ASTM D6375 Test Method for Evaporation Loss of Lubricating Oils
ASTM D6375 Standard Test Method for Evaporation Loss of Lubricating Oils by Thermogravimetric Analyzer (TGA) Noack Method
1. Scope
1.1 This test method covers the procedure for determining the Noack evaporation loss of lubricating oils using a thermogravimetric analyzer test (TGA). The test method is applicable to base stocks and fully formulated lubricant oils having a Noack evaporative loss ranging from 0 to 30 mass %. This procedure requires much smaller specimens, and is faster when multiple samples are sequentially analysed, and safer than the standard Noack method using Wood's metal.
1.2 The evaporative loss determined by this test method is the same as that determined using the standard Noack test methods.
1.3 The value stated in S.I. 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 applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D5800 Test Method for Evaporation Loss of Lubricating Oils by the Noack Method
E 473 Terminology Relating to Thermal Analysis
E 1582 Practice for Calibration of Temperature Scale for Thermogravimetry
2.2 Other Documents:
DIN 51-581 Determination of Evaporation Loss of Lubricating Oils
CEC L-40-T-87 Evaporation Loss of Lubricating Oils
JPI-5S-41-93 Determination of Evaporation Loss of Engine Oils (Noack Method)
SAE 962035 The Thermogravimetric Noack Test: A Precise, Safe and Fast Method for Measuring Lubricant Volatility
IP 421 Evaporation Loss of Lubricating Oils
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 Noack reference oil - the oil provided by Noack equipment manufacturers to check proper operation of the Noack evaporation tester.
3.1.2 Noack reference time - the time (in minutes) required for the Noack reference oil to reach its known Noack evaporative loss under the conditions used in this test method.
3.1.3 TGA Noack volatility - the evaporative loss (in mass percent) of a lubricant as determined in this test method.
