ASTM D1735-99

Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus

SCOPE
1.1 This practice covers the basic principles and operating procedures for testing water resistance of coatings in an apparatus similar to that used for salt spray testing.  
1.2 This practice is limited to the methods of obtaining, measuring, and controlling the conditions and procedures of water fog tests. It does not specify specimen preparation, specific test conditions, or evaluation of results.  Note 1-Alternative practices for testing the water resistance of coatings include Practices D870, D2247, and D4585.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.>

General Information

• Status: Historical
• Publication Date: 09-Dec-1999
• ICS: 25.220.20 - Surface treatment
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.27 - Accelerated Testing

Relations

• Replaced By: ASTM D1735-02 - Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus
• Effective Date: 10-Aug-2002

Standards Content (Sample)

Designation: D 1735 – 99
Standard Practice for
Testing Water Resistance of Coatings Using Water Fog
1
Apparatus
This standard is issued under the fixed designation D 1735; 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.
6
1. Scope Aluminum-Alloy Surfaces for Painting
D 2247 Practice for Testing Water Resistance of Coatings in
1.1 This practice covers the basic principles and operating
3
100 % Relative Humidity
procedures for testing water resistance of coatings in an
D 2616 Test Method for Evaluation of Visual Color Differ-
apparatus similar to that used for salt spray testing.
3
ence With a Gray Scale
1.2 This practice is limited to the methods of obtaining,
3
D 3359 Test Method for Measuring Adhesion by Tape Test
measuring, and controlling the conditions and procedures of
3
D 3363 Test Method for Film Hardness by Pencil Test
water fog tests. It does not specify specimen preparation,
D 4541 Test Method for Pull-Off Strength of Coatings
specific test conditions, or evaluation of results.
4
Using Portable Adhesion Testers
NOTE 1—Alternative practices for testing the water resistance of
D 4585 Practice for Testing Water Resistance of Coatings
coatings include Practices D 870, D 2247, and D 4585.
3
Using Controlled Condensation
1.3 This standard does not purport to address all of the
3. Summary of Practice
safety concerns, if any, associated with its use. It is the
responsibility of whoever uses this standard to consult and
3.1 Coated specimens are placed in an enclosed chamber to
establish appropriate safety and health practices and deter-
permit free settling of fog on all specimens. The temperature of
mine the applicability of regulatory limitations prior to use.
the chamber is usually maintained at 100°F (38°C). The
exposure condition is varied by selecting the duration of the
2. Referenced Documents
test. Water permeates the coating at rates that are dependent
2.1 ASTM Standards:
upon the characteristics of the coating. Any effects such as
2
B 117 Practice for Operating Salt Spray (Fog) Apparatus
color change, blisters, loss of adhesion, softening, or embrittle-
D 609 Practice for Preparation of Cold-Rolled Steel Panels
ment are observed and reported.
for Testing Paint, Varnish, Conversion Coatings, and
3
4. Significance and Use
Related Coating Products
D 610 Test Method for Evaluating Degree of Rusting on
4.1 Water can cause the degradation of coatings, so knowl-
4
Painted Steel Surfaces
edge of how a coating resists water is helpful in predicting its
D 714 Test Method for Evaluating Degree of Blistering of
service life. Failure in water fog tests may be caused by a
3
Paints
number of factors including a deficiency in the coating itself,
D 823 Practices for Producing Films of Uniform Thickness
contamination of the substrate, or inadequate surface prepara-
3
of Paint, Varnish, and Related Products on Test Panels
tion. The test is therefore useful for evaluating coatings alone
D 870 Practice for Testing Water Resistance of Coatings
or complete coating systems.
3
Using Water Immersion
4.2 Water fog tests are used for research and development of
5
D 1193 Specification for Reagent Water
coatings and substrate treatments, specification acceptance, and
D 1654 Test Method for Evaluation of Painted or Coated
quality control in manufacturing. These tests usually result in a
3
Specimens Subjected to Corrosive Environments
pass or fail determination but the degree of failure may also be
D 1730 Practices for Preparation of Aluminum and
measured. A coating system is considered to pass if there is no
evidence of water-related failure after a specified period of
time.
4.3 Results obtained from the use of water fog tests in
1
This practice is under the jurisdiction of ASTM Committee D-1 on Paint and
accordance with this practice should not be represented as
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.27 on Accelerated Testing.
being equivalent to a period of exposure to water in the natural
Current edition approved Dec. 10, 1999. Published February 2000. Originally
environment, until the degree of quantitative correlation has
published as D 1735 – 60 T. Last previous edition D 1735 – 97.
2 been established for the coating or coating system.
Annual Book of ASTM Standards, Vol 03.02
3
Annual Book of ASTM Standards, Vol 06.01.
4
Annual Book of ASTM Standards, Vol 06.02.
5 6
Annual Book of ASTM Standards, Vol 11.01. Annual Book of ASTM Standards, Vol 02.05.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 1735
4.4 The test apparatus is similar to that used in Practice nozzle. Place the other collectors at positions as far as
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