ExxonMobil Grease Technology Update D.A. Slackdocshare01.docshare.tips/files/22379/223790759.pdf ·...

2006 Exxon Mobil Corporation. All Rights Reserved.

Americas FES Meeting

Miami, July 2006

ExxonMobil Grease

Technology Update

D.A. Slack

C.R. Coe

R.A. Miller

O. DuPuis


Entregar valor al cliente a través de la tecnología

• Una línea de productos fácil de entender “Una Marca – Una Cualidad”

para cumplir con los requerimientos de cada aplicación

– Simplificación de la línea global de grasas Mobil

– Estandarización de nombres de productos mas transparente

– Menor traslape de aplicaciones de productos

• Focus en la tecnología de los espesantes : lithium, lithium complex,

and polyurea

– Espesantes adicionales (clay, calcium sulfonate, etc.) empleados

a necesidad para cumplir con los requerimientos de algunos

nichos de mercado

– Aceites basicos, polímeros y aditivos completan la oferta

• Unica tecnología de fabricación XOM “Grease Pro” para producir

grasas de lithium and lithium complex (ambas mineral y sintéticas) de

alta consistencia, calidad y desempeño.

– Procedimiento por lotes para fabricación de grasas especiales y

de Poliurea


Polyurea Synthetic

Conventional Lithium

Polyurea Mineral

Li Complex Mineral

Li Complex Synthetic

Competitive

Premium

Flagship Appl Spec Products

Appl Spec Products

Global Grease Product Line Vision:

Core Technology Focus

• Polyurea Synthetic - newest step-out performance exceeding Mobilith SHCs in targeted areas

• Lithium Complex Synthetic - Mobilith SHCs, flagship synthetic technology with improved high temperature life

• Polyurea Mineral - Polyrex EM line expanded to fill gaps and complement LiX mineral family

• Li Complex Mineral - Largest family, multipurpose, rationalized cost/performance, mostly “Grease Pro” manufacturing

• Conventional Lithium - Harmonized formulations/packages/lowest COGS & complexity/”Grease Pro “or batch manfacture

• Application Specific Products - as needed to complete offer in specialty sectors (CVJ, food grade, EAL, etc.)

Thickener, Polymer, Additive Platform IS

O V

G

NLGI Grade

Appl Spec Products

Core

Technologies:

Li, LiX, PU


Product

Family Identifier Identifier

Product

Brand

Master

Brand

Mobil lith XHP Moly Extra 222

.... provides critical

information:

ISO VG = 220 & NLGI = 2

Or for semifluid grease:

first 2 digits = NLGI grade

3rd digit = AGMA grade

ISO/NLGI

Arquitectura de los nombres:

El uso de cinco celdas es una parte crítica de la nueva nomenclatura

.... provides information

on thickener technology: lith = Lithium Complex

Polyrex = Polyurea

Centaur = Calcium Sulfonate

temp = Clay

lux = Lithium

grease = Niche FS & Prem

...identifies

brand architecture:

SHC = F.S.

XHP = Prem

Note: misc competitive = Greasrex


Grease Basics

Ventajas

• Permanecen adheridas, reducen pérdidas

• Sellan contra contaminantes

• Usadas donde la relubricación es dificil

Desventajas

• Compatibilidad entre grasas

• Bajas propiedades de disipación de calor

• Manufactura compleja

Improve Performance

Provides Structure

Provides Lubrication Propósito

Physical Chemical

Soap (e.g.,

lithium)

Non-Soap (e.g.,

polyurea, clay)

Synthetic Mineral Tipos

Aditivos Espesante Aceite Base

Grease = Basestock + Thickener + Additives


• Propiedades de desempeño afectadas por el tipo de espesante

– Punto de Goteo - lithium complex, polyurea and clay tienen altos puntos de goteo

– Estabilidad de la composición - lithium complex and simple lithium tienen excelente estabilidad mecánica

– Resistencia al agua - calcium sulfonate, lithium complex, polyurea and simple lithium todas tienen buena resistencia al agua

– Bombeabilidad - lithium, lithium complex and polyurea todas tienen buena bombeabilidad

• Factores de la aplicación que afectan la elección del espesante

– Frecuencia de relubricación - polyurea excelente para llenado de por vida

– OEM requirements – Especificados por el fabricante

– Compatibilidad – Debe ser evaluada caso por caso

Notar que muchas de estas propiedades también son influenciadas

por los aceites base y los aditivos

Consideraciones del espesante al escoger grasa


¿Por qué actualizar a una grasa sintética?

