ASTM-D7590 2009

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D7590-09 Standard Guide for Measurement of Remaining Primary Antioxidant Content In In-Service Industrial Lubricating Oils by Linear Sweep Voltammetry

Published By	Publication Date	Number of Pages
ASTM	2009	14

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Category: ASTM

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Description

1.1 This guide covers the voltammetric analysis for qualitative measurements of primary antioxidants in new or in-service type industrial lubricants detectable in concentrations as low as 0.0075 mass percent up to concentrations found in new oils by measuring the amount of current flow at a specified voltage in the produced voltammogram.

1.2 This guide can be used as a resource for a condition monitoring program to track the oxidative health of a range of industrial lubricants which contain primary antioxidants. In order to avoid excessive degradation of the base-oil, these primary antioxidants play a major role to protect the lubricants against thermal-oxidative degradation. This guide can help users with interpretation and troubleshooting results obtained using linear sweep voltammetry (LSV).

1.3 When used as part of oil condition monitoring practices, it is important to apply trend analysis to monitor the antioxidant depletion rate relative to a baseline sample rather than use voltammetry for an absolute measurement of the antioxidant concentration. The trending pattern provides a proactive means to identify the level of oil degradation or abnormal changes in the condition of the in-service lubricant.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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.

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PDF Pages	PDF Title
1	Scope Referenced Documents
2	Oil Condition Monitoring Programs Summary of Linear Sweep Voltammetric (LSV) Test Method Significance and Use
3	FIG. 1
4	FIG. 2 FIG. 3
5	Voltammetric Test Apparatus FIG. 4 FIG. 5
6	Sampling FIG. 5 FIG. 5
7	Test Solutions – Reagents and Selection Procedure FIG. 6
9	Troubleshooting
10	FIG. 7 FIG. 8
11	Calculation FIG. 9
12	FIG. 10 FIG. 11
13	Report Voltammetric Data Integration Keywords TABLE 1

Additional information

Standard Title	D7590-09 Standard Guide for Measurement of Remaining Primary Antioxidant Content In In-Service Industrial Lubricating Oils by Linear Sweep Voltammetry
Published Code	ASTM
Publication Date	2009
Pages Count	14

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ASTM-D7590 2009

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