ASTM B117-16

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 14-Mar-2016
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 − 16
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 3. Significance and Use
1.1 This practice covers the apparatus, procedure, and
3.1 This practice provides a controlled corrosive environ-
conditions required to create and maintain the salt spray (fog)
ment which has been utilized to produce relative corrosion
test environment. Suitable apparatus which may be used is
resistance information for specimens of metals and coated
described in Appendix X1.
metals exposed in a given test chamber.
1.2 This practice does not prescribe the type of test speci-
3.2 Prediction of performance in natural environments has
men or exposure periods to be used for a specific product, nor
seldom been correlated with salt spray results when used as
the interpretation to be given to the results.
stand alone data.
1.3 The values stated in SI units are to be regarded as the
3.2.1 Correlation and extrapolation of corrosion perfor-
standard. The values given in parentheses are for information
mance based on exposure to the test environment provided by
only.
this practice are not always predictable.
1.4 This standard does not purport to address all of the
3.2.2 Correlation and extrapolation should be considered
safety concerns, if any, associated with its use. It is the only in cases where appropriate corroborating long-term atmo-
responsibility of the user of this standard to establish appro-
spheric exposures have been conducted.
priate safety and health practices and determine the applica-
3.3 The reproducibility of results in the salt spray exposure
bility of regulatory limitations prior to use.
is highly dependent on the type of specimens tested and the
evaluation criteria selected, as well as the control of the
2. Referenced Documents
operating variables. In any testing program, sufficient repli-
2
2.1 ASTM Standards:
cates should be included to establish the variability of the
B368 Test Method for Copper-Accelerated Acetic Acid-Salt
results. Variability has been observed when similar specimens
Spray (Fog) Testing (CASS Test)
are tested in different fog chambers even though the testing
D609 Practice for Preparation of Cold-Rolled Steel Panels
conditions are nominally similar and within the ranges speci-
for Testing Paint, Varnish, Conversion Coatings, and
fied in this practice.
Related Coating Products
D1193 Specification for Reagent Water
4. Apparatus
D1654 Test Method for Evaluation of Painted or Coated
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-
G85 Practice for Modified Salt Spray (Fog) Testing struction of the apparatus are optional, provided the conditions
obtained meet the requirements of this practice.
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion 4.2 Drops of solution which accumulate on the ceiling or
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
cover of the chamber shall not be permitted to fall on the
Corrosion Tests.
specimens being exposed.
Current edition approved March 15, 2016. Published April 2016. Originally
approved in 1939. Last previous edition approved in 2011 as B117 – 11. DOI:
4.3 Drops of solution which fall from the specimens shall
10.1520/B0117-16.
2 not be returned to the solution reservoir for respraying.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.4 Material of construction shall be such that it will not
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. affect the corrosiveness of the fog.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B117 − 16
4.5 AllwaterusedforthispracticeshallconformtoTypeIV and preferably parallel to the principal direction of flow of fog
...

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 − 11 B117 − 16
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*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:
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
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.
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 Oct. 1, 2011March 15, 2016. Published November 2011April 2016. Originally approved in 1939. Last previous edition approved in 20092011
as B117B117 – 11.–09. DOI: 10.1520/B0117-11.10.1520/B0117-16.
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’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 ----------------------
B117 − 16
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
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 cham
...