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The influence of base oil properties on the efficiency of action of ZDDP‐type additives
Author(s) -
Kulczycki A.,
Kajdas C.
Publication year - 1994
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010060206
Subject(s) - base oil , differential scanning calorimetry , base (topology) , viscosity , materials science , viscosity index , thermal stability , thermal analysis , chemical engineering , thermal , composite material , chemistry , organic chemistry , thermodynamics , scanning electron microscope , mathematical analysis , physics , mathematics , engineering
Abstract This paper deals with the analysis of the influence of base oil viscosity on the ability of ZDDP‐containing lubricants to form protective layers (especially antiwear layers). The chemical structure of additives used was characterised according to their thermal stability, determined by differential scanning calorimetry (DSC). The additives were added to base oils of various viscosities. The prepared lubricants were tested using a four‐ball machine, and analysed by DSC. The relationships between base oil viscosity and seizure load (P t ), weld load (P w ) and DSC test results are presented and discussed. The mechanism of interaction between ZDDP and the base oils was analysed by the use of a mathematical model.