ASTM E2009-23 PDF

Overview

ASTM E2009-23: Standard Test Methods for Oxidation Onset Temperature of Hydrocarbons by Differential Scanning Calorimetry establishes standardized methods for determining the oxidative properties of hydrocarbons. Using tools such as Differential Scanning Calorimetry (DSC) or Pressure Differential Scanning Calorimetry (PDSC), these methods measure the Oxidation Onset Temperature (OOT), which serves as a relative indicator of a material’s oxidative stability under defined heating conditions. This standard is widely used in industries handling hydrocarbons, including edible oils, lubricants, greases, and polyolefins, to evaluate material performance and quality.

Key Topics

• Oxidation Onset Temperature (OOT): A comparative measure of the oxidative stability of hydrocarbons. A higher OOT indicates greater stability under the test conditions.
• Test Environments:
  • Method A: Uses DSC at ambient pressure in an oxygen atmosphere.
  • Method B: Uses PDSC at elevated pressures (e.g., 3.5 MPa of oxygen).
  • Method C: Uses DSC at ambient pressure in air.
• Relevance of OOT: The OOT values are not absolute measures (in contrast to Oxidation Induction Time, OIT), but serve effectively for comparative and quality control purposes.
• Effect of Antioxidants: The method can be used to assess the presence or effectiveness of antioxidants in tested materials.
• Calibration and Accuracy: Regular calibration and proper setup of DSC/PDSC equipment are critical for precise measurements. The sensor must be in close thermal contact with the specimen, and calibration materials such as indium and tin are employed.
• Safety Considerations: Handling of oxygen and other reactive gases requires adherence to safety practices to minimize hazards.

Applications

ASTM E2009-23 test methods have several practical applications across industries working with hydrocarbons:

• Quality Assurance: Routine determination of OOT values assists manufacturers in monitoring the oxidative stability of products such as edible oils, lubricants, greases, and polymer-based materials like polyolefins.
• Research and Development: Comparative OOT measurements are valuable during product development, especially for materials where oxidation resistance is a key property.
• Antioxidant Evaluation: By measuring OOT, the impact of antioxidant additives can be determined, guiding formulation and development of more stable products.
• Process Control: Monitoring changes in OOT over time or after certain treatments can help detect issues in manufacturing or storage conditions.
• Comparative Analysis: Enables the benchmarking of new materials or formulations against established standards, supporting informed material selection and assurance.

Related Standards

When implementing or referencing ASTM E2009-23, the following related ASTM standards offer complementary methods and terminology:

• ASTM D3350: Specification for Polyethylene Plastics Pipe and Fittings Materials
• ASTM D3895: Test Method for Oxidative-Induction Time of Polyolefins by DSC
• ASTM D4565: Test Methods for Physical and Environmental Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable
• ASTM D5483: Test Method for Oxidation Induction Time of Lubricating Greases by PDSC
• ASTM E473: Terminology Relating to Thermal Analysis and Rheology
• ASTM E691: Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E967: Test Method for Temperature Calibration of DSC and Differential Thermal Analyzers
• ASTM E1858: Test Methods for Determining Oxidation Induction Time of Hydrocarbons by DSC
• ASTM E3142: Test Method for Thermal Lag of Thermal Analysis Apparatus

These referenced documents reinforce standardization, comparability, and precision in oxidation stability and hydrocarbon testing.

Keywords: ASTM E2009-23, oxidation onset temperature, differential scanning calorimetry, hydrocarbons, oxidative stability, pressure differential scanning calorimetry, quality control, lubricant testing, edible oil stability, polymer oxidative stability.