ASTM D8022-20 PDF

Full title and description

ASTM D8022-20 — Standard Test Method for Roll Stability of Lubricating Grease in Presence of Water (Wet Roll Stability Test). This method provides a laboratory procedure to evaluate the structural (roll) stability of lubricating greases when exposed to water, using a roll-stability test apparatus to measure change in worked penetration after rolling in the presence of water.

Abstract

This test method addresses the effect of water contamination on grease structure by subjecting a prepared grease sample to rolling in a controlled apparatus with added water and then measuring penetration (consistency) changes. It is widely used as a wet structural stability test in grease specifications and comparative evaluations, although users should be aware that an exact correlation between this laboratory result and in-service performance is not universally established.

General information

• Status: Active (in current use; referenced in grease testing laboratories and service providers).
• Publication date: January 6, 2020 (designation D8022-20).
• Publisher: ASTM International.
• ICS / categories: 75.100 (Lubricants, industrial oils and related products) / Lubricants and grease testing.
• Edition / version: D8022-20 (2020 edition).
• Number of pages: 3 pages (concise test method format).

Information compiled from ASTM publication metadata and technical summaries used by independent testing laboratories and standards catalogues.

Scope

Specifies a laboratory procedure for determining roll stability (change in worked penetration) of lubricating greases in the presence of water using a roll stability apparatus. The method defines sample preparation, test conditions and post-test penetration measurement to report initial and final worked penetration values and the change caused by rolling in wet conditions. It is intended for comparative and specification testing of greases where water contamination may be a service concern.

Key topics and requirements

• Wet roll-stability test apparatus and general test configuration (grease placed in a rolling cylinder with a weighted roll element and water introduced to simulate contamination).
• Measurement of worked penetration (consistency) before and after rolling to quantify structural breakdown or softening.
• Typical sample quantities and laboratory practice used by commercial labs (sample sizes reported by testing services, e.g., ~100–130 g, and common test durations used in practice).
• Reporting requirements: initial penetration, final penetration, and change in penetration (used for specification limits or comparative evaluation).
• Notes on units (SI units are used as standard) and safety/responsibility statements for users to observe appropriate laboratory safety and regulatory considerations.

Typical use and users

Used by lubricant and grease manufacturers, independent testing laboratories, quality control departments, specification writers and purchasers who need to evaluate grease resistance to water contamination. Common applications include industrial machinery, automotive bearings, marine and other environments where water ingress can occur. Results are used for product development, QC acceptance, and specification compliance.

Related standards

Related roll-stability and grease test methods include ASTM D1831 (roll stability of lubricating grease, dry/thermal variants), ASTM D1403 (penetration, unworked or worked), and other grease performance tests referenced in grease specifications. Users commonly apply D8022 together with these methods to build a full performance profile.

Keywords

roll stability, wet roll stability, lubricating grease, water contamination, worked penetration, grease consistency, grease testing, ASTM D8022-20.

FAQ

Q: What is this standard?

A: ASTM D8022-20 is a Standard Test Method that defines how to measure the roll stability (structural stability) of lubricating grease in the presence of water — often called the Wet Roll Stability Test.

Q: What does it cover?

A: It covers sample preparation, rolling in the presence of water, and pre- and post-test worked penetration measurements to quantify change in grease consistency caused by wet rolling. It is primarily a comparative/specification test rather than a definitive prediction of field performance.

Q: Who typically uses it?

A: Grease and lubricant manufacturers, independent test laboratories, OEMs, and procurement/specification engineers use D8022 to evaluate and specify grease resistance to water contamination.

Q: Is it current or superseded?

A: The designation D8022-20 is the 2020 edition and is listed as an active test method. Note: ASTM committee work items for related roll-stability methods have been initiated (committee activity to revise roll-stability methods has been recorded), so users should check for amendments or new revisions when planning long-term specification use.

Q: Is it part of a series?

A: It is used alongside other grease test methods (for example D1831 for roll stability under dry/heated conditions and D1403 for penetration measurement) to form a broader grease performance test battery.

Q: What are the key keywords?

A: Wet roll stability, lubricating grease, water stability, roll stability apparatus, worked penetration, grease consistency, ASTM D8022-20.