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Ferrography

Test instrument: microscope
Sample quantity: 10 ml
Analysis for: gear oils, hydraulic oils, engine oils
Brief description: For sample preparation, the oil quantity is guided over an inclined object slide which is mounted at a defined angle above a magnet. This causes magnetizable particles to arrange in a "track" from large to small on the slide. Non-magnetic particles are then also held on the slide by these. The resulting linear ferrogram is then evaluated under the microscope by an experienced expert.
Statement:

The type and quantity of particles produced in a system are typical of this one system. Consequently, one can derive statements on wear processes in the system from the type and quantity of the particles "produced" by the system.

Ferrography enables the experienced expert to draw conclusions about the wear processes that led to the formation of the particles by looking closely at the particles under a microscope.

Thus, statements can be made about the extent to which different wear mechanisms, such as abrasive wear, adhesive wear, fatigue wear have a share in the particles produced or to what extent non-metallic particles are also present in the lubricant.