• Las grasas sintéticas tienen grandes características para resolver

problemas, aumentar la rentabilidad y el ahorro de dinero

• La grasa sintética correctamente escogida puede proveer:

– Mejorar los indicadores de viscosidad y la lubricación EHL

(Elasto-hidrodinámica) así como el espesor de película.

– Larga vida a altas temperaturas

– Extraordinario desempeño a baja temperatura

– Alto desempeño y mayor biodegradabilidad

– Resduce los costos y la complejidad del mantenimiento

• Menos productos necesarios en campo

• Eliminación de la rotación estacional de productos para

operaciones a la interperie.


Mineral

Synthetic

Natural

Exotic

Polyalphaolefin (PAO)

Ester

Polyglycol

Alkylbenzenes

Paraffinic

Naphthenic

Una grasa no puede ser mejor que su aceite base

Vegetable Oils

Silicones, Fluorinated Fluids

Aceites base

• Rango de viscosidad de aceites base entre 10 y 1500 cSt


Tipos de aditivos y funciones

Functions Purpose Additive Type

Chemical reaction with metal surface to form film with lower shear strength than the metal, thereby preventing metal to metal contact

Reduce friccion y desgaste

Previene el picado Antiwear & EP Agent

Preferential adsorption of polar constituent on metal surface to provide protective film of neutralize corrosive acids

Previene la corroción y herrumbre en las piezas en contacto con la grasa

Corrosion & Rust

Inhibitor

Oil soluble polymers increase base oil viscosity Aumenta la visc. del aceite Viscosity Modifier

Decompose peroxides and terminate free radical reactions

Retarda la descomposición por oxidación Antioxidant

Form inactive film on metal surfaces by complexing with metallic ions

Reduce los efectos catalítico de metales en la oxidación Metal Deactivator

Polymers increase cohesive and adhesive properties of grease

Aumenta la adhesión y resistencia al agua Structure Modifier


Balance of Properties

Additive Performance

Consistency

Extreme-Pressure

Anti-Wear

Low Temperature

Pumpability

Compatibility

Mechanical

Stability /

Oil Release

Corrosion

Protection

High Temperature

Water Resistance


Métodos XOM de fabricación de grasas

• Por lotes: Contactor/Kettle or Open Kettle - slow, labor intensive

• Continua: Grease Pro – máxima eficiencia

• Ventajas Grease Pro

• Alta calidad y desempeño de producto

• Textura mas suave y apariencia mas uniforme

• Mas uniformidad en la dispersión en el espesante

• Mas limpia

• Mayor uniformidad en el tamaño de los poros resultando en mejor

eficiencia al liberar el aceite

Lithium Grease Fibers at 35,000X

1 micron Batch Grease Pro


Grease Manufacturing Process Comparison

Grease - Pro


Mobilgrease XHP

222

Mobilith AW Series

Mobilux EP Series

Mobilith SHC

Beacon EP Series

AS-IS

TO-BE Greases – General Industrial

COMPETITIVE

PREMIUM

FLAGSHIP

Lithium Core Product Offer • Eliminate Mobilith AW and

convert to Mobilgrease XHP or Mobilux EP

• Eliminate Beacon EP – De-harmonization

Unirex EP 2 TBD

E

E

Mobilith SHC PM 220

Mobilith SHC 460

Mobilith SHC 100

Mobilith SHC 221

Mobilith SHC PM 460

Mobilith SHC 1500

ML SHC 1000 Special

MG XHP 221

MG XHP 005

MG XHP 220

MG XHP 461 / 462

MG XHP 222

MG XHP 222 Special

Mlith AW 00

Mlith AW 0

XHP 221

XHP 222

Current Product

XHP 222 Special

Ronex ED 1 / 2

Mobilux EP 1

Mobilux EP 023

Mobilux EP 0

Mobilux EP 2

No Change

No Change

Mobilith SHC 220

Mobilux EP 3

Mobilux EP 004

Mobilux EP 2 Moly

MG = Mobilgrease

ML = Mobilith

MG XHP 223 XHP 223

Grease

Color


Mobilith SHC Series :

Flagship Synthetic Hydrocarbon Greases

• Unique lithium complex soap is an ExxonMobil core

thickener technology

• Synthetic hydrocarbon base oils provide superior

performance over a wide temperature range

• Range of grades and base oil viscosity to span wide

spectrum of application requirements

• Recent formulation enhancements upgrade performance

– new zinc-based additive system improves water

resistance and provides more effective corrosion

protection

• Mobilith SHC greases are manufactured at Beaumont using

“Grease Pro” technology for consistent quality and

performance


Water Washout Performance of New Mobilith

SHC Mobilith SHC PM (dyed red)

Mobilith SHC PM 460


(Performance of Mobilith SHC PM 460

vs. Current Mobilith SHC PM)

