Prevention of oxidative degradation of ZnDTP by microcapsulation and verification of its antiwear performance

Tribology International

Volumn 41, Issue 11, 2008, Pages 1097-1102

  Masuko, Masabumi ^a   Sato, Hiroyasu ^a   Suzuki, Akihito ^a   Kurosawa, Osamu ^b  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

^b JAPAN ENERGY CORPORATION   (Japan)

Author keywords

Antiwear additive; Degradation; Engine oil; ZnDTP

Indexed keywords

DEGRADATION; ELECTRIC BREAKDOWN; LUBRICATING OILS; SULFATE MINERALS; TRIBOLOGY; WEAR RESISTANCE; WEIGHT CONTROL; ZINC;

ANTIWEAR ADDITIVE; ANTIWEAR PERFORMANCE; CONTACT SURFACES; ENGINE OIL; ENGINE OILS; MICROCAPSULE; OXIDATIVE DEGRADATION; RELEASE CONTROL; ZINC DIALKYL-DITHIOPHOSPHATE; ZNDTP;

LEAKAGE (FLUID);

EID: 47149098647     PISSN: 0301679X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.triboint.2008.01.005     Document Type: Article

References (12)

1. Feng I.-M. Pyrolysis of zinc dialkyl phosphorodithioate and boundary lubrication. Wear 3 (1960) 309-311
2. Dickert Jr. J.J., and Rowe C.N. The thermal decomposition of metal O,O-dialkylphosphorodithioates. J Org Chem 32 (1967) 647-653
3. Coy R.C., and Jones R.B. The thermal degradation and EP performance of zinc dialkyldithiophosphate additives in white oil. ASLE Trans 24 (1981) 77-90
4. Willermet P.A., Dailey D.P., Carter III R.O., Schmitz P.J., and Zhu W. Mechanism of formation of antiwear films from zinc dialkyldithiophosphates. Tribol Int 28 (1995) 177-185
5. 31P-NMR and mass spectrometric studies of the reaction of zinc dialkyl-dithiophosphates with cumene hydroperoxide (Part1). J Jpn Petroleum Inst 38 (1995) 374-383
6. Willermet P.A., and Kandah S.K. Lubricant degradation and wear V. Reaction products of a zinc dialkyl-dithiophosphate and peroxy radicals. ASLE Trans 27 (1984) 67-72
7. Masuko M., Ohkido T., Suzuki A., and Ueno T. Fundamental study of changes in friction and wear characteristics due to ZnDTP deterioration in simulating engine oil degradation during use. Transient process in tribology (2004), Elsevier, Amsterdam (p. 359-66)
8. Masuko M., Ohkido T., Suzuki A., Ueno T., Okuda S., and Sagawa T. Fundamental study of changes in friction and wear characteristics due to ZnDTP deterioration in simulating engine oil degradation during use (part 2) influences of the presence of peroxide and dispersed Zn-containing solids. Life cycle tribology (2005), Elsevier, Amsterdam (p. 769-77)
9. Masuko M., Ohkido T., Suzuki A., Ueno T., Okuda S., and Sagawa T. Effect of ashless dispersant on deterioration of antiwear characteristics of ZnDTP due to decomposition during the oxidation inhibition process. Tribol Trans 50 3 (2007) 310-318
10. Latyshev V.N., et al. Use of microcapsules for delivery of lubricants to contacts of metallic surfaces. Vestnik Mashinostroeniya 5 (1999) 35-37 (In Russian)
11. Sugisawa K, Togami Y, Shouko T. Microcapsules for pressure-sensitive paper. UK Patent GB 2319267 A, 1998.
12. Masuko M., Takeshita N., and Okabe H. Evaluation of anti-wear performance of PFPE-soluble additives under sliding contact in high vacuum. Tribol Trans 38 (1995) 679-685