| Super Lubricity Additive
Fuelsav®
Our decade long research leads to
the breakthrough on friction reduction of hydrocarbon lubricants by our functional
fluoropolymer additives. We tested this new product on road tests that proven a 25%
fuel saving. It is unknown for any product on the market which could
provide such great fuel saving. We have US patent pending. We conducted
a pilot production. The product,
lubricant additive
Fuelsav®, made by pilot production provides the opportunity for
further road tests.
One important concept is super-lubricity additive
for lubricants. It shift mixed friction regime into hydrodynamic
friction regime. Our lubricant
additive
Fuelsav® fits into such definition. Not only it shift mixed
regime into hydrodynamic regime, but also it reduces lubricant friction
further in hydrodynamic regime.
Fuelsav® shifts hydrodynamic regime into elasto-hydrodynamic
regime which has the lowest friction forces. Engines are desired to be
operated in elasto-hydrodynamic regime when engine reach ideal operation
condition. There is no known additive that could bring such shift. The
fuel saving results coincide with such analysis.
Stribeck
Diagram: The tribological effect
of FuelSav®
that contains superlubricity
(SL) additive and extreme pressure (EP)
and anti-wear (AW) additive
that reduce
friction and wear.
µ - Coefficient of
Friction;
ƞ ¨C Viscosity;
v ¨C Sliding Velocity,
P ¨C Applied Pressure
Courtesy
of E-Ion Additives
& Advantages
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For save energy lower viscosity, thinner engine oils have been
developed. There is
a limitation. Thinner oils have advantage of lower viscous dissipation,
however, the disadvantage of high friction losses and high engine wear.
Thinner oils alone do not provide obvious saving. The maximum reported
fuel save is about 1% percent for 5W20 engine oils. The fuel saved is a
small amount when comparing the costs on engine wear.

Courtesy of E-Ion Additives
Many research proposed to use fluoropolymers to reduce friction
between metal parts, such as PTFE (Teflon), or micronized PTFE. However,
the application obstacles of micronized PTFE is insolubility and lack of
functionality.
Their application is questionable.
For save energy we use a different
approach: ionic liquid crystal fluorinated surface films formed by lubricant additive Fuelsav®.
The performance of lubricant additive Fuelsav® is related
to the structures of functional fluoropolymers:
Lubricant additive
Fuelsav® has
ionic metal bonding groups.
Lubricant additive
Fuelsav® is ionic liquid crystal material. It form
ionic liquid crystal surface films with functional groups activated by
tribochemical surface reactions. These surfaces films are gel-like or
sponge-like properties.
The ionic liquid crystal surfaces films retains lubricant oil in
sponge-like surface layers.
When relative movement is slow or in static condition, ionic liquid
crystal phase have high viscosity that protect engine parts during cold
start. When relative movement is fast, ionic liquid crystal phase of
fluoropolymer change conformation, The chains in polymer are stretched
and form lamellar layers that greatly reduce friction in
elasto-hydrodynamic regime.
Different with most fluoropolymers, the fluoropolymer lubricant
additive Fuelsav® is soluble in lubricant oils. The solubility in
lubricant oil provides the
important feature: self-renewability of the fluoropolymer surface films formed by
Fuelsav®.
The fluoropolymer surface films formed by lubricant additive
Fuelsav® has the advantage of retaining lubricant oil
into fluoropolymer surface films with oleophilic groups. Extreme
important is that fluoropolymer surface films smooth,
slick and reduce surface boundary layer thickness with ionic liquid
crystal surface film.
As result, lubricant additive
Fuelsav® shifts boundary and mixed
friction into elasto-hydrodynamic regime that dramatically increase fuel
economy (20-30%).
A)
The
sponge-like surface films formed by
FuelSav®
retain
lubricant oil on metal surfaces by oleophilic functional groups.
B)
The sponge-like surface films by
FuelSav®
expand
elasto-hydrodynamic regime (film lubrication) and squeeze boundary
lubrication regime. Combined with EP/AW additives (nano-, submicron
functional PTFE
contained in
FuelSav®.)
It results
in greatly
reduction on friction and wear under broad ranges of lubrication
conditions.
The piston ring/linear sets and valve trains are worked under mixed
regime in most engine cycles and contributes majority of engine friction
losses. The sponge-like surface films shift mixed regime into film
lubrication regime, and greatly reduces the friction and wear.