0

1

2

3

4

5

6

7

8

9

10

Wet Churn Temperature

Wet Churn Penetration Change

Water Wash Out

Roll Stability

Water Resistance

EMCOR

Alkali EMCOR

Condition of Grease in Pillow Block after Alkali

EMCOR

Mobilith SHC PM 460 Current SHC PM


(Mobilith SHC PM Series)

New Mobilith SHC PM

seriesCurrent Mobilith SHC

PM

Performance of New

Version vs. Current

Mobilith SHC PM

Formulation

Base Oil Type Synthetic Synthetic

Formulation Description Zinc-Based Zinc Free

Thickener Lithium Complex Lithium Complex

Inspection

Color Light Tan Light Tan

MOV at 40°C AM-S 1697 220 or 460 cSt 460 cSt

60X Penetration D217 311 290 - 320

Dropping Point D2265 275 246

Mechanical / Structural =100KX Penetration D217 344 334 =CGOR wt% Bleed AM-S 1066 3.5 4.5 =CGOR 1/2 Scale Pen AM-S 1066 -7 +15 =Roll Stability D1831 +6 +13 +Oil Bleed D1742 2.6 2.19 =

Water Resistance ++Water Washout @ 79°C D1264 1.0% 10.0% ++Water Resistance DIN 51807 0 >2 ++

Rust/Corrosion +EMCOR DI Water D6138 0-0 0-0 =EMCOR Acid Water pH 4.5 D6138 0-0 1-2 +EMCOR Alkaline Water pH 12.0 D6138 0-0 0-0 =Grease Appearance after Test visual OK emulsified +Cu Corrosion D4048 1A 1B +

EP/AW +Timken D2509 65# pass 45# pass ++4 ball EP Weld Load D2596 250 250 =4 ball EP LWI D2596 53.1 55 =4 ball wear D2266 0.48 0.5 =


Mobilgrease XHP Series :

Premium Greases for Industrial / Automotive

• Lithium-complex thickener for an extended operating

temperature range

• Formulated with high-quality mineral base stock

• Special selected polymer chemistry enhances

adhesion, water resistance, and stability

– functional polymer has synergistic interaction with

proprietary lithium complex thickener

• Recent additive chemistry upgrades further enhance

corrosion protection

• Manufactured worldwide to global standard using

“Grease Pro” technology

– wide availability and consistent quality

• Will eventually become “Mobilith XHP” in keeping with

naming conventions


Roll Stability (ASTM D1831) C

am

bio

en

la p

en

etr

ació

n

Mobilgrease XHP 222

Comp 1 Comp 2 Comp 3 Comp 4 Comp 5

28

20

16

18

12

2

0

5

10

15

20

25

30

Note: all are NLGI 2, base oil viscosity 180 to 220 cSt @ 40°C

Mobilgrease XHP 222 Competitive Comparisons

Me

jor


Comp 1 Comp 2 Comp 3 Comp 4 Comp 5 Mobilgrease XHP 222

% e

n p

eso

de p

érd

ida d

e g

rasa

3.634.00

4.23

8.318.00

7.00

3.10

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

Mobilith AW 2

Me

jor


Lavado por agua (ASTM D 1264) – Indicador de la resistencia al agua

All are NLGI #2, Base Oil Vis 180 to 220 cSt @ 40°C



30.5% 44.4% 45.3% 18.8% 47.4% 12.1%


El menor, el mejor!

50.0%

Mobilith AW 2

Water Spray-off (ASTM D 4049) – Indicador de resistencia al agua

All are NLGI #2, Base Oil Vis 180 to 220 cSt @ 40°C



Cono de goteo (ASTM D 6184)

% e

n p

eso

de g

ote

o d

e a

ceit

e


4.43

1.86

1.54

1.97

4.35

2.78

1.56

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Me

jor

Mobilith AW 2


Mobilux EP Series :

Competitive Lithium Greases for Industrial

and Automotive Use

• Espesante simple de hidroesterato de litio es nuestro espesante

para las grasas competitivas

• Mobilux EP es formulada con aceites base minerales

• El paquete global de aditivos provee a la Mobilux EP aditivos

antidesgaste, anti errumbre, anticorroción y antioxidantes

– Desaparecerá la grasa Esso Beacon EP

• Para aplicaciones de baja severidad

• Fabricada a nivel mundial por lotes o por el sistema “Grease

Pro”


• Pobre estabilidad mecánica

• Incompatibilidad con otras grasas

• Pobre estabilidad en el almacenamiento (separación de aceite)

