Determination of zinc in lubricating oils and lubricating oil concentrates

1968 ◽  
Vol 239 (1) ◽  
pp. 33-36 ◽  
Author(s):  
K. S. Anand ◽  
Prabhu Dayal ◽  
O. N. Anand
1957 ◽  
Vol 29 (8) ◽  
pp. 1223-1223 ◽  
Author(s):  
P. B. Gerhardt ◽  
E. R. Hartmann
Keyword(s):  

2021 ◽  
Vol 68 (3-4) ◽  
pp. 22-28
Author(s):  
Bettina Ronai ◽  
Rainer Franz ◽  
Marcella Frauscher

Water and solid particulate contamination are the two most common contaminants of lubricated systems and may be highly problematic for these systems. To reduce downtime and prevent failure, lubricant formulations contain detergent and dispersant additives that play an important role in terms of contamination tolerance. In lack of a practical procedure for the determination of the relevant properties, a novel method for the evaluation of the dispersing ability of lubricating oils is introduced. Following and combining established lubricant analysis methods, a procedure with optimum parameters was found. An assessment of the method using fresh and artificially altered lubricating oils allowed a differentiation concerning their dispersing ability.


2019 ◽  
Vol 70 (11) ◽  
pp. 3942-3946
Author(s):  
Gabriel Radulescu ◽  
Diana Cursaru

Obtaining the commercial lubricating oils through an industrial method is a process which has an extensive complexity, requiring a very special attention paid to the final products quality. In this field, any new mixing compound, any new additive and any process improvement is more than welcome. Using the so called optimal mixing recipes � in order to get commercial lubricating oils by the base oils and corresponding additives � is a common way to lower the production cost and increase its quality. This paper proposes an original software tool, developed by the authors, which offers these recipes based on the final mixture properties (explicitly given). The application is built-up around the nonlinear programming and runs under MATLAB� environment. It is a remarkably robust application, with good functionality and accuracy. Its performance is proved both in theory and practice, after laboratory experimental tests.


1942 ◽  
Vol 14 (2) ◽  
pp. 122-123 ◽  
Author(s):  
Harry Levin ◽  
F Farrell ◽  
A Millendorf
Keyword(s):  

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