaction of these factors than is found in traditional tests with continuous exposure to a static set of corrosive conditions.  
5.2 Results obtained from this practice can be used to compare the relative durability of materials subjected to the specific test cycle used.  
5.3 No single exposure test can be specified as a complete simulation of actual use conditions in outdoor environments. Results obtained from exposures conducted according to this practice can be considered as representative of actual outdoor exposures only when the degree of rank correlation has been established for the specific materials being tested. The relative durability of materials in actual outdoor service can be very different in different locations because of differences in UV radiation, time of wetness, temperature, pollutants, and other factors. Therefore, even if results from a specific artificial test condition are found to be useful for comparing the relative durability of materials exposed in a particular exterior environment, it cannot be assumed that they will be useful for determining relative durability for a different environment.  
5.4 Even though it is very tempting, it is not recommended to calculate an “acceleration factor” relating x hours of laboratory exposure to y months of exterior exposure. Different materials and different formulations of the same material can have significantly different acceleration factors. The acceleration factor also varies depending on the variability in rate of degradation in the laboratory test and in actual outdoor exposure.  
5.5 This practice is best used to compare the relative performance of materials tested at th...
SCOPE
1.1 This practice covers basic principles and operating practice for cyclic corrosion/UV exposure of paints on metal, using alternating periods of exposure in two different cabinets: a cycling salt fog/dry cabinet, and a fluorescent UV/condensation cabinet.  
1.2 This practice is limited to the methods of obtaining, measuring, and controlling exposure conditions, and procedures. It does not specify specimen preparation nor evaluation of results.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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: 31-Mar-2016
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.27 - Accelerated Testing

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5894 − 16
Standard Practice for
Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating
Exposures in a Fog/Dry Cabinet and a UV/Condensation
1
Cabinet)
This standard is issued under the fixed designation D5894; 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* G113 Terminology Relating to Natural andArtificial Weath-
ering Tests of Nonmetallic Materials
1.1 This practice covers basic principles and operating
G147 Practice for Conditioning and Handling of Nonmetal-
practice for cyclic corrosion/UV exposure of paints on metal,
lic Materials for Natural and Artificial Weathering Tests
using alternating periods of exposure in two different cabinets:
G151 Practice for Exposing Nonmetallic Materials inAccel-
a cycling salt fog/dry cabinet, and a fluorescent UV/
erated Test Devices that Use Laboratory Light Sources
condensation cabinet.
G154 Practice for Operating Fluorescent Ultraviolet (UV)
1.2 This practice is limited to the methods of obtaining,
Lamp Apparatus for Exposure of Nonmetallic Materials
measuring, and controlling exposure conditions, and proce-
dures. It does not specify specimen preparation nor evaluation
3. Terminology
of results.
3.1 Definitions—ThedefinitionsgiveninTerminologyG113
1.3 The values stated in SI units are to be regarded as
are applicable to this practice.
standard. No other units of measurement are included in this
standard.
4. Summary of Practice
1.4 This standard does not purport to address all of the
4.1 The test specimens are exposed to alternating periods of
safety concerns, if any, associated with its use. It is the
one week in a fluorescent UV/condensation chamber followed
responsibility of the user of this standard to establish appro-
by one week in a cyclic salt fog/dry chamber. The fluorescent
2
priate safety and health practices and determine the applica-
UV/condensation cycle is 4-h UV at 0.89 W/(m · nm) at 340
bility of regulatory limitations prior to use.
nm at 60°C followed by 4-h condensation at 50°C, using
UVA-340 lamps. The fog/dry chamber runs a cycle of 1-h fog
2. Referenced Documents
at ambient temperature and 1-h dry-off at 35°C. The fog
2
2.1 ASTM Standards: electrolyte is a relatively dilute solution, with 0.05 % sodium
D610 Practice for Evaluating Degree of Rusting on Painted chloride and 0.35 % ammonium sulfate.
