Machinery Lubrication

Machinery Lubrication July August 2015

Machinery Lubrication magazine published by Noria Corporation

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4000 3500 3000 2500 2000 1500 1000 500 .5 0 1 1.5 2 Absorbance Wavenumber (cm -1 ) Phosphate Ester Contamination in Petroleum-Based Gear Oil 50% of lubrication professionals use FTIR testing in their oil analysis program, according to a recent survey at MachineryLubrication.com be expected when two oils with different chemical compositions are added together because of cross-contamination. The fi gure below shows the FTIR spectrum of a blend of a polyalphaolefi n-based synthetic oil and a phosphate ester electro-hydraulic control (EHC) fl uid. By recording the FTIR spectrum of the suspected blend along with the known new oil reference spectra of the pure polyal- phaolefi n and pure EHC fl uid, this accidental mixing can be confi rmed. In fact, when an unknown contamination issue is suspected, it often is advisable to immediately run an FTIR spectrum in conjunction with a fresh new oil reference whenever possible. FTIR is a valuable addition to any oil analysis program. By understanding how the technique works as well as its strengths and limitations, oil analysts and end users can obtain a vast amount of information when utilizing it alongside other standard test methods and strategies. About the Author Jeremy Wright is the vice president of tech- nical services for Noria Corporation. He serves as a senior technical consultant for Lubrication Program Development projects and as a senior instructor for Noria's Machinery Lubrication I and II training courses. He is a certifi ed mainte- nance reliability professional through the Society for Maintenance and Reliability Professionals, and holds Machine Lubricant Analyst Level III and Machine Lubrication Technician Level II certifi cations through the International Council for Machinery Lubrication. Contact Jeremy at jwright@noria.com.

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