ASTM D2247-25 PDF

Full title and description

ASTM D2247-25 — Standard Practice for Testing Water Resistance of Coatings in 100% Relative Humidity. This practice describes conditions and procedures for exposing coated specimens to an atmosphere maintained at 100% relative humidity so that condensation forms on the specimens for evaluation of water resistance of coatings.

Abstract

This standard (2025 edition) provides a reproducible method for producing continuous condensation on coated test panels within a controlled humidity cabinet and defines the environmental controls, apparatus characteristics, and general test procedures used to assess coating resistance to sustained high-humidity exposure. It is intended as a conditioning/accelerated-exposure practice rather than a prescriptive specification for specimen preparation or performance acceptance.

General information

• Status: Current / Active (published and in force as of 2025).
• Publication date: January 6, 2025 (designated D2247-25).
• Publisher: ASTM International.
• ICS / categories: 87.040 (Paints and varnishes / coatings).
• Edition / version: D2247-25 (2025 edition).
• Number of pages: 7 pages.

Scope

This practice covers methods for obtaining, measuring, and controlling the environmental conditions required to expose coated specimens to 100% relative humidity with condensation on the test specimens at all times. It does not prescribe specimen preparation, coating application, film thickness, or specific pass/fail acceptance criteria — those are defined elsewhere or agreed between purchaser and supplier. The practice is commonly used as an accelerated exposure/conditioning method to reveal defects such as blistering, loss of adhesion, and corrosion initiation under sustained condensation.

Key topics and requirements

• Design and performance of humidity/condensation cabinets (temperature control, water supply, insulation, and specimen supports).
• Control and verification of 100% relative humidity and conditions that produce continuous condensation on specimens.
• General procedures for mounting and exposing coated panels (orientation, spacing, and exposure duration recommendations).
• Notes on what the practice does not cover (specimen preparation, acceptance criteria, or detailed evaluation methods).
• Cross-references to related test methods and practices used for evaluation of rusting, blistering, and adhesion.

Typical use and users

Used by paint and coating manufacturers, third‑party test laboratories, quality/assurance departments, coastal and industrial specifiers, and research groups to evaluate coating formulations and substrate/coating systems for susceptibility to blistering, loss of adhesion, or rust under sustained condensation. Also used to compare formulations, support product development, and qualify coatings for service in high‑humidity environments.

Related standards

Commonly referenced companion standards and alternatives include ASTM D610 (degree of rusting), ASTM D714 (degree of blistering), ASTM D870 (water resistance by immersion), ASTM D1735/D4585 (other humidity/condensation practices), and international equivalents such as ISO 6270 (parts addressing condensation in-cabinet exposure). Users often apply D2247 together with these methods when developing test programs.

Keywords

humidity cabinet, condensation, 100% relative humidity, water resistance, coatings, blistering, adhesion, rusting, paints and varnishes, accelerated exposure.

FAQ

Q: What is this standard?

A: ASTM D2247-25 is the 2025 edition of the ASTM practice that defines procedures for testing the water resistance of coatings by exposing specimens in an atmosphere maintained at 100% relative humidity (continuous condensation).

Q: What does it cover?

A: It covers the environmental conditions, apparatus characteristics, and procedures for producing and maintaining continuous condensation on test specimens. It does not specify specimen preparation, coating application, specific exposure durations for pass/fail decisions, or detailed evaluation criteria.

Q: Who typically uses it?

A: Coating formulators, quality-control and R&D laboratories, independent testing organizations, specifiers, and procurement teams who need to assess coating durability under sustained high-humidity/condensing conditions.

Q: Is it current or superseded?

A: As of its publication date (January 6, 2025) D2247-25 is the current edition. Users should confirm any later revisions or corrigenda from ASTM before citing in new specifications.

Q: Is it part of a series?

A: D2247 is part of ASTM Committee D01 (Paint and Related Coatings, Materials, and Applications) practices dealing with accelerated testing; it is commonly used alongside other D01/D-series test methods (for example D610, D714, D870) and international standards such as ISO 6270.

Q: What are the key keywords?

A: humidity, condensation, 100% RH, humidity cabinet, water resistance, coatings, blistering, adhesion, rust.