Machinery Lubrication

Machinery Lubrication March April 2017

Machinery Lubrication magazine published by Noria Corporation

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Page 23 of 88 | March - April 2017 | 19 two dissimilar types of oil, and carbon insolubles from thermal failure can all darken oil. There is also a possibility that the oil dark- ening is due to a photochemical reaction from sunlight exposure. Measuring color is based on a visual comparison of the amount of light transmitted through a defined depth of oil. This can be done with a predefined test method and instrumentation or a subjective view of the oil with reference to a color gauge. In either case, there may be a number of variables to monitor for quality results. The ASTM D1500-07 test method can be used to compare the color of an oil sample to a glass slide. This test is used in lubricant manufacturing for quality-control purposes. It is performed using a standard light source to match a sample to a glass slide. Values for the glass range from 0.5 to 8.0 in 0.5 increments. If the sample falls between two colors, the higher number is reported. If no color gauge is available, the oil color is compared to a previous sample or a new oil sample. It should be noted that color is added using dyes in some cases to help identify the type of lubricant, such as red for automatic transmission fluid. Nevertheless, an oil with a specific color should never be assumed to be a certain type of oil. It is also important to remember that there is no particular oil color that would require an oil change. If you have a question for one of Noria's experts, email it to High-performance lubrication for high- demand applications. When it has to work, rely on Molykote ® brand specialty lubricants. Get smart greases, anti-seize pastes, multipurpose oils, specialty compounds, dispersions, anti-friction coatings and more. For more than 65 years, we've been the experts you trust to help extend equipment life, improve energy efficiency and reduce downtime and maintenance costs by effectively reducing friction and wear. For more information about Molykote ® specialty lubricants, visit Smart lubrication. ™ Molykote is a registered trademark of Dow Corning Corporation. Smart Lubrication is a trademark of Dow Corning Corporation. The Corning portion of the Dow Corning trademark is a trademark of Corning Incorporated, used under license. © 2017 Dow Corning Corporation, a wholly owned subsidiary of The Dow Chemical Company. All rights reserved. Images: AV10013, AV19512, AV19520, AV13207, AV01056, AV11797. GREASES | PASTES | OILS | COMPOUNDS DISPERSIONS | ANTI-FRICTION COATINGS

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