C)
The gel-like fluoropolymer surface films by
FuelSav®
smooth and slick surfaces that reduce the boundary layer thickness
(super lubricity). That reduces the energy losses during turbulence
flow. It further reduces the friction of elasto-hydrodynamic lubrication
regime.
D)
Surface films formed by
FuelSav®
are fluoropolymer
that protect metal
surfaces from oxidation and corrosion even under high temperatures.
By lowering friction
and wear, FuelSav® boosta the advantage of low viscous dissipation of
thinner oils. The synergistic effects of FuelSav® with thinner oils
promote fuel economy and engine life-span.Additional advantage
of
Fuelsav® are:
Lubricant additive
Fuelsav® provides saving by reduce
lubricant oil consumption,
Lubricant additive
Fuelsav® provides by extends oil drain interval.
Lubricant additive
Fuelsav® are polymers which has low
volatility that do not poisoning catalysts in converter.
Lubricant additive
Fuelsav® provides saving by extend engine lifespan.
A) Lubricant additive
Fuelsav® forms
fluoropolymer surface films that reduce friction by replace metal/lubricant/metal
lubrication with
fluoropolymer/lubricant/fluoropolymer lubrication.
B) The fluoropolymer surface films formed by
lubricant additive
Fuelsav®
retains lubricant oil on
surfaces.
The fluoropolymer surface films formed by lubricant additive
Fuelsav® avoid oil dried or oil deficient surfaces,
and therefore, shift mixed lubrication regime into hydrodynamic regime.
C) The EP and AW additives provided in base oil and AW additive in
Fuelsav® shifts down
the friction forces in boundary lubrication regime. That help to reduce
friction and wear during cold start.
D) The fluoropolymer surface films formed by lubricant additive
Fuelsav® shifts mixed lubrication regime
into hydrodynamic gegime due to
lubricant oil retained in surface films and the
nature of fluoropolymer/oil/fluoropolymer friction instead
metal/oil/metal friction. The piston ring/linear sets and valve trains
are worked under mixed regime in most engine cycles and contributes
majority of engine friction losses. Therefore, the fluoropolymer surface
films formed by lubricant additive greatly reduces the friction and wear which
would be present by metal/oil/metal friction in mixed lubricant regime,
E) The ionic liquid crystal phase of fluoropolymer surface films formed by
lubricant additive
Fuelsav® smooth and slick surfaces that reduces the
boundary layer thickness. The liquid crystal layered surface films reduces
the momentum transfer and energy losses during turbulence flow. As the
result, it further reduces the friction of elasto-hydrodynamic
lubrication regime.
F) Lubricant additive
Fuelsav® forms
surface film that protects metal parts from corrosion by
fluoropolymer film bonded by metal-phosphate chemical bonds.
G) The formation of fluoropolymer/oil/fluoropolymer lubrication
retains lubricant oil in gel-like surface layer with hydrodynamic
friction regime with low friction forces and less wear, regardless when
lubricant has low viscosity, and therefore, open the opportunity to
utilization of lower viscosity and lower friction thinner lubricants,
and increase fuel economy.
Synergistic effects of FuelSav® with
thinner oils retain low viscous losses, low friction and low wear.
FuelSave® saves your fuel costs 10%-25% when mixed with thinner oils (5W20
for gasoline engine &
5W30
for diesel engine.) as shown the following
diagram:

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Correlation diagram
between fuel efficiency and oil viscosity:
Thinner oil have low viscous losses but high friction losses and high
wear. FuelSav® reduces friction losses and wear, save fuel when mixed
into low viscosity lubricant oils
What is the lubricant additive
FuelSav®?
Lubricant additive is
compounds that improve the performance of lubricants,
such as engine oils, transmission fluids, steering fluids, gear oils,
etc. Lubricant additive
FuelSav® is discovered by the combination of bio-mimetic
research on fish skins for drag reduction and the application of functional fluoropolymers
on lubricants. There are three type functional groups. (1).Metal bonding
sites bonding on metal surfaces to form fluoropolymer surface film.
(2).Oleophilic groups provide solubility in lubricant oil and hold
lubricant in surface films. (3). The oleophobic fluorine-carbon group to
create phase separation with lubricant.
How friction acts in automobile?
Conventional friction for metal/oil/metal
lubrication have three lubrication regimes: boundary, hydrodynamic, and
mixed.