Steel Surfaces
5. Significance and Use
D714 Test Method for Evaluating Degree of Blistering of
Paints
5.1 Theoutdoorcorrosionofpaintedmetalsisinfluencedby
D1654 Test Method for Evaluation of Painted or Coated
many factors, including: corrosive atmospheres, rain, con-
Specimens Subjected to Corrosive Environments
densed dew, UV light, wet/dry cycling, and temperature
D4587 Practice for Fluorescent UV-Condensation Expo-
cycling. These factors frequently have a synergistic effect on
sures of Paint and Related Coatings
one another. This practice is intended to provide a more
G85 Practice for Modified Salt Spray (Fog) Testing
realistic simulation of the interaction of these factors than is
found in traditional tests with continuous exposure to a static
set of corrosive conditions.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
5.2 Results obtained from this practice can be used to
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.27 on Accelerated Testing.
compare the relative durability of materials subjected to the
Current edition approved April 1, 2016. Published May 2016. Originally
specific test cycle used.
approved in 1996. Last previous edition approved in 2010 as D5894 – 10. DOI:
10.1520/D5894-16.
5.3 No single exposure test can be specified as a complete
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
simulation of actual use conditions in outdoor environments.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Results obtained from exposures conducted according to this
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. practice can be considered as representative of actual outdoor
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5894 − 16
exposures only when the degree of rank correlation has been 7. Test Specimens
established for the specific materials being tested. The relative
7.1 The composition and preparation of the substrate, speci-
durability of material
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5894 − 10 D5894 − 16
Standard Practice for
Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating
Exposures in a Fog/Dry Cabinet and a UV/Condensation
1
Cabinet)
This standard is issued under the fixed designation D5894; 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*
1.1 This practice covers basic principles and operating practice for cyclic corrosion/UV exposure of paints on metal, using
alternating periods of exposure in two different cabinets: a cycling salt fog/dry cabinet, and a fluorescent UV/condensation cabinet.
1.2 This practice is limited to the methods of obtaining, measuring, and controlling exposure conditions, and procedures. It does
not specify specimen preparation nor evaluation of results.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D610 Practice for Evaluating Degree of Rusting on Painted Steel Surfaces
D714 Test Method for Evaluating Degree of Blistering of Paints
D1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
D4587 Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings
G85 Practice for Modified Salt Spray (Fog) Testing
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G152 Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials
G154 Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials
3. Terminology
3.1 Definitions—The definitions given in Terminology G113 are applicable to this practice.
4. Summary of Practice
4.1 The test specimens are exposed to alternating periods of one week in a fluorescent UV/condensation chamber and followed
2
by one week in a cyclic salt fog/dry chamber. The fluorescent UV/condensation cycle is 4-h UV at 0.89 W/(m · nm) at 340 nm
at 60°C and followed by 4-h condensation at 50°C, using UVA-340 lamps. The fog/dry chamber runs a cycle of 1-h fog at ambient
temperature and 1-h dry-off at 35°C. The fog electrolyte is a relatively dilute solution, with 0.05 % sodium chloride and 0.35 %
ammonium sulfate.
NOTE 1—The irradiance target setpoint of 0.89 is based upon actual irradiance levels that have been historically widely used for coatings.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.27 on Accelerated Testing.
Current edition approved Dec. 1, 2010April 1, 2016. Published January 2011May 2016. Originally approved in 1996. Last previous edition approved in 20052010 as
D5894 – 05.D5894 – 10. DOI: 10.1520/D5894-10.10.1520/D5894-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5894 − 16
5. Significance and Use
5.1 The outdoor corrosion of painted metals is influenced by many factors, including: corrosive atmospheres, rain, condensed
dew, UV light, wet/dry cycling, and temperature cycling. These factors frequently have a synergistic effect on one another. This
practice is intended to provide a more realistic simulation of the interaction of these factors than is found
...