Moisture Corrosion Characteristics of Universal Gear Lubricants

A full  scale axle  gear  unit is used  for this test. Before the test , the  parts  are cleaned as follows: immerse   in a 1 per cent solution of Sodium Hydroxide  for  1 hour. Rinse  the  parts with water  until free  of caustic....

Chemical Activity Toward Copper of Universal Gear Lubricants

This test, which provides for  immersion  of a clean  copper strip in a  sample  of the  lubricant for a  prescribed  time  and  at a given  temperature, rates the  strip at the  end  of the test  as follows: “ At the conclusion ...

Carbon Residue of Oils

These methods provide  some  indication of the  coke forming tendencies  of oils and  hence have  little  application  to gear  lubricants. Also oils  containing ash – forming  ingredients will have  erroneously  high  carbon residue....

Sulfated Residue, Lead, Iron and Copper in Lubricating Oils

In this  methods, the sample  is completely  oxidized  by wet  ashing  with  concentrated  sulfuric acid, concentrated  nitric  acid and  hydrogen  peroxide, or  if  only iron and copper  are  to be  determined,...

Calcium in Lubricating Oil

While the ASTM Methods and Fed. Test Method use the same sample  for  determination  of  several  metals, the IP  Methods  is  specifically concerned with  calcium  analysis. This calls  for ashing  followed  by determination ...

Thermal Oxidation Stability of Gear Lubricants

This test is used to determine the deterioration of lubricants, particularly EP gear oils, under severe oxidation conditions. The sample  is  placed in a gear case in which a spur gear  set and a test  bearing  operate under load  while  heat  is applied and ...

Boron Compounds as EP Agents

Boron compounds have been  recommended as EP agents and also for other  purposes in fluid lubricants; hence, they may have a place in gear oils. Thus, organic borates  for  use in mineral oils to  prevent  excessive oxidation is  claimed. The use  of  compounds ...

Identification of Gear oil Additives

Verification of the presence of  various additives  in gear oils is often of  interest and different methods have been  suggested for the purpose. To identify dialkyldithiophosphate additives in lubricating oils, lewkowitsch  isolated  the  compounds in the form...

Lubrication of Non-Reactive Surfaces at High Loads

By non-reactive is meant that the  surface will not react with  what  are  customarily  known  as EP elements such as  chlorine, phosphorus, or sulfur compounds. While there is little likelihood of extensive use of  some metal  combinations, it is well ...

Deodorizing Gear Lubricants

Straight mineral oils should have no offensive odor. Lubricants containing EP agents will  often  have odors which  are not  too pleasant. However, when in an  enclosed gear case  this will  not  be  particularly  noticeable  unless the ...

Self Repairing Surfaces on Gears

Some thought has been given to addition of material to lubricants which would aid in providing a more uniform surface on gear faces as  they operated. Thus,  a report was  made of the use  of molybdenum disulfide particles, mixed with the lubricant, which were  presumed to...