When metal parts have lubricant film on surfaces,
the friction is hydrodynamic.
When metal parts contact each other without lubricant
between metal surfaces, or under extreme pressure where the lubricant is
squeeze out: the friction is boundary
lubrication regime.
The mixed regime is the conditions between
hydrodynamic and boundary lubrication, it means a part of surfaces are
touched through asperities without sufficient lubricant film.
A significant energy has been wasted by frictions. The
piston ring-cylinder liner system and valve trains are the largest contributor to friction
energy wastage in modern internal combustion engines. Top piston rings
in a large part of the engine cycles contact on liner surfaces with
dried or poor oil supply conditions. Oil control piston rings are pushed
against liner surfaces under high tension forces with very low oil film
thickness. Piston ring pack and valve trains in a significant part spent in boundary or
mixed lubrication regime. Boundary and mixed regime have more than 10
times friction than in hydrodynamic regime.
Lubricant additive
FuelSav®
replace
conventional metal/oil/metal lubrication with
fluoropolymer/oil/fluoropolymer lubrication.
How lubricant additive
FuelSav®
reduces frictions?
Lubricant additive
FuelSav® forms surface
film that retains lubricant oil and remove the conditions for mixed
lubrication regime and greatly reduce friction.
After Lubricant additive
FuelSav® mixed lubrication region
is shifted into hydrodynamic regime.
Lubricant additive
FuelSav® reduce friction and improve fuel economy.
Full scale engine tests on IVA, IIIG, fuel economy & energy
conservation, and road drive tests on highway and in city by both
gasoline engine cars and diesel engine trucks proven that it save more
than 20%
fuel
Low viscosity lubricant oils such as 5W20, 5W30
are recommended.
How lubricant additive
FuelSav® provides with such
great save?
1) Change the lubrication mechanism.
FuelSav® lubricant additive
change the metal/lubricant/metal lubricating into
fluoropolymer/lubricant/fluoropolymer lubricating.
The lubrication between moving metal parts change from metal/oil/metal
to lubrication between fluoropolymer/lubricant/fluoropolymer.
Fluoropolymer/lubricant has the lowest friction coefficient known. It
means original metal/lubricant/metal lubrication changes into
fluoropolymer/lubricant/fluoropolymer lubrication, and save energy.
Research discovered that fish mucus reduces drag up
to 65%. Marine organism research discovered: (i) a layer of water
immediately adjacent to skin causes most of friction ¨C the boundary
layer, (ii) the thickness of boundary layer is proportional to amount of
friction. Fish mucus reduces the thickness of boundary layer by
¡°smoothing it¡± or ¡°slickening it¡±.
(1)
Lubricant additive FuelSav® forms a linear polymer having suitable
solubility in lubricant oil.
(2)
Lubricant additive FuelSav® forms a surface film on metal parts
by tribochemical reaction..
(3)
Lubricant additive FuelSav® forms a surface film constantly renewed and
regenerated;
(4)
Lubricant additive FuelSav® forms surface film with chemical bonding on
metal surface.
(5)
Lubricant additive FuelSav® forms surface film
having gel-like or oil sponge-like structures that retains lubricant oil on
the metal surface . It
remove the possibility of oil dried area on surfaces, the boundary
lubrication region, and greatly reduce friction and wear.
(6)
Lubricant additive FuelSav® forms surface film on metal parts changes
lubrication nature to replace metal/oil/metal with
fluoropolymer/oil/fluoropolymer, and greatly reduces friction and wear.
(7) Lubricant
additive FuelSav® forms surface film having liquid crystal phases with
lubricant oil is similar to the liquid crystal phase formed by fish
mucus polymer in water.
(8) Lubricant
additive FuelSav® forms surface film on metal parts to reduce the boundary
layer thickness and momentum transfer through the turbulent boundary
layers to reduce friction in hydrodynamic lubrication region.
(9)
Lubricant additive FuelSav® protects metal parts from chemical corrosion
and high temperature oxidation.
(10)
Lubricant additive FuelSav® provides ideal lubricant viscosity
adjustments: increases lubricant viscosity when at a slow flow or at
static conditions, and reduces lubricant viscosity when at a fast flow.
How the structure of functional fluoropolymer of
FuelSav® fits in the
requirements of lubricant additive?
(1) Having
a chemical structure with oleophilic groups to provide sufficient
solubility in lubricant oil phase, and capability to store lubricant oil
in oleophilic groups.
