Infinita Lab
(888) 878-3090 Talk to an Expert Start Testing

Testing Water Resistance of Coatings as per ASTM D2247

Written by Rahul Verma | Updated: February 10, 2026

Testing Water Resistance of Coatings as per ASTM D2247

Written by Rahul Verma |  Updated: February 10, 2026
Bitumen sample being tested for penetration and viscosity in materials testing laboratory

In a closed cabinet with heated, saturated air and water vapor, test specimens are placed. The chamber is kept at a constant temperature of 38°C (100°F). Condensation forms on the specimens when the relative humidity (RH) is 100% and there is only a very slight temperature differential between the specimen and the surrounding vapor. By adjusting the test’s duration, the exposure condition is changed. Depending on the coating’s properties, water penetrates the coating at different rates.

Knowing how a coating resists water can assist determine how long it will last since water can cause coatings to degrade. Numerous things, such as a flaw in the coating itself, contamination of the substrate, or inadequate surface preparation, might lead to tests failing at 100% relative humidity. It is crucial to remember that the ASTM D2247 shouldn’t be viewed as an accelerated aging test because of how mild the test circumstances are.

Testing Water Resistance of Coatings as per ASTM D2247

In this ASTM D2247 test procedure, coated test specimens are exposed to an environment with a relative humidity of 100% in order to assess the coating’s water resistance. Condensation will be able to form on test specimens under these circumstances. ASTM D1735 and this procedure have a lot in common. Despite the fact that a different cabinet was used for this test. Additionally, a separate method is used to create the condensing fog in the same cabinet as for the ASTM G154 test.

In a closed cabinet with heated, saturated air and water vapor, test specimens are placed. The chamber is kept at a constant temperature of 38°C (100°F). Condensation forms on the specimens when the relative humidity (RH) is 100% and there is only a very slight temperature differential between the specimen and the surrounding vapor. By adjusting the test’s duration, the exposure condition is changed. Depending on the coating’s properties, water penetrates the coating at different rates.

Knowing how a coating resists water can assist determine how long it will last since water can cause coatings to degrade. Numerous things, such as a flaw in the coating itself, contamination of the substrate, or inadequate surface preparation, might lead to tests failing at 100% relative humidity. It is crucial to remember that the ASTM D2247 shouldn’t be viewed as an accelerated aging test because of how mild the test circumstances are.

ABOUT AUTHOR

Rahul Verma

Rahul Verma is a dedicated Materials Scientist and Testing Associate with strong expertise in materials characterization, thermal spray coatings, and advanced manufacturing technologies. With a solid foundation in Materials Science & Engineering and hands-on research in additive manufacturing, he specializes in bridging material behavior insights with practical engineering solutions. Currently serving as a Materials Testing Associate at Infinita Lab Inc. (USA), Rahul ensures precise material testing, quality assurance, and customer-focused solutions that help clients overcome complex materials challenges.

His role blends technical rigor with operations and project management, driving efficiency, reliability, and client satisfaction. Rahul’s journey spans academic and industrial research at IIT Patna, where he has contributed to advancements in plasma spray techniques, AI/ML-driven material design, and additive manufacturing.

He has also co-founded GreeNext Materials Group, pioneering sustainable battery regeneration technologies that have a significant impact on both industrial and societal applications. With professional experience in operations leadership, R&D, and client engagement, Rahul brings a results-oriented and analytical approach to materials engineering. He continues to advance innovation in coatings, material performance, and testing methodologies—focusing on durability, sustainability, and real-world applications.

Home / Chemical Properties of Materials / Testing Water Resistance of Coatings as per ASTM D2247

Discover more from Infinita Lab

Subscribe now to keep reading and get access to the full archive.

Continue reading

×

Talk to an Expert

    Connect Instantly

    (888) 878-3090
    Ensure Quality with the Widest Network of Accredited Labs
    • ddd
      Quick Turnaround and Hasslefree process
    • ddd
      Confidentiality Guarantee
    • ddd
      Free, No-obligation Consultation
    • ddd
      100% Customer Satisfaction

      ddd

      Start Material Testing