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Savant Labs
A World of Lubrication Understanding®

Oxidation and Corrosion Testing

Oxidation

Oxidation is the primary way a lubricant degrades over time from normal use. As oil is used in a machine over time, the oxidation process occurs, typically starting with the degradation of antioxidant additives. Several ASTM methods may be used to determine or evaluate the oxidation stability of an oil, such RPVOT D2272, D943, D4310, FTIR D7414, D4742 the TFOUT, Thin-Film Oxygen Uptake Test and D942 oxidation stability for greases.  In addition to these standard test methods, Savant Labs can combine customized Tannas Quantum® in-test sampling and FTIR or GC/MS to monitor the depletion of anti-oxidants in oil, providing powerful information on the life span of these lubricants.

Corrosion

Corrosion Inhibitors are important components of finished lubricants that protect metal components from corrosion. The best way to stop corrosion is not to allow the metal to come in contact with water, oxygen, or acid. Several ASTM methods may be used to determine a lubricant’s ability to resist corrosion, including  D665 Rust Prevention, D6594 High-Temperature Bench Corrosion Test, D1748 Exposure in a humidity cabinet, and D6557 Ball Rust, a GF-6 specification test.  The Savant Technical Team can advise which test method is best for your application and situation.

 For more information on how Savant Labs can assist with the challenges of oxidation stability and corrosion, contact us

ASTM International Method

ASTM D525     Oxidation Stability (Gasoline)
ASTM D665     Rust Prevention 4 Hours (Method A or B)
ASTM D665     Rust Prevention 24 Hours (Method A or B)
ASTM D942     Oxidation Stability (Grease) 100 Hours
ASTM D942     Mod. Oxidation Stability (Grease) > 100 Hours
ASTM D943     Oxidation Characteristics (2.0 TAN or 1000 Hours)
ASTM D943     Oxidation Characteristics (2.0 TAN or 2000 Hours)
ASTM D943     Oxidation Characteristics (2.0 TAN or 3000 Hours)
ASTM D1748   Rust Protection by Humidity Cabinet
ASTM D2112   Oxidation Stability of Inhibited Oil by Pressure Vessel at 140°C
ASTM D2272   Rotating Bomb Oxidation Test (RBOT)
ASTM D2274   Oxidation Stability (Petroleum Fuel Oil)
ASTM D2893   Oxidation Characteristics Extreme Pressure
ASTM D4310   Sludging & Corrosion Tendency (Up to 1000 Hours)
ASTM D4742   Thin Film Oxidation Uptake Test (TFOUT) Gas Engine Oils
ASTM D5483   Oxidation Stability of Greases by PDSC
ASTM D6186   Oxidation Induction Time by PDSC
ASTM D6335   Thermo-oxidation Engine Oil Simulation Test (TEOST 33C)
ASTM D6557   Ball Rust Test
ASTM D6594   High-Temperature Corrosion Bench Test at 135°C
ASTM D7097   Thermo-oxidation Engine Oil Simulation Test (TEOST MHT-4)
ASTM D7098   Thin-Film Oxygen Uptake Test (TFOUT) Catalyst B
ASTM D7414   FTIR Analysis, In-Service Fluid, Oxidation
ASTM D7462   Oxidation Stability (Biodiesel)
ASTM D7462   Oxidation Stability (Biodiesel - B100 Option)
ASTM E1858   Oxidation Induction Time by PDSC
CEC L-48         Oxidation Stability of Lubricating Oils by Artificial Aging
EN 14112          Oxidation Stability (Biodiesel & Petroleum Blends) Rancimat
EN 15751          Oxidation Stability (Bio-based FAME Only) Rancimat
SAVLAB EV-CDT     Conductive Deposit Test
SAVLAB EV-WCT    Wire Corrosion Test
SAVLAB TURBO      Thermo-oxidation Engine Oil Simulation Test (TURBO)