(2) Having
a chemical structure with pendent phosphorus-containing groups as metal
bonding sites that are highly reactive with metal and metal oxide on
metal surfaces, resulting in strong chemical bonds;
(3) Having
chemical structure with suitable solubility in lubricant oil and metal
bonding site to form surface film. The surface film is constantly
renewed and regenerated wherever wear off of surface film occurs.
(4) Having
chemical structure form surface films to retain lubricant oil on the
surface even under poor lubricant supply conditions, therefore, to
eliminate boundary lubrication region and reduce friction and wear.
(5) Having
chemical structure with oleophobic fluorocarbon bonds that form phase
separation and liquid crystal with lubricant;
(6) Having
a chemical structure with multiple fluorine-carbon bonds units providing
chemical, oxidation, and high temperature resistance;
(7) Having
a plurality of oleophobic fluorine-carbon bonds in copolymer form a
separate liquid crystal boundary layer to smooth or slick surface films
that reduce the thickness of the boundary layer and the rate of momentum
transfer through the boundary layer during the turbulent hydrodynamic
flow of lubricant, greatly reducing friction and drag under hydrodynamic
region.
(8) Having a chemical structure to form liquid crystal network with a
hydrocarbon lubricant results in an increase in lubricant viscosity when
the system is in slow movement or static condition, and reduce
wear and friction.
(9)
Having a chemical structure to form fluorocopolymer surface film capable
of providing corrosion protection for metal surfaces;
(10)
Having a polymer chemical structure, therefore, very low vapor pressure,
resulting in environmental friendly, and avoids poisoning the catalyst
in the exhaust converter.
What are other benefits of lubricant additive
FuelSav®?
1) Reduce lubricant consumption by the benefit of
dynamic reduced clearances between piston rings and cylinder liners.
Lubricant pumped from crankcase into combustion chamber greatly reduced
with dynamic reduced clearance between piston ring and cylinder liners.
2) Keep lubricant oil cleaner by reduced wear of
metal parts, and reduced contamination by combustion mixture and carbon
shoots leaking from combustion chamber into crankcase.
3) Keep engine running quiet and smooth by sealing
leaking from combustion chambers into intake and exhaust ports between
valve/valve seat having dynamic reduced clearances by fluoropolymer
films. Every time when fire of fuel-air mixture is initiated (by spark
plug in gasoline engine or by compress in diesel engine), sudden fired
combustion mixture create explosion, the explosion sound is leak out
into exhaust system.
FuelSav® creates fluoropolymer
seals between valve and valve seat, the fire explosion noise sound
greatly reduced.
4) Lubricant additive
FuelSav®
is fluoropolymer. Polymers have very low vapor pressure compare to small
molecular sulfide or phosphorus-containing compounds. Chemical bonded
phosphoric functional groups by fluoropolymer have very low emission.
The vapor pressure of
FuelSav® Is far below EPA
standard of 400 ppm phosphorus. It protect catalyst in exhaust
converter. Reduced lubricant pumped into combustion chambers, therefore,
reduced sulfide and phosphorus emissions. Manufacturers have added
lubricant additive of organo-sulfates and organo-phosphates into
lubricant oil. Those organo-sulfides and organo-phosphorus have mediocre
performance but have high vapor pressure due to small molecular weight
natures.
5) Protect engine metal parts
from corrosion by phosphoric functional fluoropolymer films.
6) Increase lubricant filter life-span by reduce
contamination of leaking combustion mixtures and carbon shoots from
combustion chamber into crankcase.
7) Reduce energy waste on friction and save
energy. Reduce fuel consumption and reduce lubricant combustion and
therefore, reduce emission of carbon dioxide. Replace hazardous
lubricant additives to protect environmental.
Why Teflon (PTFE), tungsten sulfide, molybdenum sulfides
do not work as motor oil lubricant additive?
All solid lubricant additives work with
grease lubricants for extreme pressure condition. Gear, bearing, and
valve train and others in internal combustion engine are design for lubrication
by motor oils. Motor oils require
filtrating off all hard solid particles from the lubricant system to protect
moving metal parts from wear. The filters are worked by filtrating by
the size selection of particles, but not on the hardness of the
particles. Therefore the solid particles of Teflon (PTFE), tungsten
sulfide, molybdenum sulfides will be filtrated before getting into
lubricating system. Nano particles and submicron particles will go
through the filter and perform function when they entering the
lubricating system. However, piston ring/linear system may be benefit
from Tefron (PTFE) and metal sulfide micronized particles because no
filter is involved.
