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ASTM D7690 : 11

Standard Practice for Microscopic Characterization of Particles from In-Service Lubricants by Analytical Ferrography

Standard Details

1.1 This practice covers the identification by optical microscopy of wear and contaminant particles commonly found in used lubricant and hydraulic oil samples that have been deposited on ferrograms. This practice relates to the identification of particles, but not to methods of determining particle concentration.

1.2 This practice interfaces with but generally excludes particles generated in the absence of lubrication, such as may be generated by erosion, impaction, gouging, or polishing.

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

General Information

Status : Historical
Standard Type: Main
Document No: ASTM D7690 : 11
Document Year: 2011
Pages: 11
  • Section Volume:
  • 05.04 Volume 05.04 Petroleum Products, Liquid Fuels, and Lubricants (IV): D6973-D7755
  • ICS:
  • 75.100 Lubricants, industrial oils and related products

Life Cycle

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ASTM D7690 : 11
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