ASTM D6079 Standard Test Method for Evaluating Lubricity of Diesel Fuels by the High-Frequency Reciprocating Rig (HFRR)
1. Scope
1.1 This test method covers the evaluatesion of the lubricity of diesel fuels using a high-frequency reciprocating rig (HFRR).
1.2 This test method is applicable to middle distillate fuels, such as Grades Low Sulfur No. 1 D, Low Sulfur No. 2 D, No. 1 D, and No. 2 D diesel fuels, in accordance with Specification D975; and other similar petroleum-based fuels which can be used in diesel engines
NOTE 1 - It is not known that this test method will predict the performance of all additive/fuel combinations. Additional work is underway to further establish this correlation and future revisions of this test method may be necessary once this work is complete.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicable regulatory limitations prior to use. Specific hazard statements are given in s Section 7.
2. Referenced Documents
2.1 ASTM Standards:
D75 Specification for Acetone Diesel Fuel Oils
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D5290 Test Method for Measurement of Oil Consumption, Piston Deposits, and Wear in a Heavy-Duty High-Speed Diesel Engine-NTC-400 Procedure
D6078 Test Method for Evaluating Lubricity of Diesel Fuels by the Scuffing Load Ball-On-Cylinder Lubricity Evaluator (SLBOCLE)
E 18 Test Method for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
E 92 Test Method for Vickers Hardness of Metallic Materials
2.2 American Iron and Steel Institute Standard:
AISI E-52100 Chromium Alloy Steel
2.3 American National Standards Institute Standard:
ANSI B3.12 Metal Balls
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 boundary lubrication, n - a condition in which the friction and wear between two surfaces in relative motion are determined by the properties of the surfaces and the properties of the contacting fluid, other than bulk viscosity.
3.1.1.1 Discussion - Metal to metal contact occurs and the chemistry of system is involved. Physically adsorbed or chemically reacted soft films (usually very thin) support contact loads. As a result, some wear is inevitable.
3.1.2 lubricity, n - a qualitative term describing the ability of a fluid to affect friction between, and wear to, surfaces in relative motion under load.
3.1.2.1 Discussion - In this test method, the lubricity of a fluid is evaluated by the wear scar, in millimetres, produced on an oscillating ball from contact with stationary disc immersed in the fluid operating under defined and controlled conditions.
