ASTM B117-09

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Designation:B117–09
Standard Practice for
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Operating Salt Spray (Fog) Apparatus
This standard is issued under the fixed designation B117; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope G85 Practice for Modified Salt Spray (Fog) Testing
1.1 This practice covers the apparatus, procedure, and
3. Significance and Use
conditions required to create and maintain the salt spray (fog)
3.1 This practice provides a controlled corrosive environ-
test environment. Suitable apparatus which may be used is
ment which has been utilized to produce relative corrosion
described in Appendix X1.
resistance information for specimens of metals and coated
1.2 This practice does not prescribe the type of test speci-
metals exposed in a given test chamber.
men or exposure periods to be used for a specific product, nor
3.2 Prediction of performance in natural environments has
the interpretation to be given to the results.
seldom been correlated with salt spray results when used as
1.3 The values stated in SI units are to be regarded as the
stand alone data.
standard. The values given in parentheses are for information
3.2.1 Correlation and extrapolation of corrosion perfor-
only.
mance based on exposure to the test environment provided by
1.4 This standard does not purport to address all of the
this practice are not always predictable.
safety concerns, if any, associated with its use. It is the
3.2.2 Correlation and extrapolation should be considered
responsibility of the user of this standard to establish appro-
only in cases where appropriate corroborating long-term atmo-
priate safety and health practices and determine the applica-
spheric exposures have been conducted.
bility of regulatory limitations prior to use.
3.3 The reproducibility of results in the salt spray exposure
2. Referenced Documents is highly dependent on the type of specimens tested and the
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evaluation criteria selected, as well as the control of the
2.1 ASTM Standards:
operating variables. In any testing program, sufficient repli-
B368 Test Method for Copper-AcceleratedAceticAcid-Salt
cates should be included to establish the variability of the
Spray (Fog) Testing (CASS Test)
results. Variability has been observed when similar specimens
D609 Practice for Preparation of Cold-Rolled Steel Panels
are tested in different fog chambers even though the testing
for Testing Paint, Varnish, Conversion Coatings, and
conditions are nominally similar and within the ranges speci-
Related Coating Products
fied in this practice.
D1193 Specification for Reagent Water
D1654 Test Method for Evaluation of Painted or Coated
4. Apparatus
Specimens Subjected to Corrosive Environments
4.1 The apparatus required for salt spray (fog) exposure
E70 Test Method for pH of Aqueous Solutions With the
consists of a fog chamber, a salt solution reservoir, a supply of
Glass Electrode
suitably conditioned compressed air, one or more atomizing
E691 Practice for Conducting an Interlaboratory Study to
nozzles, specimen supports, provision for heating the chamber,
Determine the Precision of a Test Method
and necessary means of control. The size and detailed con-
struction of the apparatus are optional, provided the conditions
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This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
obtained meet the requirements of this practice.
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
4.2 Drops of solution which accumulate on the ceiling or
Corrosion Tests.
cover of the chamber shall not be permitted to fall on the
Current edition approved July 1, 2009. Published October 2009. Originally
approved in 1939. Last previous edition approved in 2007 as B117–07a. DOI: specimens being exposed.
10.1520/B0117-09.
4.3 Drops of solution which fall from the specimens shall
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
not be returned to the solution reservoir for respraying.
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
the ASTM website.
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B117–09
4.4 Material of construction shall be such that it will not 7.1.3 Each specimen shall be placed to permit unencum-
affect the corrosiveness of the fog. bered exposure to the fog.
4.5 AllwaterusedforthispracticeshallconformtoTy
...