MaTestLab > Test Standards > ASTM D6943 Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
Last updated 13th March 2025
ASTM D6943 Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
ASTM D6943 outlines methods for assessing the durability of industrial protective coatings when exposed to chemical immersion. Linings, a specific type of coating, are designed to shield substrates from corrosion caused by continuous or intermittent fluid contact. Protective coatings are applied to metallic and concrete storage and processing vessels, shipping containers, dams, and rail cars. They shield the substrate from corrosive damage and safeguard stored materials against contamination.
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ASTM D6943 Introduction
Protective coatings safeguard metallic and concrete storage and processing vessels, shipping containers, dams, and rail cars from corrosive damage while preventing contamination of stored materials. This method offers a way to evaluate a protective coating’s resistance to chemical deterioration and its effectiveness in shielding liquid cargo from potential contamination by either the substrate or the coating, relying on visual assessments.
ASTM D6943 Test Method
Method A
Specimens are assessed under conditions of consistent temperature and standard atmospheric pressure.
Method B
Specimens are evaluated under conditions that create a temperature variation across the sample.
Method C
Specimens are assessed under conditions where the temperature remains constant while the pressure is elevated.
D6943 Equipment and Sample Preparation
Specimen Detail
ASTM D6943 outlines the steps for assessing how well industrial protective coatings withstand immersion in various chemicals.
Specimen Size
The test requires carbon steel panels with dimensions of at least 50 by 100 mm (2 by 4 inches) and a minimum thickness of 3 mm (1/8 inch).
D6943 Test Result and Interpretation
In conclusion, D6943 offers a reliable means of evaluating the capacity of protective coatings to withstand chemical degradation and safeguard liquid cargo from contamination by either the substrate or the coating, utilizing visual observations as the basis for assessment.
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ASTM D6943 Testing
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Tests Related to ASTM D6943
ASTM D6943 is related to tests, including ASTM D16 for coatings and paints, ASTM D471 for rubber property testing, and ASTM D523 testing for specular gloss.
Use of D6943 in Various Industries
It is applied in a marina oil and gas wastewater treatment industrial chemical processing in ascertaining the protective coats and lining resistance to extreme or harsh liquid environments which prevent them for extended contact exposures to adverse environments.
Materials Commonly Tested with D6943
It is used in testing coatings such as epoxy, polyurethane and vinyl ester, which are used for linings of tanks, pipelines and industrial containers, for corrosion and chemical stability. It applies to verifying performance in a water storage tank and also in chemical reactors.
Common Challenges and Troubleshooting in D6943 Testing
Testing is susceptible to inconsistencies in immersion conditions, non-uniform coating application, and poor surface preparation. Troubleshooting involves rigorous cleaning of the surface, proper application of the coating, and adherence to immersion parameters. Standardized geometries of samples help reduce the inconsistencies.
Safety and Best Practices in D6943 Testing
Safety precautions during testing of hazardous chemicals include personal protective equipment should be used, proper ventilation, preparation and maintenance of immersion mediums, corrosion-resistant fixtures, and monitoring parameters like pH and temperature for the simulation to be reliable.
Importance of D6943
The standard is used to predict the long-term performance and reliability of protective coatings and linings in immersion environments. The manufacturers can identify suitable materials while ensuring regulatory compliance by adopting quality control and product certification.
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How many samples are required for astm d6943?
The required number of samples or specimens should comply with the procedure given in the astm d6943 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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How many days will it take to complete the astm d6943 test?
The turnaround time for astm d6943 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d6943 tested?
You can share your astm d6943 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d6943 test to various testing techniques.
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