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ASTM D6943-15(2019)

(Practice)

Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings

Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings

SIGNIFICANCE AND USE
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.  
4.2 This practice covers three approaches to conducting evaluations of a lining coating material’s fitness for purpose.  
4.2.1 Method A—Evaluation of specimens under conditions of constant temperature at atmospheric pressure (that is, without a thermal gradient).  
4.2.2 Method B—Evaluation of specimens under conditions which provide a temperature gradient across the sample.  
4.2.3 Method C—Evaluation of specimens under conditions of constant temperature and increased pressure (that is, without a thermal gradient).
SCOPE
1.1 This practice establishes procedures for the evaluation of the resistance of industrial protective coatings to immersion in chemicals.  
1.2 Linings are a particular type of coating intended for protection of substrates from corrosion as a result of continuous or intermittent fluid immersion.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parenthesis 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
Published
Publication Date
30-Sep-2019
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 D6943-15 - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
Effective Date
01-Oct-2019
Refers
ASTM D16-14 - Standard Terminology for Paint, Related Coatings, Materials, and Applications
Effective Date
01-Dec-2014
Refers
ASTM D610-08(2019) - Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces
Effective Date
01-Jan-2019
Refers
ASTM D7055-14 - Standard Practice for Preparation (by Abrasive Blast Cleaning) of Hot-Rolled Carbon Steel Panels for Testing of Coatings
Effective Date
01-Dec-2014
Refers
ASTM D7055-19 - Standard Practice for Preparation (by Abrasive Blast Cleaning) of Hot-Rolled Carbon Steel Panels for Testing of Coatings
Effective Date
01-Jun-2019
Refers
ASTM D5139-19 - Standard Specification for Sample Preparation for Qualification Testing of Coatings to be Used in Nuclear Power Plants
Effective Date
01-Jun-2019
Refers
ASTM D16-16 - Standard Terminology for Paint, Related Coatings, Materials, and Applications
Effective Date
01-Jul-2016
Refers
ASTM D6577-15 - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Dec-2015
Refers
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Oct-2019
Refers
ASTM D4417-19 - Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel
Effective Date
01-Dec-2019

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ASTM D6943-15(2019) - Standard Practice for Immersion Testing of Industrial Protective Coatings and LiningsASTM D6943-15(2019) - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
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ASTM D6943-15(2019) - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
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Standards Content (Sample)

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: D6943 − 15 (Reapproved 2019)
Standard Practice for
Immersion Testing of Industrial Protective Coatings and
1
Linings
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 D714 Test Method for Evaluating Degree of Blistering of
Paints
1.1 This practice establishes procedures for the evaluation
D785 Test Method for Rockwell Hardness of Plastics and
of the resistance of industrial protective coatings to immersion
Electrical Insulating Materials
in chemicals.
D1474 Test Methods for Indentation Hardness of Organic
1.2 Linings are a particular type of coating intended for
Coatings
protection of substrates from corrosion as a result of continu-
D1734 Practice for Making Cementitious Panels for Testing
ous or intermittent fluid immersion.
Coatings
1.3 The values stated in SI units are to be regarded as the
D2200 Practice for Use of Pictorial Surface Preparation
standard. The values given in parenthesis are for information
Standards and Guides for Painting Steel Surfaces
only.
D2240 Test Method for Rubber Property—Durometer Hard-
1.4 This standard does not purport to address all of the
ness
safety concerns, if any, associated with its use. It is the
D2583 Test Method for Indentation Hardness of Rigid Plas-
responsibility of the user of this standard to establish appro-
tics by Means of a Barcol Impressor
priate safety, health, and environmental practices and deter-
D3359 Test Methods for Rating Adhesion by Tape Test
mine the applicability of regulatory limitations prior to use.
D3363 Test Method for Film Hardness by Pencil Test
1.5 This international standard was developed in accor-
D4138 Practices for Measurement of Dry Film Thickness of
dance with internationally recognized principles on standard-
Protective Coating Systems by Destructive, Cross-
ization established in the Decision on Principles for the
Sectioning Means
Development of International Standards, Guides and Recom-
D4417 Test Methods for Field Measurement of Surface
mendations issued by the World Trade Organization Technical
Profile of Blast Cleaned Steel
Barriers to Trade (TBT) Committee.
D4538 Terminology Relating to Protective Coating and
2. Referenced Documents
Lining Work for Power Generation Facilities
2
D4541 Test Method for Pull-Off Strength of Coatings Using
2.1 ASTM Standards:
Portable Adhesion Testers
C267 Test Methods for Chemical Resistance of Mortars,
D5139 Specification for Sample Preparation for Qualifica-
Grouts,andMonolithicSurfacingsandPolymerConcretes
D16 TerminologyforPaint,RelatedCoatings,Materials,and tion Testing of Coatings to be Used in Nuclear Power
Applications Plants
D471 Test Method for Rubber Property—Effect of Liquids D5162 Practice for Discontinuity (Holiday) Testing of Non-
D523 Test Method for Specular Gloss conductive Protective Coating on Metallic Substrates
D610 Practice for Evaluating Degree of Rusting on Painted
D6132 TestMethodforNondestructiveMeasurementofDry
Steel Surfaces
Film Thickness of Applied Organic Coatings Using an
Ultrasonic Coating Thickness Gage
D6577 Guide for Testing Industrial Protective Coatings
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 D6677 Test Method for Evaluating Adhesion by Knife
Subcommittee D01.46 on Industrial Protective Coatings.
D7055 PracticeforPreparation(byAbrasiveBlastCleaning)
Current edition approved Oct. 1, 2019. Published October 2019. Originally
of Hot-Rolled Carbon Steel Panels forTesting of Coatings
approved in 2003. Last previous edition approved in 2015 as D6943 – 15. DOI:
10.1520/D6943-15R19. D7091 Practice for Nondestructive Measurement of Dry
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Film Thickness of Nonmagnetic Coatings Applied to
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
Standards volume information, refer to the standard’s Document Summary page on
theASTM website. ings Applied to Non-Ferrous Metals
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6943 − 15 (2019)
D7234 Test Method for Pull-OffAdhesion Strength of Coat- 5.1.1 Usecarbonsteelpanelswithaminimumtestsizeof50
1
ings
...

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SCOPE
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SCOPE
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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).
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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.  
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SIGNIFICANCE AND USE
5.1 Old coatings, such as paint or related coatings, may have to be removed from a surface before successful recoating can occur. This practice can be used to test the coatings removal efficiency of products designed for such use.
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1.4 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.

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