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ASTM D6943-10

(Practice)

Standard Practice for Immersion Testing of Industrial Protective Coatings

Standard Practice for Immersion Testing of Industrial Protective Coatings

SIGNIFICANCE AND USE
Protective coatings are used on metallic and concrete storage and processing vessels, shipping containers, dams and rail cars to protect the substrate from corrosive attack and to protect stored materials (cargo) from contamination. This method provides a means to assess the ability of a protective coating to resist degradation by chemicals and to protect the liquid cargo from contamination by either the substrate or coating, based on visual observations. Other measures of degradation, such as changes in weight or dimensions of the coating material, or chemical changes to the cargo, may be used to assess this protective ability as mutually agreed upon between contracting parties.
This standard practice covers three approaches to conducting evaluations of a lining coating materials fitness for purpose.
Method A—Evaluation of specimens under conditions of constant temperature at atmospheric pressure, (that is, without a thermal gradient).
Method B—Evaluation of specimens under conditions which provides a temperature gradient across the sample: The temperature may increase from coated side to uncoated side (Method B1) or decrease from coated side to uncoated side (Method B2).
Method C—Evaluation of specimens under conditions of constant temperature and increased pressure, (that is, without a thermal gradient).
Exposure of materials of known performance (a control) at the same time as the test material is recommended.
SCOPE
1.1 This practice establishes procedures for the evaluation of the resistance of industrial protective coatings to immersion in chemicals.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parenthesis are for information only.
1.3 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
31-Jan-2010
ICS
25.220.99 - Other treatments and coatings
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.46 - Industrial Protective Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D6943-03 - Standard Practice for Immersion Testing of Industrial Protective Coatings
Effective Date
01-Feb-2010
Replaced By
ASTM D6943-15 - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
Effective Date
01-Jun-2015
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Feb-2010

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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: D6943 − 10
StandardPractice for
1
Immersion Testing of Industrial Protective Coatings
This standard is issued under the fixed designation D6943; 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.
1. Scope Lining Work for Power Generation Facilities
D4541 Test Method for Pull-Off Strength of Coatings Using
1.1 This practice establishes procedures for the evaluation
Portable Adhesion Testers
of the resistance of industrial protective coatings to immersion
D5139 Specification for Sample Preparation for Qualifica-
in chemicals.
tion Testing of Coatings to be Used in Nuclear Power
1.2 The values stated in SI units are to be regarded as the
Plants
standard. The values given in parenthesis are for information
D5162 Practice for Discontinuity (Holiday) Testing of Non-
only.
conductive Protective Coating on Metallic Substrates
1.3 This standard does not purport to address all of the
D6132 TestMethodforNondestructiveMeasurementofDry
safety concerns, if any, associated with its use. It is the
Film Thickness of Applied Organic Coatings Using an
responsibility of the user of this standard to establish appro-
Ultrasonic Coating Thickness Gage
priate safety and health practices and determine the applica-
D6577 Guide for Testing Industrial Protective Coatings
bility of regulatory limitations prior to use.
D6677 Test Method for Evaluating Adhesion by Knife
D7055 PracticeforPreparation(byAbrasiveBlastCleaning)
2. Referenced Documents
of Hot-Rolled Carbon Steel Panels forTesting of Coatings
2
2.1 ASTM Standards:
D7091 Practice for Nondestructive Measurement of Dry
C868 Test Method for Chemical Resistance of Protective
Film Thickness of Nonmagnetic Coatings Applied to
Linings
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
D16 TerminologyforPaint,RelatedCoatings,Materials,and
ings Applied to Non-Ferrous Metals
Applications
D7234 Test Method for Pull-OffAdhesion Strength of Coat-
D610 Practice for Evaluating Degree of Rusting on Painted
ings on Concrete Using Portable Pull-Off Adhesion Tes-
Steel Surfaces
ters
D714 Test Method for Evaluating Degree of Blistering of
G113 Terminology Relating to Natural andArtificial Weath-
Paints
ering Tests of Nonmetallic Materials
D2200 Practice for Use of Pictorial Surface Preparation
3
2.2 NACE Standard:
Standards and Guides for Painting Steel Surfaces
TM 0174-2002 Laboratory Methods for the Evaluation of
D3359 Test Methods for Measuring Adhesion by Tape Test
Protective Coatings and Lining Materials on Metallic
D3363 Test Method for Film Hardness by Pencil Test
Substrates in Immersion Service
D4138 Practices for Measurement of Dry Film Thickness of
Protective Coating Systems by Destructive, Cross- 4
2.3 SSPC/NACE Joint Standards:
Sectioning Means
SSPC-SP5/NACE 1 White Metal Blast Cleaning
D4417 Test Methods for Field Measurement of Surface
SSPC-SP10/NACE 2 Near White Blast Cleaning
Profile of Blast Cleaned Steel
SSPC-SP13/NACE 6 Surface Preparation of Concrete
D4538 Terminology Relating to Protective Coating and
SSPC Protective Coatings Glossary
5
2.4 Other Document
Coating Encyclopedia Dictionary
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
Current edition approved Feb. 1, 2010. Published March 2010. Originally
3
approved in 2003. Last previous edition approved in 2003 as D6943 – 03. DOI: Available from NACE International (NACE), 1440 South Creek Dr., Houston,
10.1520/D6943-10. TX 77084-4906, http://www.nace.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Pittsburgh, PA 15222-4656, http://www.sspc.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available from Federation of Societies for Coatings Technology (FSCT), 492
the ASTM website. Norristown Rd., Blue Bell, PA 19422-2350, http://www.coatingstech.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6943 − 10
3. Terminology mendation falls outside of the range of Test Methods D4417
thenpreparethetestpanelsinaccordancewithPracticeD7055.
3.1 The definitions given in Terminologies D16, G113 and
5.1.5 Othermetallicsubstrates,paneldimensions,orsurface
D4538 are applicable to this practice.
preparation are accept
...