• Poca protección antiherrumbre

• Alto costo

• Dificultad en su fabricación

• Poca bombeabilidad en sistemas centralizados

Tambien viene…

Polyurea Greases


Polyrex EM Series :

Premium Greases for Electric Motor Applications

• Proprietary ExxonMobil diurea thickener is a core EMC thickener

technology providing outstanding high temperature performance

– EMC thickener is inherently oxidatively stable, is an efficient

thickener, and exhibits excellent shear stability

• Formulated with premium quality paraffinic base stock

• Exclusively manufactured at Olathe using EMC-patented process

– special manufacturing method developed to produce a low-noise

grease performance

• Polyrex EM 103 for higher speed / vertically mounted applications

recently developed in response to OEM interest

• Bearing grease of choice for electric motor OEMs specifying

polyurea bearing grease

– Unirex N remains available for use where lithium electric motor

greases still specified by some OEMs


ASTM D3336 Grease Life at 177 °C (350 °F)

Mobil

Polyrex EM

Competitor C Conventional

Polyurea

Conventional Li-Complex

0

100

200

300

400

500

600

700

800

900

Lif

e (

L50 in

ho

urs

)

1 2 3


FAG FE9 Grease Life (Variation A)

Mobil

Polyrex EM


Polyurea


100

110

120

130

140

150

160

Tem

pera

ture

(°C

) t

o o

bta

in

100 h

r m

inim

um

Lif

e (

L50)

1 2 3


0

10

20

30

40

50

60

70

80

90

100

100K

X -

60X

Pen

etr

ati

on

, m

m/1

0

1 2 3

Shear Stability Based on 100K Penetration

Polyrex EM


Polyurea



Oil Separation Performance

0

5

10

15

20

25

30

35

0 20 40 60 80 100 120 140 160 180

Time (hours)

Oil S

ep

ara

tio

n (

%)

Polyrex EM @ 120°C

Competitor C @ 120°C

Polyrex EM @ 150°C


Polyrex EM @ 70°C


120°C

120°C

150°C

150°C

IP 121 OIL SEPARATION @ 70°C, 120°C and 150°C

70°C

70°C


Compatibilidad de Grasas

Concepto General

• Dos grasas son compatibles si estas se pueden mezclar (como en la

aplicación) y su consistencia está dentro del grado NLGI (30-45

mm/10) or menos de la grasa inicial

Cuidado!

• Cuando no exista compatibilidad de grasas, la grasa original debe

ser completamente removida del equipo


Method

• The two fresh products are mixed at designated ratios

(Wt.%)

• Penetrations are performed on all mixtures before and

after two hours of roll shearing (ASTM D 1831) at ambient

temperature (20-35°C).

• Penetrations are compared graphically

Compatibilidad de Grasas Cont.

Roll Shearing

• 5Kg rollers


Example of two incompatible greases

Compatibilidad de Grasas Cont.

200

250

300

350

400

450

NLGI 2

NLGI 1

NLGI 0

NLGI 00

Dh

100%/0% 75%/25% 50%/50% 25%/75% 0%/100%

Muestra X/Y

Pe

ne

tra

ció

n t

rab

aja

da

, m

m/1

0

2hr Roll


Mobil Polyrex EM Compatibility with Unirex N2

200

220

240

260

280

300

320

340

100/0 50/50 0/100

1/2

SC

AL

E W

OR

KE

D P

EN

ET

RA

TIO

N, m

m/1

0

2 Hour Roll

60X

Polyrex EM / Unirex N2

D = 35


Compatibility of Competitor C with Unirex N2

200

250

300

350

400

450

100/0 50/50 0/100

1/2

SC

AL

E W

OR

KE

D P

EN

ET

RA

TIO

N, m

m/1

0

2 Hour Roll

60X

Competitor C Polyurea / Unirex N2

429

D = 84


Mobil Polyrex EM Compatibility with Competitor C

200

250

300

350

400

450

100/0 50/50 0/100

1/2

SC

AL

E W

OR

KE

D P

EN

ET

RA

TIO

N, m

m/1

0

2 Hour Roll

60X

Polyrex EM / Competitor C Polyurea

D = 13


Mobil Polyrex EM Compatibility*

Product

Oil Type

Thickener

Type

Exxon Unirex N Mineral Li- Complex

Mobilgrease XHP Mineral Li-Complex

Mobilith SHC 100 PAO Li-Complex

Mobilith SHC PM PAO Li-Complex

* Based on Roll Stability Testing


(Specialty Synthetic Industrial Greases for

Temperature Extremes)

• Beacon 325 (Mobil brand name TBD)

– simple lithium 13 cSt diester grease for low temperature

applications down to -54°C

• Mobiltemp SHC 32

– clay-thickened grease with synthetic hydrocarbon base stock

– excellent low temperature grease (-54°C lower operating

temperature)

