scholarly journals HAXPES Study on the Chemical States of Reaction Films Formed on Metal Surfaces by Zinc Dialkyl Dithiophosphate

2018 ◽  
Vol 16 (0) ◽  
pp. 396-399
Author(s):  
Yoshimu Iwanami ◽  
Teruo Suzuki ◽  
Kazuo Tagawa ◽  
Satoshi Yasuno
Keyword(s):  
Metal Surfaces ◽  
Zinc Dialkyl Dithiophosphate ◽  
Chemical States ◽  
Dialkyl Dithiophosphate

Effect of alkylated diphenylamine on thermal-oxidative degradation behavior of poly-α-olefin

2015 ◽  
Vol 69 (7) ◽  
Author(s):  
Mian-Ran Chao ◽  
Wei-Min Li ◽  
Li-Li Zhu ◽  
Hai-Hong Ma ◽  
Xiao-Bo Wang
Keyword(s):  
Activation Energy ◽  
Oxidative Stability ◽  
Oxidative Degradation ◽  
Thermal Oxidative Degradation ◽  
Degradation Behavior ◽  
Thermal Oxidative Stability ◽  
Zinc Dialkyl Dithiophosphate ◽  
Dialkyl Dithiophosphate

AbstractAn oil-soluble antioxidant, alkylated diphenylamine (ADPA), was prepared by alkylation of diphenylamine. The influence of ADPA on the thermal-oxidative stability of poly-α-olefin (PAO8) was evaluated by thermogravimetry (TG). For comparison, the thermal-oxidative stability of PAO8 with zinc dialkyl dithiophosphate (ZDDP) was also investigated. Activation energy (E

Synergistic Antiwear Effects of Zinc Dialkyl Dithiophosphate and Different Detergents

2008 ◽  
Author(s):  
G. Pennecot ◽  
K. Komvopoulos ◽  
E. S. Yamaguchi
Keyword(s):  
Wear Rate ◽  
Boundary Lubrication ◽  
Base Oil ◽  
Temperature Range ◽  
Zinc Dialkyl Dithiophosphate ◽  
Contact Voltage ◽  
Lubrication Regime ◽  
Steel Surfaces ◽  
Dialkyl Dithiophosphate ◽  
Insight Into

The effectiveness of blends consisting of base oil, some secondary zinc dialkyl dithiophosphate (ZDDP), and different detergents to form antiwear tribofilms on steel surfaces sliding in the boundary lubrication regime was investigated in the temperature range of 105–125°C. The efficacy of the tribofilms formed from these blends was evaluated in terms of contact voltage and wear rate measurements. The best antiwear performance was demonstrated by the tribofilm formed from the blend containing sulphonate detergent. The results of this study provide insight into competing effects between ZDDP and different detergents that affect significantly the antiwear performance of the formed tribofilms.

Zinc-dialkyl-dithiophosphate antiwear films: dependence on contact pressure and sliding speed

Wear ◽  
2005 ◽  
Vol 258 (5-6) ◽  
pp. 789-799 ◽  
Author(s):  
Hongbing Ji ◽  
Mark A. Nicholls ◽  
Peter R. Norton ◽  
Masoud Kasrai ◽  
T. Weston Capehart ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Sliding Speed ◽  
Antiwear Films ◽  
Zinc Dialkyl Dithiophosphate ◽  
Dialkyl Dithiophosphate

Role of zinc dialkyl dithiophosphate in carbon black induced abrasive wear

Wear ◽  
2017 ◽  
Vol 376-377 ◽  
pp. 771-776 ◽  
Author(s):  
Alan M. Schilowitz ◽  
Andrew R. Konicek
Keyword(s):  
Carbon Black ◽  
Abrasive Wear ◽  
Zinc Dialkyl Dithiophosphate ◽  
Dialkyl Dithiophosphate

scholarly journals Experimental observation of zinc dialkyl dithiophosphate (ZDDP)-induced iron sulphide formation

2017 ◽  
Vol 414 ◽  
pp. 41-51 ◽  
Author(s):  
Siavash Soltanahmadi ◽  
Ardian Morina ◽  
Marcel C.P. van Eijk ◽  
Ileana Nedelcu ◽  
Anne Neville
Keyword(s):  
Experimental Observation ◽  
Iron Sulphide ◽  
Zinc Dialkyl Dithiophosphate ◽  
Dialkyl Dithiophosphate

FORMULATION OF REFINED, BLEACHED AND DEODORISED PALM STEARIN WITH ZINC DIALKYL-DITHIOPHOSPHATE ADDITIVE AND ITS TRIBOLOGICAL PERFORMANCE

2016 ◽  
Vol 78 (9-2) ◽  
Author(s):  
Nurul Farhanah Azman ◽  
Syahrullail Samion ◽  
Erween Abd Rahim
Keyword(s):  
Friction And Wear ◽  
Palm Stearin ◽  
Optical Microscope ◽  
Friction Reduction ◽  
Wear Performance ◽  
Environmental Friendliness ◽  
Zinc Dialkyl Dithiophosphate ◽  
The Coefficient Of Friction ◽  
Lubricant Base Stock ◽  
Dialkyl Dithiophosphate

Vegetable oils have recently received worldwide attention for their use as a lubricant base stock that has numerous advantages, including their environmental friendliness. In this study, a refined, bleached and deodorised palm stearin was selected as the base lubricant, and its friction and wear performance were investigated with a pin-on-disk tribotester. The effect of zinc dialkyl-dithiophosphate (ZDDP) additive in concentrations of 1wt%, 3wt% and 5wt% on friction and wear performance were evaluated. Commercial semi-synthetic oil SAE 15W50 was used for comparison purposes. The experiments were conducted at a sliding speed of 1.5 m/s under a normal force of 9.81 N for 60 min. Results show that an increase in ZDDP concentrations improved both friction reduction and wear performance of the lubricant. The coefficient of friction (COF) of RBD palm stearin was reduced approximately at 71% when 5wt% of ZDDP was added and it shows that the friction reduction performance of PS+5wt% (COF=0.039) was comparable to SAE 15W50 (COF=0.035). While, wear coefficient of RBD palm stearin was reduced significantly from 2.08 × 10−3 to 8.89 x 10−5 when 5wt% ZDDP additive was added and it shows that the wear performance of PS+5wt% was better than that of SAE 15W50, 1.94 x 10−4. Further analysis of the wear worn surface with a high-resolution optical microscope was also conducted with a surface profilometer to examine the metallurgy of the pin surface and the roughness of the pin.  

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