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ASTM B995-15a(2021)

(Test Method)

Standard Test Method for Chloride Resistance Test for Chromium Electroplated Parts (Russian Mud Test)

Standard Test Method for Chloride Resistance Test for Chromium Electroplated Parts (Russian Mud Test)

SIGNIFICANCE AND USE
3.1 This test replicates in the laboratory the corrosive actions of a film containing hygroscopic chlorides and solid material (mud) on electroplated chromium. The test’s reactive media, the test slurry, was developed to simulate the film found on electroplated chromium deposits during a winter in Russia, thus the common name for the test, Russian Mud Test.  
3.2 This test is used for specification acceptance, simulated service evaluation, manufacturing control, and research and development. It was developed specifically for use on components with electrodeposited chromium coatings exposed to hygroscopic chlorides. Test and production specimens may be used. Use of a standardized test could help in developing improved quality of chromium electrodeposited components and lead to the development of improved electroplated chromium systems.  
3.3 This test simulates the amount of electrodeposited decorative and functional chromium deposit lost when exposed to the combination of “mud/solid material” and hygroscopic chlorides, most commonly calcium chloride. The metric is the loss of only the chromium and adjacent nickel layer. Other tests used with nickel/chromium electroplated components, such as CASS (Test Method B368), simulate the resistance of the part to basis metal corrosion involving all of the component’s deposits and substrate.
SCOPE
1.1 This standard details a laboratory method to accelerate the effects of exposure to hygroscopic corrosive chloride compounds on electroplated chromium components. It is applicable to any substrate and coating system that utilizes electroplated chromium as the final metallic coating.  
1.2 Field experience has shown that hygroscopic chlorides are significantly more aggressive than sodium chloride toward chromium electroplated deposits. The most common of which is calcium chloride.  
1.3 The standard does not specify exposure periods to be used for a specific product nor the interpretation to be given to the results. The suitability of this test and correlation of results with service experience should be determined before it is specified for coating systems.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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
Published
Publication Date
30-Sep-2021
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.10 - Test Methods
Current Stage
Ref Project

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ASTM B995-15a(2021) - Standard Test Method for Chloride Resistance Test for Chromium Electroplated Parts (Russian Mud Test)ASTM B995-15a(2021) - Standard Test Method for Chloride Resistance Test for Chromium Electroplated Parts (Russian Mud Test)
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ASTM B995-15a(2021) - Standard Test Method for Chloride Resistance Test for Chromium Electroplated Parts (Russian Mud Test)
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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.
Designation: B995 − 15a (Reapproved 2021)
Standard Test Method for
Chloride Resistance Test for Chromium Electroplated Parts
1
(Russian Mud Test)
This standard is issued under the fixed designation B995; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This standard details a laboratory method to accelerate
B117Practice for Operating Salt Spray (Fog) Apparatus
the effects of exposure to hygroscopic corrosive chloride
B368Test Method for Copper-AcceleratedAceticAcid-Salt
compounds on electroplated chromium components. It is
Spray (Fog) Testing (CASS Test)
applicable to any substrate and coating system that utilizes
D1193Specification for Reagent Water
electroplated chromium as the final metallic coating.
3. Significance and Use
1.2 Field experience has shown that hygroscopic chlorides
are significantly more aggressive than sodium chloride toward
3.1 This test replicates in the laboratory the corrosive
chromium electroplated deposits. The most common of which
actions of a film containing hygroscopic chlorides and solid
is calcium chloride. material (mud) on electroplated chromium. The test’s reactive
media,thetestslurry,wasdevelopedtosimulatethefilmfound
1.3 The standard does not specify exposure periods to be
on electroplated chromium deposits during a winter in Russia,
used for a specific product nor the interpretation to be given to
thus the common name for the test, Russian Mud Test.
the results.The suitability of this test and correlation of results
3.2 This test is used for specification acceptance, simulated
with service experience should be determined before it is
service evaluation, manufacturing control, and research and
specified for coating systems.
development. It was developed specifically for use on compo-
1.4 The values stated in SI units are to be regarded as
nents with electrodeposited chromium coatings exposed to
standard. No other units of measurement are included in this
hygroscopic chlorides. Test and production specimens may be
standard.
used. Use of a standardized test could help in developing
improved quality of chromium electrodeposited components
1.5 This standard does not purport to address all of the
and lead to the development of improved electroplated chro-
safety concerns, if any, associated with its use. It is the
mium systems.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 3.3 This test simulates the amount of electrodeposited
decorativeandfunctionalchromiumdepositlostwhenexposed
mine the applicability of regulatory limitations prior to use.
to the combination of “mud/solid material” and hygroscopic
1.6 This international standard was developed in accor-
chlorides, most commonly calcium chloride. The metric is the
dance with internationally recognized principles on standard-
lossofonlythechromiumandadjacentnickellayer.Othertests
ization established in the Decision on Principles for the
used with nickel/chromium electroplated components, such as
Development of International Standards, Guides and Recom-
CASS (Test Method B368), simulate the resistance of the part
mendations issued by the World Trade Organization Technical
to basis metal corrosion involving all of the component’s
Barriers to Trade (TBT) Committee.
deposits and substrate.
4. Apparatus
4.1 The apparatus required for this test consists of an
environment chamber capable of controlling both temperature
andhumiditywithinthespecifiedrange(see7.4).Thechamber
1
ThistestmethodisunderthejurisdictionofASTMCommitteeB08onMetallic
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 on
2
Test Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2021. Published November 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approvedinMay2015.Lastpreviouseditionapprovedin2015asB995–15a.DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0995-15AR21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B995 − 15a (2021)
must be large enough to hold the test specimens without 6.2.3 The formulation developed to obtain the required pH
touching one a
...

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1.5 Warning—Cadmium is toxic and must not be used in a coating for articles that can come into contact with food or beverages, or for dental or other equipment that can be inserted into the mouth. Consult appropriate agencies for regulations in this connection.  
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SCOPE
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