• Unirex S2 (to be Mobilgrease SHC 170)

– lithium complex grease with 170 cSt polyol ester base stock

– proprietary additive system for this ester

– high temperature grease to 160°C +

• Unirex PF 500 (to be Mobilgrease SHC 500 PF)

– PTFE thickened PFPE for high temperature bearing applications

at 200°C+


Food Grade and EAL Specialty Greases

• Mobilgrease FM 221 and 222 food grade greases are USDA H1,

Kosher, and Pareve certified

– aluminum complex thickener and white oil

– batch manufactured in a dedicated food-grade assets to

ensure maintenance of all certifications

• Mobilgrease EAL 101 and 102 are lithium greases based on

synthetic ester technology

– products are biodegradable with low ecotoxicity

– will be updated in late 2006 to a lithium complex thickener

formulation with enhanced water resistance

– new names will be Mobilgrease SHC 101 / 102 EAL


Mobilgrease CM

Series

Delvac Xtreme

Service Grease

AS-IS TO-BE

Greases – General CVL

COMPETITIVE

PREMIUM

FLAGSHIP

• Rename Moly 50 greases to Mobilgrease XHP convention

• Convert Ronex ED to XHP platform or Ronex AW

Mobilgrease

Moly 50 Series

Ronex ED Series

E

E

E

Xtreme Grs / CM-S

CM-P

CM-W

CM-L MD Xtreme GR LT Moly

MD Xtreme GR LT

MD Xtreme GR

MD Xtreme GR Moly

Current Product Special = 0.75% Moly

Moly = 3% Moly

Mine = 5% Moly

Ronex ED 1 & 2

Ronex ED 2 Moly

MG XHP 461 / 462

MG XHP 462 Moly

Moly 52

Moly 51

Moly 50

Moly 50 Arctic MG XHP 100 Mine

MG XHP 320 Mine

MG XHP 322 Mine

MG XHP 321 Mine

Ronex AW 221

Ronex AW 222

Ronex AW 222 Moly

MG = Mobilgrease

MD = Mobil Delvac

GR = Grease

MG XHP 681 Mine Mine Grease 681

Mobilgrease

Special Mobilgrease Special No Change

Lithium Core Product Offer

Grease

Color


Serie Delvac Xtreme Grease:

Premium Greases para aplicaciones en carretera

• Lithium-complex premium XOM core thickener technology

– Grasas grado-moly tendrán pigmento rojo

– Grasas grado-moly tendrán 3% molybdenum disulfide

– Rango de productos para satisfacer la demanda del

segmento transporte en carretera y construcción

• Formulated with high quality mineral base stocks

• Special selected polymer chemistry enhances adhesion and

water resistance


proprietary lithium complex thickener

• Enhanced corrosion additive system

• Manufactured using “Grease Pro” production process


0

1

2

3

4

5

6

7

8

9

10

Structural Stability Corrosion Resistance Low Temperature

Castrol Pyroplex Blue

Chevron Delo EP 2

Mobil Delvac Xtreme

GreaseCastrol PyroplexProtection ES

Shell Retinax LC 2

Balanced Performance

Mobil Delvac Xtreme Grease

Mobil

Delv

ac X

trem

e G

rease

Mobil

Delv

ac X

trem

e G

rease

Mobil

Delv

ac X

trem

e G

rease

600 cSt base oil

189 cSt

320 cSt

220 cSt

320 cSt

Note: all are NLGI

2 Lithium Complex

Relative Performance

(Higher is Better)


Mobilgrease XHP Mine Series :

Premium Greases for Off-Road and Mining

Applications

• Mobilgrease XHP Mine greases están construidas sobre la

misma plataforma tecnológica de alto desempeño de las grasas

MG XHP and Delvac Xtreme

– advanced lithium complex thickener

– high quality mineral base stocks


proprietary lithium complex thickener to enhance adhesion

and water resistance

– enhanced corrosion protection

• The Mobilgrease XHP Mine series greases all contain 5% moly

– meets Caterpillar off-road requirements


Balanced Performance

Upgraded Mobilgrease Moly 52 Vs Current

Mobilgrease Moly 52

0

10

20

30

40

50

60

70

Current Mobilgrease Moly 52 Upgraded Mobilgrease Moly 52

Improved Improved Mejorado Slightly

poorer

Un poco

menor

We

t 10

0K

X P

en

Delt

a, m

m/1

0

Wa

ter

Sp

ray-o

ff,

wt%

Flin

g-o

ff,

wt%

Mo

bilit

y @

-1

0C

,

gra

ms

/min

Mo

bilit

y @

-2

0C

,

gra

ms

/min


(Ronex AW 220 Series)

