ASTM B117-07a
(Practice)Standard Practice for Operating Salt Spray (Fog) Apparatus
Standard Practice for Operating Salt Spray (Fog) Apparatus
SIGNIFICANCE AND USE
This practice provides a controlled corrosive environment which has been utilized to produce relative corrosion resistance information for specimens of metals and coated metals exposed in a given test chamber.
Prediction of performance in natural environments has seldom been correlated with salt spray results when used as stand alone data.
Correlation and extrapolation of corrosion performance based on exposure to the test environment provided by this practice are not always predictable.
Correlation and extrapolation should be considered only in cases where appropriate corroborating long-term atmospheric exposures have been conducted.
The reproducibility of results in the salt spray exposure is highly dependent on the type of specimens tested and the evaluation criteria selected, as well as the control of the operating variables. In any testing program, sufficient replicates should be included to establish the variability of the results. Variability has been observed when similar specimens are tested in different fog chambers even though the testing conditions are nominally similar and within the ranges specified in this practice.
SCOPE
1.1 This practice covers the apparatus, procedure, and conditions required to create and maintain the salt spray (fog) test environment. Suitable apparatus which may be used is described in Appendix X1.
1.2 This practice does not prescribe the type of test specimen or exposure periods to be used for a specific product, nor the interpretation to be given to the results.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Designation:B117–07a
Standard Practice for
1
Operating Salt Spray (Fog) Apparatus
This standard is issued under the fixed designation B 117; 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 E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This practice covers the apparatus, procedure, and
G85 Practice for Modified Salt Spray (Fog) Testing
conditions required to create and maintain the salt spray (fog)
test environment. Suitable apparatus which may be used is
3. Significance and Use
described in Appendix X1.
3.1 This practice provides a controlled corrosive environ-
1.2 This practice does not prescribe the type of test speci-
ment which has been utilized to produce relative corrosion
men or exposure periods to be used for a specific product, nor
resistance information for specimens of metals and coated
the interpretation to be given to the results.
metals exposed in a given test chamber.
1.3 The values stated in SI units are to be regarded as the
3.2 Prediction of performance in natural environments has
standard. The values given in parentheses are for information
seldom been correlated with salt spray results when used as
only.
stand alone data.
1.4 This standard does not purport to address all of the
3.2.1 Correlation and extrapolation of corrosion perfor-
safety concerns, if any, associated with its use. It is the
mance based on exposure to the test environment provided by
responsibility of the user of this standard to establish appro-
this practice are not always predictable.
priate safety and health practices and determine the applica-
3.2.2 Correlation and extrapolation should be considered
bility of regulatory limitations prior to use.
only in cases where appropriate corroborating long-term atmo-
2. Referenced Documents spheric exposures have been conducted.
2
3.3 The reproducibility of results in the salt spray exposure
2.1 ASTM Standards:
is highly dependent on the type of specimens tested and the
B 368 Test Method for Copper-Accelerated Acetic Acid-
evaluation criteria selected, as well as the control of the
Salt Spray (Fog) Testing (CASS Test)
operating variables. In any testing program, sufficient repli-
D 609 Practice for Preparation of Cold-Rolled Steel Panels
cates should be included to establish the variability of the
for Testing Paint, Varnish, Conversion Coatings, and
results. Variability has been observed when similar specimens
Related Coating Products
are tested in different fog chambers even though the testing
D 1193 Specification for Reagent Water
conditions are nominally similar and within the ranges speci-
D 1654 Test Method for Evaluation of Painted or Coated
fied in this practice.
Specimens Subjected to Corrosive Environments
E70 Test Method for pH of Aqueous Solutions With the
4. Apparatus
Glass Electrode
4.1 The apparatus required for salt spray (fog) exposure
consists of a fog chamber, a salt solution reservoir, a supply of
suitably conditioned compressed air, one or more atomizing
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
nozzles, specimen supports, provision for heating the chamber,
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
and necessary means of control. The size and detailed con-
Corrosion Tests.
struction of the apparatus are optional, provided the conditions
Current edition approved Dec. 15, 2007. Published January 2008. Originally
approved in 1939. Last previous edition approved in 2007 as B 117–07.
obtained meet the requirements of this practice.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2 Drops of solution which accumulate on the ceiling or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cover of the chamber shall not be permitted to fall on the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specimens being exposed.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B117–07a
4.3 Drops of solution which fall from the specimens shall 7.1.2 The specimens shall not contact each other or any
not be returned to the solution reservoir for respraying. metallic material or any material capable of acting as a wick.
4.4 Material of construction shall be such that it will not 7.1.3 Each specimen shall be placed to permit unencum-
aff
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:B117–07 Designation:B117–07a
Standard Practice for
1
Operating Salt Spray (Fog) Apparatus
This standard is issued under the fixed designation B 117; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This practice covers the apparatus, procedure, and conditions required to create and maintain the salt spray (fog) test
environment. Suitable apparatus which may be used is described in Appendix X1.
1.2 This practice does not prescribe the type of test specimen or exposure periods to be used for a specific product, nor the
interpretation to be given to the results.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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:
B 368 Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)
D 609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related
Coating Products
D 1193 Specification for Reagent Water
D 1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
E 70 Test Method for pH of Aqueous Solutions With the Glass Electrode
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
G 85 Practice for Modified Salt Spray (Fog) Testing
3. Significance and Use
3.1 This practice provides a controlled corrosive environment which has been utilized to produce relative corrosion resistance
information for specimens of metals and coated metals exposed in a given test chamber.
3.2 Prediction of performance in natural environments has seldom been correlated with salt spray results when used as stand
alone data.
3.2.1 Correlation and extrapolation of corrosion performance based on exposure to the test environment provided by this
practice are not always predictable.
3.2.2 Correlation and extrapolation should be considered only in cases where appropriate corroborating long-term atmospheric
exposures have been conducted.
3.3 The reproducibility of results in the salt spray exposure is highly dependent on the type of specimens tested and the
evaluation criteria selected, as well as the control of the operating variables. In any testing program, sufficient replicates should
be included to establish the variability of the results. Variability has been observed when similar specimens are tested in different
fog chambers even though the testing conditions are nominally similar and within the ranges specified in this practice.
4. Apparatus
4.1 The apparatus required for salt spray (fog) exposure consists of a fog chamber, a salt solution reservoir, a supply of suitably
conditioned compressed air, one or more atomizing nozzles, specimen supports, provision for heating the chamber, and necessary
1
ThispracticeisunderthejurisdictionofASTMCommitteeG01onCorrosionofMetalsandisthedirectresponsibilityofSubcommitteeG01.05onLaboratoryCorrosion
Tests.
Current edition approved March 1,Dec. 15, 2007. Published March 2007.January 2008. Originally approved in 1939. Last previous edition approved in 20032007 as
B117–03.B 117–07.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B117–07a
means of control. The size and detailed construction of the apparatus are optional, provided the conditions obtained meet the
requirements of this practice.
4.2 Drops of solution which accumulate on the ceiling or cover of the chamber shall not be permitted to fall on the specimens
being exposed.
4.3 Drops of solution which fall from the specimens shall not be returned
...
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