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:D6943–03 Designation: D6943 – 10
Standard Practice for
1
Immersion Testing of Industrial Protective Coatings
This standard is issued under the fixed designation D6943; 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.
1. Scope
1.1 This practice establishes procedures for the evaluation of the resistance of industrial protective coatings to immersion in
chemicals.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parenthesis are for information only.
1.3 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:
C868 Test Method for Chemical Resistance of Protective Linings
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D610 Practice for Evaluating Degree of Rusting on Painted Steel Surfaces
D714 Test Method for Evaluating Degree of Blistering of Paints D1186Test Methods for Nondestructive Measurement of Dry
Film Thickness of Nonmagnetic Coatings Applied to a
Ferrous Base
D1400Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a
Nonferrous Metal Base
D2200 Practice for Use of Pictorial Surface Preparation Standards and Guides for Painting Steel Surfaces
D3359 Test Methods for Measuring Adhesion by Tape Test
D3363 Test Method for Film Hardness by Pencil Test
D4138 Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning
Means
D4417 Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel
D4538 Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities
D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
D5139 Specification for Sample Preparation for Qualification Testing of Coatings to be Used in Nuclear Power Plants
D5162 Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates
D6132 Test Method for Nondestructive Measurement of Dry Film Thickness ofApplied Organic Coatings Using an Ultrasonic
Gage
D6577 Guide for Testing Industrial Protective Coatings
D6677 Test Method for Evaluating Adhesion by Knife
D7055 Practice for Preparation (by Abrasive Blast Cleaning) of Hot-Rolled Carbon Steel Panels for Testing of Coatings
D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals
and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
D7234 Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
ASTM Manual MNL8ASTM Manual on Maintenance Coatings for Nuclear Power Plants Terminology Relating to Natural and
Artificial Weathering Tests of Nonmetallic Materials
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
Current edition approved Dec. 1, 2003. Published December 2003. DOI: 10.1520/D6943-03.
Current edition approved Feb. 1, 2010. Published March 2010. Originally approved in 2003. Last previous edition approved in 2003 as D6943 - 03. DOI:
10.1520/D6943-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM 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 ----------------------
D6943 – 10
3
2.2 NACE Standard:
TM 0174-2002 Laboratory Methods for the Evaluation of Protective Coatings and Lining Materials on Metallic Substrates in
Immersion Service
4
2.3 SSPC/NACE Joint Standards:
SSPC-SP5/NACE 1 White Metal Blast Cleaning
SSPC-SP10/NACE 2 Near White Blast Cleaning
SSPC-SP13/NACE 6 Surface Preparation of C
...

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4.1 Protective coatings are used on metallic and concrete storage and processing vessels, shipping containers, dams and rail cars to protect the substrate from corrosive attack and to protect stored materials (cargo) from contamination. This method provides a means to assess the ability of a protective coating to resist degradation by chemicals and to protect the liquid cargo from contamination by either the substrate or coating, based on visual observations. Other measures of degradation, such as changes in weight or dimensions of the coating material, or chemical changes to the cargo, may be used to assess this protective ability as mutually agreed upon between contracting parties. Simple chemical-resistance evaluations of the lining materials may be performed more conveniently by other pertinent methods as a prescreening test for this procedure in accordance with Test Methods C267 and D471.  
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SCOPE
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SCOPE
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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.  
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Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings

SIGNIFICANCE AND USE
5.1 This test procedure is used to simulate the physical and environmental stresses that a coating for exterior transportation applications (for example, automotive) is exposed to in a subtropical climate, such as southern Florida. It has been found that such a subtropical climate causes particularly severe deterioration of such coatings. The long water exposures and wet/dry cycling found in southern Florida are particularly important for this deterioration, in addition to the high dosage of solar radiation (3). This practice was developed to address the deficiencies of historical tests used for transportation coatings, especially automotive coatings (4).
Note 1: This test procedure was developed through eight years of cooperative testing between automotive and aerospace OEM’s, material suppliers, and test equipment manufacturers. See References for published papers on this research.
SCOPE
1.1 This practice specifies the operating procedures for a controlled irradiance xenon arc light and water apparatus. The procedure uses one or more lamp(s) and optical filter(s) to produce irradiance similar to sunlight in the UV and visible range. It also simulates the water absorption and stress cycles experienced by automotive exterior coatings under natural weathering conditions. This practice has also been found applicable to coatings on other transportation vehicles, such as aircraft, trucks and rail cars.  
1.2 This practice uses a xenon arc light source with specified optical filter(s). The spectral power distribution (SPD) for the lamp and special daylight filter(s) is as specified in Annex A1. The irradiance level used in this practice varies between 0.40 and 0.80 W/(m2·nm) at 340 nm. Water is sprayed on the specimens during portions of several dark steps. The application of water is such that the coatings will absorb and desorb substantial amounts of water during testing. In addition, the cycling between wet/dry and warm/cool will induce mechanical stresses into the materials. These test conditions are designed to simulate the physical and chemical stresses from environments in a subtropical climate, such as southern Florida.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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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