• Competitive lithium complex formulation intended for less

severe applications

– formulation does not offer the superior adhesion and water

resistance of the polymer-enhance XHP Series

• Formulation features do include

– high quality mineral base stock

– EP / AW protection

– corrosion inhibitors

• Will be available in NLGI #1, NLGI #2, and NLGI #2 Moly grades


(Centaur Moly :

Calcium Sulfonate Greases for On-Road)

• Calcium sulfonate thickener provides high temperature

capability and inherent extreme pressure performance

• Sulfonate chemistry also provides excellent anti-corrosion

performance in difficult applications

• Centaur greases are mineral oil base formulations

• Tackiness and water resistance are enhanced by application of

selected polymers

• Available in NLGI #1 and #2 grades containing 3.0% moly

• Centaur Moly greases are manufactured in Olathe using batch

processing methods


(Calcium Sulfonate vs Lithium Complex

Grease Comparison) ExxonMobil Grease Comparison

0

1

2

3

4

5

6

7

8

9

10

Structural Stability

Wet Structural Stability

Low Temperature

Wear Protection

Extreme Pressure

Corrosion Resistance

Mobil Centaur Moly 2

Mobil Delvac Xtreme Service Grease


¿Como determinar los límites de alta temperatura?

• La industria ha usado un rango de criterios para determinar los límites

de alta temperatura:

– Recomendaciones basadas en los niveles del punto de goteo

– Estándares de los fabricantes de equipos obtenidos de pruebas

• ExxonMobil ha optado por basar sus recomendaciones en el test de

rodamientos FE9 usadas en la clasificación de desempeño para grasas

Europea DIN / ISO

– Pope and R0F data puede ser usada para desarrollar

recomendaciones en aplicaciones específicas

• More conservative temperature guidance does not reflect a change in

product performance

• Recomendaciones deben ser probadas contra el régimen de

lubricación EHL


(FAG FE 9 – High Speed Angular Contact Ball

Bearing (DIN 51821)) Purpose

• Measure the friction properties of grease.

Description

• 5 ball bearings are packed with 2 cc of grease

• Ball bearings are placed in angular contact at high temperature (120- 200°C), speed (3000 or 6000 rpm), and load (1500, 3000, or 4500 N axial)

• Test is ended when the drive power required to turn the bearing increases to twice its original value because of starved lubrication

• Then possible to determine the frictional moment of the test bearing from the increase in motor output

Results

• The time at which the bearings have a failure probability of 10% and 50% (denoted L10 and L50) are calculated from the data


204 K Ball Bearing

(POPE Test (ASTM D 3336))

Purpose

• Evaluate grease evaporation and oxidation resistance in a lightly loaded, high speed, heated ball bearing. Test is named for the builder of the high speed spindle, Pope Spindle Co.

Description

• 204 K ball bearing is packed with 3.2 cc of grease

• Rotated at 10,000 rpm under light load while heated to 150°C, 177°C, or other test temperature

• Test cycle is twenty hours of running and four hours at rest

• When electrical current to operate the spindle motor increases by 300% of the value of the newly packed bearing, testing is stopped

Results

• The number of running hours is the test result


Influencias del criterio de selección en el

desempeño a altas temperaturas

• Historicamente el desempeño a altas temperaturas estaba

basado en el punto de goteo

– Regla práctica: Fijar la máxima temperatura de trabajo a

100°F (55°C) menos que el punto de goteo

• Los ensayos en rodamiento están diseñados para exigir a la

grasa en condiciones mas reales para emular mejor los modos

reales de falla :

– Degradación mecánica u oxidación del espesante

– Evaporación del aceite base y oxidación

– Secado de la grasa por separación de aceite

• Los rangos de temperatura fijados con ensayos en rodamientos,

no son tan amplios como los obtenidos en función al punto de

goteo


Typical Maximum Operating Temperatures

for Core ExxonMobil Greases

Product Old Max Operating

Temp (1)

Current Max

Operating Temp (2)

Current Critical Temp

Limit (3)

MG XHP Family 177°C (350°F) 140°C (285°F) 160°C (320°F)

Mobilith SHC Series 190°C (375°F) 150°C (300°F) 170°C (340°F)

Polyrex EM Series „- 170°C (355°F) 190°C (375°F)

(1) Estimated from dropping point “rule of thumb”

(2) Based on L50 bearing life of 100 hours in FE9 bearing test

(3) Estimated maximum short-term temperature excursion limit


Basis for Competitor High Temperature

Usage Guidance is Variable

Supplier Brand Max Temp Basis for Guidance

Total Altvis MV2 160°C DIN Class‟n (FE9 >100h @

160°C)

Conoco Polytac EP2 204°C Dropping Point minus 55°C

Texaco Polystar RB and

RB Synthetic

204°C Dropping Point minus 55°C

Chevron SRI 177°C D3336 Life of 600 hrs @ 177°C

Shell Stamina RLS 177°C Continuous

204°C Short Term

D3336 of 435 hrs at 177°C

FE9 of 191 hrs @ 150°C

Example : Competitive Polyurea Greases


(¿Como se determina el desempeño a bajas

temperaturas?)

