Common questions

What is ferrography analysis?

What is ferrography analysis?

Ferrography is a specialized type of oil analysis used to study particle wear on machine components through analysis of contaminants in lubricating oil. It can be used to predict and diagnose errors occurring on machinery. Ferrography is related to tribology, which is the study of friction between interacting surfaces.

What is ferrography used for?

Ferrography is a technique that is used to monitor for wear modes that are undetectable to spectroscopy. It is used to predict and diagnose equipment problems. It is a series of laboratory tests used to determine the condition of used lubricants and equipment components, over a period of time.

What is direct reading Ferrography?

Direct reading (DR) ferrography measures the amount of ferromagnetic wear debris in an oil sample, commonly referred to as the ferrous density reading. The results of DR ferrography are generally given in terms of DL for particles greater than five microns in size and DS for particles less than five microns.

What is Ferroscope?

A red light source illuminated above the Ferrogram causes the light to be reflected off particles and a green light source below the Ferrogram causes light to be transmitted. Any metallic particles will reflect light and non-metallic particles will transmit light.

Why is wear particle analysis important for old equipment?

Wear particle analysis is a powerful technique for non-intrusive examination of oil-wetted parts of a machine. The particle characteristics are sufficiently specific so that the operating wear modes within the machine may be determined, allowing prediction of the imminent behavior of the machine.

What is wear debris analysis?

Wear debris analysis is one of the key techniques to evaluate wear particle counts and measure their sizes for the tested fuels. This study was conducted using the wear debris analysis by SEM/EDX on the filtered metal debris samples. The samples were collected by filtering the oil from the four-ball tribotester.

What are the advantages of soap over Ferrography?

SOAP is a Proactive Condition Monitoring/Maintenance tool/technique which helps to assess the relative wear conditions of the lubricated/Oil-wetted parts on the basis of the concentration of the Wear particles in the Used Oil. Besides, it can also indicate the rate of Wear & its source.

What is wear particle concentration?

Wear Particle Concentration (WPC) is the sum of DL+DS divided by sample size (volume). A key aspect of ferrography is that machines wearing abnormally will produce unusually large amounts of wear particles, indicating excessive wear condition by the DR Ferrograph in WPC readings.

What is laminar wear?

Laminar particles are the most characteristic fatigue wear particles generated in rolling element bearings. Laminar particles are the result of microspalling that has further deteriorated into visible surface pitting and spalling.

How wear and debris analysis is useful?

Wear debris analysis was carried out on used greases by extracting magnetic particles from the sample using a magnet. Microscopic analysis of the sample identified numerous small and large spherical particles. Research has shown that spherical wear debris can reveal the severity of rolling-contact fatigue wear.

What does an oil analysis tell you?

By analyzing a sample of used engine oil, you can determine the amount of contamination, the wear rates and overall condition of your engine. The real benefit of an oil analysis is that it acts as an early warning system, alerting you to potential problems before they become an equipment failure.

What is a soap test in aviation?

Spectrometric Oil Analysis Program (SOAP) is a method used by aircraft operators, including several Air Forces of the World, to test the health of aircraft engines by performing frequent laboratory testing of the engine oil. The tests reveal the chemical composition of any metal particles suspended in the oil samples.