Analytical Ferrography (A-Fer)

Morphological analysis of equipment’s wear mode

The Analytical Ferrography technique is in use since 1970. It provides Microscopic Examination and Analysis of Debris (particles) found in lubricating oils. These particles consist of metallic and non-metallic matter.

  • The metallic particle is a wear condition that separates different size and shapes of metallic dust from components like all type of bearings, gears or couplings (if lubricated in path).
  • Non-metallic particle consists of dirt, sand or corroded metallic particles.

Analytical Ferrography reveals both the wear mode(s) present as well as the alloy compositions of the wear particles present. A clear picture is given of the component(s) that are wearing in the system. Often Analytical Ferrography identifies catastrophic wear modes, when typical ppm wear metal does not show any sign of the wear condition.

Analytical Ferrography can pinpoint specific component failure modes, thereby allowing maintenance to take action to avert a catastrophic equipment failure.


1) Provides detailed morphological analysis of wear mode present in equipment; determines the number, size and shape of wear particles

2) Goes beyond typical part per million (ppm) wear analysis

3) Can categorize alloy types of wear particles

4) Provides necessary info to make accurate and decisive maintenance decisions.

5) Testing for a.o. General Industry, Power stations, Chemical Plants, Railroad Industry, Food procesors etc.

6) Products monitored with Ferrography testing are: steam turbines, heat transfer/treatment systems, engines, pumps, compressors, gas/steam turbines, grease lubricated bearings etc.

Standard: ASTM D7690