Do micronized Teflon form a Teflon film on engine
metal parts?
No. Teflon is
polytetrafluoroethylene (PTFE), a thermoplastic with a high melt
points (450 C or 840 F). You need bake to high temperature (not possible
in engine operating conditions) to melt it to form films. Micronized
Teflon powders are 5-20 micron size aggregates of PTFE particles.
However, The aggregate cannot be de-aggregated, or form a continuous
film by simple known methods. Teflon, including micronized or
nano-particles PTFE have no functional groups, insoluble, nor dispersed
in lubricant oil. Therefore, they cannot bond to any metal surface or
form any kind of continuous film after add into crankcase. It will not
perform reduce friction function. It do harm your lubricant system by
clog and block motor oil filter. Because motor oil filter is an
important element to guarantee proper oil pressure to supply lubricant
to engine moving parts. Filter is designed to trap any large
particles of dirt. A new lubricating oil filter retains all particles
over 15 microns in diameter, 95% of all particles over 10 microns, and
90% of all particles over 5 microns.
What happen when lubricant additive
FuelSav® is used?
1)During high load and lack of lubricant
between metal surfaces, the metal-fluoropolymer/fluoropolymer-metal
layers provide viscous form of lubrication and avoid metal-metal direct
touch or wear during cold start.
2)Under extreme high load,
gel-like of sponge-like surface metal-fluoropolymer layers avoid pure boundary lubrication regime
due to lubricant retained in the surface layers that shift boundary
lubrication into hydrodynamic lubrication regime, and greatly extend the lifetime
of engine surfaces, especially the friction
between piston rings and cylinder liner walls.
3) During hydrodynamic
lubrication the metal-fluoropolymer-lubricant layers change turbulent
flow to gel/laminar flow, and greatly reduce hydrodynamic frictions with
fluoropolymer-lubricant interfaces.
4) The frictions between piston rings and cylinder liner walls are
mixed lubrication regime due to unfavorable lubrication conditions. The
high temperature resistant metal-fluoropolymer layers with gel-like
surfaces layers provide sufficient lubrication even under
the condition of starvation of lubricants.
How to save gasoline consumption
by lubricant additive
FuelSav®?
The engine converts
gasoline combustion energy to mechanical energy. A part of the work done by engine is wasted by friction.
Reduction of a part of friction will save gasoline.
FuelSav®
is the lubricant additive which form sponge-like surface layer retaining
lubricant that improve lubrication especially for
piston rings and cylinder wall to reduce friction and reduce wear of
metal surfaces in rubbing contact with each other.
What are the differences before
and after the addition of lubricant additive
FuelSav® into internal
combustion engine crankcase?
The first type of lubrication is called
boundary lubrication, It usually occurs either under high load or under
insufficient lubricant because unfavorable conditions. The entire load
is carried by thin, multi-molecular layer of lubricant oil between the
surfaces. For avoid wear during boundary lubrication, the lubricant oil
must have high viscosity. The
engine oil (lubricant oil) used for four stroke or diesel engines have
low viscosity. The speed of the movements are high, metal parts under
boundary lubrication suffer accelerate wear, especially during cold
start.
After addition of lubricant
additive FuelSav®,
the lubricant soluble phosphoric functional fluoropolymers are pumped
into lubricant system by oil pump and passed through oil filter, and
contact with the metal surfaces. The phosphoric functional
fluoropolymers in the lubricant are chemically adsorbed on the metal
surfaces with chemical bonds, and phosphoric functional groups react
with metal or metal oxide to form chemical bonded fluoropolymer layers
by phosphoric-metal (iron) bonds. The chemically bonded fluoropolymer
layer are oil sponge-like layer. Original metal surfaces no longer
exist. They converted to fluoropolymer surfaces after contact with
lubricant motor oil saturated with lubricant additive
FuelSav®.
First, under high load or
insufficient lubricant because unfavorable conditions, The entire load
is now carried by solid fluoropolymers layers with retained lubricant in
rubbing fluoropolymer/fluoropolymer surfaces.
Fluoropolymer/fluoropolymer interface has very low friction even under
high load. Therefore, there is no need for lubricant oil must have high
viscosity. The boundary lubrication type lubrication no longer exist
after addition of lubricant additive
FuelSav®.
