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 to mention the possibilities. Thus,Antler
suggests that 0.03 to 10 per cent of trimeric tin
sulfide compounds in either oils
or lubricating greases will
increase the anti wear qualities of the lubricant on surfaces such
as titanium-on-titanium, stainless
steel-on-stainless steel, or gold-on-gold. The same additives are also said to be
effective on plastics, such as “nylon”, polyvinyl chloride, polyethylene, etc.
Chromium is inert to most sulfur
compounds but will react
with most chlorine compounds. Consequently, in lubricating stainless steel gears
under heavy loads, the
use of chlorine compounds is dictated.
Manufacturers of gears
from special metals or
other materials will no doubt have
suggestions as to the proper
lubricants. Since EP agents are not
effective on Babbitt, use of
such compounds in lubricants for certain journal bearings will
not increase the
lubricating value.