• There are a number of aspects of low temperature performance

that may be considered in determination of low temperature

limits for a given application

• Low temperature bearing torque

– industrial ball bearing criteria generally based on ASTM

D1478 (or similar) tests

– industry automotive roller bearing by ASTM D 4693

• Dispensing equipment limitations related to slumping behavior,

pressure drop in delivery lines, or metering device

considerations

– ASTM D 1092 / USS Mobility and Lincoln Ventmeter tests

commonly used to develop system-specific guidance

• OEM guidelines for larger bearings based on EHL / lubricity may

be even more conservative (based on bearing wear tests)


Photos depict test ball

bearing and test rig.

(Low Temperature Torque of Ball Bearings

(ASTM D 1478)) Purpose

• Evaluate the extent to which a grease retards rotation of a slow speed ball bearing at low temperatures

Description

• Single No. 6204 open ball bearing is packed with grease and cooled to test temperature

• Bearing is rotated at 1 rpm to measure the starting and running torque, indications of grease‟s consistency at test temperature

• Helpful in selection of greases for low powered mechanisms such as instrument bearings

Results

• Report starting and running torques in g • cm


Minimum Operating Temperatures for

Selected ExxonMobil Greases

• Guidelines based on Low Temperature Torque (ASTM D1478)

– max 10000 gcm Start / 1000 gcm Run standard is consistent with

DIN (Deutsch Institut für Normung) classification and available OEM

guidance Product Minimum Operating

Temperature (1)

Polyrex EM -30°C

Mobilith SHC

220

-40°C

Mobilith SHC

100

-50°C

Mobiltemp SHC

32

-54°C

Beacon 325 -54°C


US Steel Mobility (USS Method)

Purpose

• Determine grease flow properties at -18°C

Description

• Flow rate in grams per minute is determined

• Lubricating grease cooled to -18°C is forced

through largest capillary used in ASTM

D1092 Apparent Viscosity Test - ASTM

D1092 grease cylinder and piston are used

• Grease flow can also be determined at other

temperatures

• Base oil viscosity has a large effect on grease

flow

Results

• Results are reported in grams/minute



US Steel Mobility (USS Method) F

low

Rate

, g

ram

s /

min

ute


53.0

83.5

43.4

27.8

31.8

55.1

47.3

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

Be

tte

r

Mobilith AW 2


Piston

Hydraulic

pressure

Apparent Viscosity (ASTM D 1092) Purpose

• Determine the apparent viscosity of a grease. Apparent viscosity versus shear rate information can be useful in predicting pressure drops in grease distribution systems

Description

• Sample of grease is forced through a series of 8 capillary tubes by a floating piston actuated by the hydraulic system

• Pressure in the hydraulic system is measured

• Equipment designed so determinations can be made at any temperature between -54°C and 28°C

Results

Results (in Poises) are shown graphically

• Apparent viscosity vs. shear rate at a constant temperature

• Apparent viscosity vs. temperature at a constant shear rate


• The pressure data is plotted to show the apparent viscosity as Poise vs shear rate

• The shear rate is the force delivered by the combination of piston speeds and capillaries which are sixteen

different shear rates.

• This data can also be plotted to give pressure drop, pump size and other grease handling details when the

NLGI Steady Flow Charts are used

Low Temperature Flow


Nomograph Developed from Apparent

Viscosity Data

PUMPABILITY OF MOBILGREASE XHP 222

0.1

1

10

100

1000

0.01 0.1 1 10

DELIVERY RATE, lb/min

DELTA P,

psi/ft

0C

+10C

+24 C

PIPE ID, INCHES = 0.5


QUESTIONS ??


