ASTM B117-18

Standard Practice for Operating Salt Spray (Fog) Apparatus

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.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Jul-2018
• ICS: 77.060 - Corrosion of metals
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.05 - Laboratory Corrosion Tests

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: B117 − 18
Standard Practice for
1
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 U.S. Department of Defense.
1. Scope D1654 Test Method for Evaluation of Painted or Coated
Specimens Subjected to Corrosive Environments
1.1 This practice covers the apparatus, procedure, and
E70 Test Method for pH of Aqueous Solutions With the
conditions required to create and maintain the salt spray (fog)
Glass Electrode
test environment. Suitable apparatus which may be used is
E691 Practice for Conducting an Interlaboratory Study to
described in Appendix X1.
Determine the Precision of a Test Method
1.2 This practice does not prescribe the type of test speci-
G85 Practice for Modified Salt Spray (Fog) Testing
men or exposure periods to be used for a specific product, nor
the interpretation to be given to the results.
3. Significance and Use
1.3 The values stated in SI units are to be regarded as the
3.1 This practice provides a controlled corrosive environ-
standard. The values given in parentheses are for information
ment which has been utilized to produce relative corrosion
only.
resistance information for specimens of metals and coated
1.4 This standard does not purport to address all of the
metals exposed in a given test chamber.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.2 Prediction of performance in natural environments has
priate safety, health, and environmental practices and deter- seldom been correlated with salt spray results when used as
mine the applicability of regulatory limitations prior to use. stand alone data.
1.5 This international standard was developed in accor-
3.2.1 Correlation and extrapolation of corrosion perfor-
dance with internationally recognized principles on standard-
mance based on exposure to the test environment provided by
ization established in the Decision on Principles for the
this practice are not always predictable.
Development of International Standards, Guides and Recom-
3.2.2 Correlation and extrapolation should be considered
mendations issued by the World Trade Organization Technical
only in cases where appropriate corroborating long-term atmo-
Barriers to Trade (TBT) Committee.
spheric exposures have been conducted.
2. Referenced Documents 3.3 The reproducibility of results in the salt spray exposure
2
is highly dependent on the type of specimens tested and the
2.1 ASTM Standards:
evaluation criteria selected, as well as the control of the
B368 Test Method for Copper-Accelerated Acetic Acid-Salt
operating variables. In any testing program, sufficient repli-
Spray (Fog) Testing (CASS Test)
cates should be included to establish the variability of the
D609 Practice for Preparation of Cold-Rolled Steel Panels
results. Variability has been observed when similar specimens
for Testing Paint, Varnish, Conversion Coatings, and
are tested in different fog chambers even though the testing
Related Coating Products
conditions are nominally similar and within the ranges speci-
D1193 Specification for Reagent Water
fied in this practice.
4. Apparatus
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
4.1 The apparatus required for salt spray (fog) exposure
Corrosion Tests.
consists of a fog chamber, a salt solution reservoir, a supply of
Current edition approved Aug. 1, 2018. Published October 2018. Originally
suitably conditioned compressed air, one or more atomizing
approved in 1939. Last previous edition approved in 2016 as B117 – 16. DOI:
10.1520/B0117-18.
nozzles, specimen supports, provision for heating the chamber,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and necessary means of control. The size and detailed con-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
struction of the apparatus are optional, provided the conditions
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. obtained meet the requirements of this practice.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B117 − 18
4.2 Drops of solution which accumulate on the ceiling or 7. Position of Specimens During Exposure
cover of the chamber shall n
...

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: B117 − 16 B117 − 18
Standard Practice for
1
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 U.S. 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
B368 Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)
D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating
Products
D1193 Specification for Reagent Water
D1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
E70 Test Method for pH of Aqueous Solutions With the Glass Electrode
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
G85 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
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory Corrosion
Tests.
Current edition approved March 15, 2016Aug. 1, 2018. Published April 2016October 2018. Originally approved in 1939. Last previous edition approved in 20112016 as
B117 – 11.B117 – 16. DOI: 10.1520/B0117-16.10.1520/B0117-18.
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’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 − 18
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,
...