SAE AS5901D-2019 PDF

Full title and description

Water Spray and High Humidity Endurance Test Methods for AMS1424 and AMS1428 Aircraft Deicing/Anti‑Icing Fluids — SAE AS5901D (Revised September 4, 2019). This technical standard defines laboratory test chamber requirements and test procedures used to determine the anti‑icing endurance of AMS1424 Type I and AMS1428 Type II/III/IV aircraft deicing/anti‑icing fluids under controlled water‑spray and high‑humidity conditions.

Abstract

This standard establishes minimum environmental chamber construction, instrumentation, and step‑by‑step procedures for conducting water spray and high‑humidity endurance tests of aircraft deicing/anti‑icing fluids. Its primary purpose is to provide a repeatable laboratory method for measuring anti‑icing endurance (time to failure or performance threshold) of AMS1424 and AMS1428 fluids. The method is referenced in academic and industry studies on anti‑icing endurance and performance.

General information

• Status: Revised (AS5901D revision published September 4, 2019); later revised to AS5901E on March 25, 2025 (see FAQ).
• Publication date: September 4, 2019 (AS5901D revision).
• Publisher: SAE International.
• ICS / categories: Aerospace engineering; environmental test methods; deicing/anti‑icing fluids; test procedures.
• Edition / version: AS5901D (2019 revision).
• Number of pages: 12 pages (AS5901D).

Scope

AS5901D specifies the minimum requirements for an environmental test chamber and the procedural steps to perform water spray and high‑humidity endurance testing of AMS1424 (Type I) and AMS1428 (Types II, III, IV) aircraft deicing/anti‑icing fluids. The scope covers chamber configuration, water spray generation, humidity control, test specimen mounting, instrumentation and data recording, and criteria for determining endurance/performance under simulated environmental exposure.

Key topics and requirements

• Environmental test chamber design and minimum performance (temperature, humidity control, airflow, condensation control).
• Water spray generation and nozzle arrangement to simulate in‑service spray exposure.
• High‑humidity conditioning and control procedures to maintain specified relative humidity during tests.
• Specimen preparation and mounting to ensure repeatable exposure of treated surfaces.
• Instrumentation and data acquisition requirements (sensors for temperature, RH, spray rate, visual/photographic monitoring).
• Test sequence, timing, and pass/fail criteria for anti‑icing endurance and reporting format.
• Applicability to AMS1424 Type I and AMS1428 Type II/III/IV fluids (identifies fluids and performance context).

Typical use and users

Laboratories performing qualification and acceptance testing of aircraft deicing/anti‑icing fluids; manufacturers of deicing/anti‑icing fluids; aerospace OEMs and suppliers concerned with fluid performance; certification and regulatory organizations; and academic researchers studying anti‑icing endurance. Test houses use this method to compare formulations, verify compliance with AMS material specifications, and support procurement and qualification programs.

Related standards

Directly related material specifications and standards referenced by AS5901D include AMS1424 (Fluid, Aircraft Deicing/Anti‑Icing, Type I) and AMS1428 (Fluid, Aircraft Deicing/Anti‑Icing, Types II/III/IV). Other associated aerospace environmental and deicing practice documents (for equipment, vehicles, and procurement) are commonly used alongside AS5901D in test and qualification programs.

Keywords

AS5901D; water spray; high humidity; endurance test; anti‑icing; deicing fluid; AMS1424; AMS1428; environmental test chamber; aircraft deicing; SAE International.

FAQ

Q: What is this standard?

A: SAE AS5901D is a technical standard titled "Water Spray and High Humidity Endurance Test Methods for AMS1424 and AMS1428 Aircraft Deicing/Anti‑Icing Fluids." It defines laboratory methods and chamber requirements for measuring anti‑icing endurance of aircraft deicing/anti‑icing fluids.

Q: What does it cover?

A: It covers environmental chamber configuration, water spray and humidity control methods, specimen mounting and conditioning, instrumentation and data recording, test sequences, and pass/fail/endurance criteria specific to AMS1424 and AMS1428 fluids.

Q: Who typically uses it?

A: Test laboratories, deicing/anti‑icing fluid manufacturers, aerospace OEMs, procurement and certification bodies, and researchers investigating fluid performance and endurance.

Q: Is it current or superseded?

A: AS5901D was the revised (2019) edition; it was later revised to AS5901E, published March 25, 2025. As of March 2, 2026, AS5901E (published March 25, 2025) is the newer revision and should be consulted for the most current test method and any changes introduced since AS5901D. Specific citation and page counts: AS5901D (revised Sept 4, 2019, 12 pages) and AS5901E (revised Mar 25, 2025, 13 pages).

Q: Is it part of a series?

A: It is an SAE Aerospace (AS) test method and is functionally linked to AMS material specifications (notably AMS1424 and AMS1428). AS5901 has had prior revisions (A, B, C, D) and continued maintenance; later revisions are issued with sequential letter suffixes (for example AS5901E in 2025).

Q: What are the key keywords?

A: Anti‑icing endurance, water spray, high humidity, deicing fluid testing, AMS1424, AMS1428, environmental chamber, SAE AS5901D/E.