The same mechanism is algae slime grow on seashore rock making steeply
surfaces which have sponge-lake layers hold water. Water has very low
viscosity that is not a lubricant. The sponge-like surface layers by
FuelSav® change the
boundary friction regime into hydrodynamic regime and
reduce friction and wear.
The second type of lubrication
is called fluid film lubrication or hydrodynamic lubrication. The main
feature of hydrodynamic lubrication is that the surfaces are separated
by lubricant film that is considerably thicker than the surface film
formed by boundary lubricants. Friction is caused by viscous sheering of
the lubricant and is reduced to about one tenth of the value which would
be achieved by boundary lubrication. Hydrodynamic lubrication do not
contributes wear. The main factors on the formation of fluid film
lubrication are the load, the relative speed of the surfaces, the
lubricant viscosity. The energy losses are caused by viscous dissipation
and surface frictions defined by the boundary layer thickness.
After addition
FuelSav® and formation of
surface-gel-like layers, the bare metal
surfaces do not exist, and replaced by surface-gel-like fluoropolymer
layers retaining lubricant oil. First,
the friction and wear between fluoropolymer/lubricant/fluoropolymer are the
lowest known. Second, the lubricant can be select with low viscosity.
therefore, viscous sheering can be lower. This provides the energy
saving.
The lubricant base oil with lower
viscosity or thinner oils are desired under hydrodynamic lubrication condition. It has
lower viscous losses. The gel-like surface layer retaining lubricant oil
has low friction and wear. The combination of low viscosity base oil and
lubricant additive
FuelSav® provide low friction losses and
low viscous losses, and the fuel saving.
Originally, without Lubricant
additive FuelSav®, in unfavorable condition, the boundary and
hydrodynamic lubrication can exist simultaneously, and this is called
mixed lubrication. It is the exact case occurring between piston rings
and cylinder liner walls. This is the main cause for any car why the
engine become old after 50,000 miles. Because the wear make greater
clearance between piston rings and cylinder liner walls, and the cross
section of cylinder liner wall changed shape from circular to elliptic.
After addition of lubricant
additive FuelSav®, there is no mixing
regime shift to the film lubrication between
fluoropolymer/lubricant/fluoropolymer.
It explain why you save fuel
with great amount on every models of cars or trucks.

What is lubricant oil made of?
There are two sources: mineral
and synthetic. The mineral is come from some crude oil contains the
suitable branched aliphatic constituents for making a range of lubricant
oils. The residue from distillation for gasoline, diesel, and mineral
distillate is further distillated under vacuum. The range of vacuum
distillated friction is first de-asphalting by propane extraction.
It follows the solvent extraction to remove aromatics which has poor
viscosity-temperature characteristics. The urea de-waxing or other
de-waxing process to remove wax which would stop the oil flowing under
low temperature. The base lubricating oils are made by vacuum
distillation, propane de-asphalting, solvent de-aromatic extraction, and
urea de-waxing. The base lubricating oil is a mixture of hydrocarbons
having an average molecular weight ranging from 150 for light machine
lubricating oil to 1000 for a heavy gear lubricating oil.
The synthetic is synthesized by
various process depending the hydrocarbon sources. The complex of the
topic is beyond this scope.
The base oils are blended to
give the right characteristics for particular application. Lubricating
oil are rated according their viscosity, and the Society of Automotive
Engineering's (SAE) has devised a series of numerical values each of
which represents a range of viscosities. Thus an lubrication oil whose
SAE value is 30 will have a viscosity in the range 180 to 280
centistokes (cSt) at 77¡ã F (25¡ã C).
Modern lubricating oil for diesel engines and four-stroke gasoline
engines require different SAE values under different conditions, these
are called multi-grade lubricating oils. by mixed with appropriated
lubricant additives.
What is lubricant additive?
Additives are substances formulated for
improvement of the anti-friction, chemical and physical
properties of base oils, which results in enhancing the
lubricant performance and extending the equipment life.
Amount of additives are in the range of 20-30%
of base oil. Most lubricating additives
are not suitable for lubricating motor
oils for vehicle
because they are insoluble in motor oil, or having high vapor
pressure to poising catalysts in exhaust converter. All solid
lubricant additive are not suitable for motor oil because they
will be clog or block lubricating oil filters used.
