ASTM D6335-18

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6335 − 18
Standard Test Method for
Determination of High Temperature Deposits by Thermo-
1
Oxidation Engine Oil Simulation Test
This standard is issued under the fixed designation D6335; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.1.1 ceramic isolator, n—the fitting that compresses the
O-ring into the depositor rod casing and isolates the depositor
1.1 This test method covers the procedure to determine the
rod casing from the voltage applied to the depositor rod.
amount of deposits formed by automotive engine oils utilizing
4
2 3
2.1.2 depositor rod , n—a patented, specially made,
thethermo-oxidationengineoilsimulationtest(TEOST ). An
numbered, and registered steel rod (used once for each test) on
17) has determined it to be
interlaboratory study (see Section
whichthedepositsarecollected.Itisresistivelyheatedthrough
applicable over the range from 10mg to 65mg total deposits.
a series of twelve temperature cycles during the test to
NOTE 1—Operational experience with the test method has shown the
temperatures established and controlled by a thermocouple
test method to be applicable to engine oils having deposits over the range
inserted to a pre-determined depth in the hollow rod.
from 2mg to 180mg total deposits.
2.1.3 depositor rod casing, n—the sleeve that surrounds the
1.2 The values stated in SI units are to be regarded as
depositor rod and allows the flow of the test oil up and around
standard.
the outside of the rod at a flow rate such that every volume
1.2.1 Milligrams(mg),grams(g),milliliters(mL),andliters
element of the test oil is exposed to the same heating cycle.
are the units provided, because they are an industry accepted
2.1.4 drain tube, n—the tube connecting the upper outlet of
standard.
the depositor rod casing to the reaction chamber.
1.2.2 Exception—Pounds per square inch gauge (psig) is
provided for information only in 6.2.
2.1.5 end cap, n—the fitting to tighten the ceramic isolators
onto the O-rings at both ends of the depositor rod casing.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 2.1.6 filter deposits, n—the mass in milligrams of the
responsibility of the user of this standard to establish appro-
deposits collected after test on a special multi-layer filter
priate safety, health, and environmental practices and deter- cartridge used once for each test.
mine the applicability of regulatory limitations prior to use.
2.1.7 pump, n—the gear pump that is used to control the
1.4 This international standard was developed in accor-
flow rate of the test oil through the depositor rod casing.
dance with internationally recognized principles on standard-
2.1.8 pump inlet tube, n—the tube connecting the reactor
ization established in the Decision on Principles for the
chamber to the pump.
Development of International Standards, Guides and Recom-
2.1.9 pump outlet tube, n—the tube connecting the pump to
mendations issued by the World Trade Organization Technical
the depositor rod casing.
Barriers to Trade (TBT) Committee.
2.1.10 reactor chamber, n—the heated reservoir that con-
2. Terminology tainsthebulk(approximately100mL)ofthe116mLoftestoil
sample circulated past the deposit rod during the test. The
2.1 Definitions of Terms Specific to This Standard:
reactor is equipped with a magnetic stir-bar to continuously
mix the chamber contents.
1 2.1.10.1 Discussion—In the reaction chamber, moist air and
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of nitrous oxide are each bubbled at a controlled rate of
Subcommittee D02.09.0G on Oxidation Testing of Engine Oils.
3.5mL⁄min through a channel opening at the bottom of the
CurrenteditionapprovedJune1,2018.PublishedJuly2018.Originallyapproved
in 1998. Last previous edition approved in 2016 as D6335 – 16. DOI: 10.1520/
D6335-18.
2 4
TEOST is a trademark of the Tannas Co. (Reg. 2001396), Tannas Company, The sole source of supply of the apparatus known to the committee at this time
4800 James Savage Rd., Midland, MI 48642. is Tannas Co., 4800 James Savage Rd., Midland, MI 48642. If you are aware of
3
The Development of Thermo-Oxidation Engine Oil Simulation Test (TEOST), alternative suppliers, please provide this information to ASTM International
Society of Automotive Engineers (SAE No. 932837), 400 Commonwealth Dr., Headquarters.Your comments will receive careful consideration at a meeting of the
1
Warrendale, PA 15096-0001. responsible technical committee,
...