Back-Up Slides


Greases for High Temperature Applications

• Mobiltemp - Specialty Grease Technology

– organo-clay based thickener provides high temperature

performance

– high-viscosity mineral base stocks to meet EHL

requirements in heavily loaded applications

– manufactured by batch process in several locations world

wide

• Polyrex EP – Core Grease Technology

– diurea thickener system used in Polyrex EM greases

– passive extreme pressure additive chemistry

– base oil properties are enhanced with soluble polymer to

provide tackiness and water resistance

• Mobilgrease HT Series – Core Grease Technology for steel mill

applications


AS-IS TO-BE

Greases – General PVL

COMPETITIVE

PREMIUM

FLAGSHIP

Ronex MP Ronex MP

Mobil 1 Synthetic

Grease No Change

Mobil 1 Synthetic

Grease

No Change

Infinitec 152 No Change Infinitec 152

Esso MP

Mobilgrease MP

No Change Esso MP

Mobilgrease MP No Change

or

Grease Core Product Offer

Vs Current

Product Grease

Color


PVL Greases

• Mobil 1 Synthetic Grease

– the automotive grease member of the flagship Mobilith SHC

technology family

• Mobil Infinitec 152

– patented lithium complex chemistry developed to meet the

requirements of automotive hub units and wheel bearings

• Ronex MP

– premium lithium complex grease with mineral oil base stock

– OEM and aftermarket automotive applications

• Esso MP and Mobilgrease MP offer competitive simple lithium

grease for less severe applications

• Exxon CVJ Grease is specifically designed for constant velocity

joint applications

– rheological properties of the polyurea thickener are tuned to

suit the application


Coupling Greases

• Mobilgrease XTC satisfies AGMA CG-1 and CG-2 requirements

– lithium soap grease thickener with high-quality paraffinic

mineral oil base stock

– formulation employs specially selected blend of polymers to

adjust base stock viscometrics and density in order to

achieve the desired centrifugal separation characteristics

• Mobilux EP 111

– lithium soap grease for use in lower speed applications

– meets AGMA CG-1 and CG-3 requirements


In the test apparatus photo, the lever arm is

connected to the bearing hub and depresses

the load measuring device located below the

floor of the tester.

Low Temperature Torque of Wheel Bearings

(ASTM D 4693) Purpose

• Measure a lubricating grease‟s effect on tapered roller bearing rotation resistance when subjected to low temperatures

Description

• Two tapered roller bearings are packed with grease and then cooled to the test temperature

• Bearings are rotated at 1 rpm to measure the starting and running torque

• Starting and running torques are indications of the grease‟s consistency at test temperature

• Test correlates with the performance of greases in automotive wheel bearings in low temperature service

Results

• Report starting and running torques in N • m


Lincoln Ventmeter (Lincoln Method)

Purpose

• Evaluate the performance of lubricating greases in a centralized lubrication system

Description

• Measures the degree to which grease will flow due to residual pressure and temperature

• Apparatus charged with test grease by way of a hydraulic grease fitting

• All air is expelled in the charging process and additional lubricant is pumped in to develop a pressure of 1800 psi

• The test is typically conducted at 25°C (77°F), 0°C (32°F) and -18°C (0°F)

Results

• Vent pressure is recorded when Valve 1 is opened for 30 seconds


Future Research Plans

(Not for External Release)


2006+ Grease TIP Projects

• Next generation, synthetic polyurea greases with improved high

temperature life for both industrial and automotive applications

• Novel approaches to manufacture of polyurea greases

• Beginning work toward next generation Mobilith SHC‟s and

Mobilgrease XHP‟s improved life and high temperature

performance

– focus on both thickener and basestock related improvements

in cost and performance

• Developing test rig and methodology to evaluate grease

performance in high DmN applications

• Support for “debunking” of competitive claims in key market

segments

ExxonMobil Use Only


CVL Competitive Survey – Castrol Pyroplex

Protection ES

• “Castrol Pyroplex Protection ES is a synthetic, lithium complex grease”

• ExxonMobil lab testing shows GRP II base oil and 80% calcium thickener

• Castrol PDS lists ISO 320 extracted base oil viscosity at 40C. Our lab extraction finds 135cSt base oil. (Castrol may be including polymer contribution?)

• “The grease prevented bearing corrosion…in a concentrated sodium chloride solution non-standard increased severity Emcor Test”

• ExxonMobil testing using standard D6138 method with 3% NaCl yielded 3,2 results

• “The “stay-in-place” ability combined with mobility and high-pressure performance”

• Castrol PDS claims 12 g/min USS Mobility. Our laboratory data shows .98g/min, which is expected for a grease having 28% thickener.

05-48774 – Castrol Pyroplex Protection ES

Bearing Rating 3 – 3% NaCl Emcor

ExxonMobil Use Only

ExxonMobil Grease Technology Update D.A. Slackdocshare01.docshare.tips/files/22379/223790759.pdf ·...

Documents

Transcript of ExxonMobil Grease Technology Update D.A. Slackdocshare01.docshare.tips/files/22379/223790759.pdf ·...