Results 151 to 160 of about 322 (174)

The role of sulphur in ZDDP‐induced reaction films formed in the presence of ZDDP: Contribution of electron spectroscopic imaging technique

Lubrication Science, 1990
AbstractThe anti‐wear action of zinc dithiophosphate (ZDDP), extensively used in engine oils, is here studied by analysis of wear particles generated during a friction test between two ferrous substrates. It is known in this case that the interfacial film is complex, and contains elements from surfaces, environment and degradation products of the ...
M. Hallouis, M. Belin, J. M. Martin
openaire   +1 more source

Friction response of ZDDP thermal film and tribofilm

Tribology - Materials, Surfaces & Interfaces, 2011
An original dynamic tribotest was used to study the friction response of two kinds of tribological surface: zinc-dialkyl-dithio-phosphate (ZDDP) thermal film and ZDDP tribofilm. This apparatus allows friction to be determined with no need for measuring tangential force.
Njiwa, P, Minfray, C., Belin, M., Rigaud, Emmanuel, Martin, M.   +4 more
openaire   +1 more source

Film thickness and roughness of ZDDP antiwear films

Tribology Letters, 2007
The two experimental techniques, spacer layer interferometry imaging (SLIM) and atomic force microscopy (AFM), have been used to measure the thickness and roughness of zinc dialkyl dithiophosphate (ZDDP) reaction films formed in a rolling-sliding minitraction machine (MTM) tribometer.
Ksenija Topolovec-Miklozic, T. Reg Forbus, Hugh A. Spikes   +2 more
openaire   +1 more source

Antiwear Characteristics of a Commercial Secondary ZDDP Additive

Tribology Transactions, 1993
A four-ball wear machine was used to follow the performancel wear scar appearance of a commercial secondary ZDDP antiwear additive in basestock. At a spindle speed of 1200 rpm, a protective glassy layer formed on the wear scar within seconds that gave excellent wear protection. The layer thickened unevenly forming mounds typically 20 μm diameter by a 0.
J. S. Sheasby, Z. Nisenholz Rafael
openaire   +1 more source

molecular spectroscopic studies of ZDDP—PIBS interactions

Lubrication Science, 1998
AbstractThe effect of the nature and alkyl chain length of zinc dialkyldithiophosphate (ZDDP) (R = C4 to C8) on its interactions with polyisobutenyl succinimide (PIBS) has been investigated using 31P‐NMR and infrared spectroscopy. 31P‐NMR spectra of ZDDP in the presence of PIBS showed both broad (35–850 Hz) and sharp (50–100 Hz) resonance signals due ...
G. S. Kapur, Anju Chopra, S. S. V. Ramakumar, A. S. Sarpal   +3 more
openaire   +1 more source

Lubrication of aluminium–silicon surfaces with ZDDP and detergents

Tribology - Materials, Surfaces & Interfaces, 2012
A review of the lubrication of aluminium–silicon (Al-Si) substrates by zinc dialkyldithiophosphate (ZDDP) and detergent engine oil additives is presented. Greater attention has been paid to understand the interactions of ZDDP, rather than detergents, with the aforementioned non-ferrous substrates.
M Burkinshaw, A Neville, A Morina, M Sutton   +3 more
openaire   +1 more source

Effect of atmospheric gas on ZDDP tribofilm formation

Tribology International
Naoki Yamashita, Tomoko Hirayama
exaly   +2 more sources

Synthesis of Fluorinated ZDDP Compounds

Tribology Letters, 2008
Kajal Parekh, Xin Chen, Pranesh B. Aswath   +2 more
openaire   +1 more source

A novel experimental analysis of the rheology of ZDDP tribofilms

2003
In this study, the rheology and durability of tribofilm has been investigated. A ZDDP tribofilm (6×8 mm) has been partially removed by Ar+ ion etching (5keV), using an aluminum mask with a comb shape. A striped sample was obtained with a lateral alternation of etched zones and ZDDP tribofilm areas, respectively (about 1 mm width).
openaire   +1 more source

Beyond ZDDP

Lubrication Science, 2008
openaire   +1 more source