Machinery Lubrication


Machinery Lubrication magazine published by Noria Corporation

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ML GROUP PUBLISHER Brett O'Kelley - SENIOR EDITOR Jim Fitch - TECHNICAL WRITERS Wes Cash - Bennett Fitch - Matthew Adams - Devin Jarrett - Travis Richardson - GRAPHIC ARTISTS Patrick Clark - Josh Couch - Matt Berkenbile - ADVERTISING SALES Brett O'Kelley - MEDIA PRODUCTION COORDINATOR Sheryl Adekoya - CORRESPONDENCE You may address articles, case studies, special requests and other correspondence to: Editor-in-Chief MACHINERY LUBRICATION Noria Corporation 1328 E. 43rd Court • Tulsa, Oklahoma 74105 Phone: 918-749-1400 Fax: 918-746-0925 Email address: MACHINERY LUBRICATION Volume 21 - Issue 5 September - October 2020 ( USPS 021-695) is published bimonthly by Noria Corporation, 1328 E. 43rd Court, Tulsa, OK 74105- 4124. Periodicals postage paid at Tulsa, OK and additional mailing offices. POSTMASTER: Send address changes and form 3579 to MACHINERY LUBRICATION, 1328 E. 43rd Court, Tulsa, OK 74105-4124. SUBSCRIBER SERVICES: The publisher reserves the right to accept or reject any subscription. Send subscription orders, change of address and all subscription-related correspondence to: : Noria Corporation, 1328 E. 43rd Court, Tulsa OK 74105-4124. 918-749- 1400 or Fax: 918-746-0925 Copyright © 2020 Noria Corporation. Noria, Machinery Lubrica - tion and associated logos are trademarks of Noria Corporation. All rights reserved. Reproduction in whole or in part in any form or medium without express written permission of Noria Corpo- ration is prohibited. Machinery Lubrication is an independently produced publication of Noria Corporation. Noria Corporation reserves the right, with respect to submissions, to revise, republish and authorize its readers to use the tips and articles submitted for personal and commercial use. The opinions of those interviewed and those who write articles for this magazine are not necessarily shared by Noria Corporation. CONTENT NOTICE: The recommendations and information provided in Machinery Lubrication and its related information properties do not purport to address all of the safety concerns that may exist. It is the responsibility of the user to follow appro - priate safety and health practices. Further, Noria does not make any representations, warranties, express or implied, regarding the accuracy, completeness or suitability of the information or recommendations provided herewith. Noria shall not be liable for any injuries, loss of profits, business, goodwill, data, interruption of business, nor for incidental or consequential merchantability or fitness of purpose, or damages related to the use of information or recommendations provided. below (most common) or above the oil phase depending on oil density. e new third state is emulsified water. Water that is held tightly in micro-globules in the oil is no longer referred to as free water. Instead it has been more accurately referred to as emulsified water or a microemulsion. Emul- sified water does not separate quickly, or at all in many cases. is is due to polarity, relating to cohesive forces between the water and the oil, especially its additives. Also influencing this is the high oil-water interfacial area which relates to the contact area between the water and the oil. e smaller the water globule, the greater the relative interfacial area of water contacting the oil, which holds the water tighter and longer in the body of the oil. Stoke's Law plays a role too (Google it). These micro-glob- ules are basically locked in the body of the oil and as such become a homogeneous part of the oil, physically and chemically. ey are what cause the oil to become hazy or cloudy depending on oil concentration. is note- worthy parameter is referred to as turbidity, which actually increases the oil's viscosity. Figure 1 shows three samples of hydraulic fluid. "In the last 30 years or so most of the literature, including Noria's publications, refer to water as having three states. "

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