Engine Oil Analysis

Engine Oil Analysis from Roktex oil analysis

By: Roktex oil analysis  18-Sep-2011
Keywords: Analysis, Enging Testing, Take Care of Your Engine,

The following tests will be performed on samples provided to Roktex Moisture Content Moisture determinations using coulometric Karl Fisher (KF) method ASTM D6304C (sometimes referred to as KF water) expressed in % mass on in-service samples covering a broad range of water content are used as calibration standards so that moisture content can be determined using Fourier Transform Infrared (FTIR). Wear Metals The analysis of wear metal concentration in sample using Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES). Contamination Metals The analysis of contaminant metal concentration in sample using Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES). Additive Metals The analysis of additive metal concentration in sample using Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES). Fuel Dilution Measures Diesel Fuel Contamination by Gas Chromatography. Accurate to 0.1% fuel content and can detect the presence of either raw fuel, indicating injection system inefficiency or unburnt fuel residue which may, depending upon the amount present, indicate compression problems with the engine. Oxidation and Nitration Values By examining the "fingerprint" of a lubricant by Fourier Transform Infrared (FTIR) its characteristics can be established. Oxidation and nitration values in new oils reflect the presence of additives and base oil compositions. Total Base Number An oil's ability to counteract the effects of corrosive gases caused by exhaust gases from blow-by past the rings is called the Total Base Number (TBN). This reserve alkalinity was more important in the past when fuel sulphur levels were upwards of 2000 to 5000 mg/kg resulting in a significant amount of corrosive gas formation of sulphur and inherently nitrogen oxides. With fuel sulphur levels being legislated down to 500ppm maximum, and soon to be 50 ppm, the importance of TBN has decreased. TGA Soot Actual soot determinations using Soot by Thermogravimetric Analysis (TGA) method ASTM D5967 expressed in % mass on over 1000 samples of in-service samples covering a broad range of soot content were used to establish a calibration equation so that TGA Soot content can be determined using Fourier Transform Infrared (FTIR) up to 6 % mass.

Keywords: Analysis, Enging Testing, Take Care of Your Engine,

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