Filter is designed to trap any large particles of dirt. A new
lubricating oil filter retains all particles over 15 microns in
diameter, 95% of all particles over 10 microns, and 90% of all
particles over 5 microns.
Combination of different additives and their quantities are
determined by the lubricant type (
Engine oils, Gear oils, Hydraulic oils, cutting fluids,
compressor oils, vacuum pump oils,
etc.and the specific operating conditions (temperature, loads,
machine parts materials, environment).
Friction modifiers reduce coefficient of friction, resulting in
less fuel consumption.
Crystal structure of most of friction modifiers consists of
molecular platelets (layers), which may easily slide over each
other.
Th solid lubricants are used as friction modifiers
for non motor oil applications.
Anti-wear additives prevent direct metal-to-metal contact
between the machine parts when the oil film is broken down.
Use of anti-wear additives results in longer machine life due to
higher wear and score resistance of the components.
The mechanism of anti-wear additives: the additive reacts with
the metal on the part surface and forms a film, which may slide
over the friction surface.
The following materials are used as anti-wear
additives: Zinc Dithiophosphate (ZDP), Zinc
Dialkyldithiophosphate (ZDDP), Tricresylphospate (TCP)
(banned due to neurotoxin)
Extreme pressure (EP) additives prevent seizure conditions
caused by direct metal-to-metal contact between the parts under
high loads.
The mechanism of EP additives is similar to that of anti-wear
additive: the additive substance form a coating on the part
surface. This coating protects the part surface from a direct
contact with other part, decreasing wear and scoring.
The following materials are used as extra pressure
(EP) additives: Chlorinated Parwphffines, Sulphurized Fat,
Estersm ZDDP, Molybdenum Disulfide.
Rust and Corrosion inhibitive, which form a barrier film on the
substrate surface reducing the corrosion rate rate. The
inhibitors also absorb on the metal surface forming a film
protecting the part from the attack of oxygen, water and other
chemically active substances.
The following materials are used as rust and
corrosion inhibitors: Alkaline compounds (polyamines), Organic
acids, esters, amino acid derivatives
Mineral oils react with oxygen of air forming organic acids. The
oxidation reaction products cause increase of the oil viscosity,
formation of sludge and varnish, corrosion of metallic parts and
foaming.
Anti-oxidants inhibit the oxidation process of oils.
Most of lubricants contain anti-oxidants.
The following materials are used as anti-oxidants:
Zinc dithiophosphate, alkyl sulphides, aromatic amines, hindered
phenols.
Detergents neutralize strong acids present in the lubricant (for
example sulfuric and nitric acid produced in internal combustion
engines as a result of combustion process) and remove the
neutralization products from the metal surface. Detergents also
form a film on the part surface preventing high temperature
deposition of sludge and varnish.
Detergents are commonly added to engine oills.
Phenolates, sulphonates and phosphonates of alkaline and
alkaline-earth elements, such as calcium (Ca), magnesium (Mg),
sodium (Na) or Ba (barium), are used as detergents in
lubricants.
Dispersants keep the foreign particles present in a lubricant in
a dispersed form (finely divided and uniformly dispersed
throughout the oil).
The foreign particles are sludge and varnish, dirt, products of
oxidation, water etc.
Long chain hydrocarbons succinimides, such as polyisobutylene
succinimides are used as dispersants in lubricants.
Pour point is the lowest temperature, at which the oil may flow.
Wax crystals formed in mineral oils at low temperatures reduce
their fluidity.
Pour point depressant inhibit formation and agglomeration of wax
particles keeping the lubricant fluid at low temperatures.
Co-polymers of alkyl acrylate polymers
are used as pour point depressant in lubricants.
Viscosity of oils sharply decreases at high temperatures. Low
viscosity causes decrease of the oil lubrication ability.
Viscosity index improvers keep the viscosity at acceptable
levels, which provide stable oil film even at increased
temperatures.
Viscosity improvers are widely used in multi grade oils,
viscosity of which is specified at both high and low
temperature.
Acrylate polymers are used as viscosity index improvers in
lubricants.
Agitation and aeration of a lubricating oil occurring at certain
applications ( Gear oils, Engine oils, Compressor oils) may
result in formation of air bubbles in the oil - foaming. Foaming
not only enhances oil oxidation but also decreases lubrication
effect causing oil starvation.
Dimethylsilicones (dimethylsiloxanes) is commonly used as
anti-foaming agent in lubricants.
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