DOD-PRF-85734A
SAE AMS-T-9046 -
Titanium and Titanium Alloy, Sheet, Strip, and Plate (DoD
Adopted)
AEROSPACE RECOMMENDED PRACTICE (ARP)
SAE ARP 5088
-
Test Method for the Determination of Total Acidity in Polyol
Ester and Diester Gas Turbine Engine Lubricants by Automatic
Potentiometric Titration
(Copies of SAE documents are available from the Society of Automotive Engineers, SAE
World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or through their
website at https://www.sae.org.)
2.4 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 Qualification. The lubricating oil furnished under this specification shall be products
that are authorized by the qualifying activity for listing on the applicable qualified products list
before contract award (see 4.2 and 6.3).
3.2 Materials. The composition of the lubricating oil is not limited; however, materials
containing barium, organic compounds of titanium, and known or suspected human carcinogens
(as specified by the Occupational Safety and Health Standards Hazard Communications, 29
CFR 1910.1200) are prohibited. Recycled basestocks are permitted; however, each batch must
be fully tested in accordance with the qualification requirements of this specification. If a
tricresyl phosphate (TCP) additive is used, it shall not contain more than one (1) percent of the
ortho-isomer of tricresyl phosphate.
3.2.1 Acid assay. The acid components, in mole-percent, of the finished oil submitted as
the qualification test sample shall be determined in accordance with FED-STD-791, method
3500, "Monobasic Acid Components of Synthetic Ester Lubricants by Gas Chromatography."
The manufacturer shall then select a range of 10 mole-percent for each acid component to
bracket the values measured on the qualification sample by the qualifying laboratory. The major
acid components (10 mole-percent or greater) of the oil shall fall within the stated range for each
acid. The minor acid components shall not exceed 10 mole-percent. The manufacturer may use
alternate methods to determine the acid components as described in Table I, footnote 1.
3.3 Chemical and physical requirements. The lubricating oil shall conform to table I.
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