You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

    Synergistic Tribological Performances of Borate Additive in Lubricants

    Published: 01 January 2008

      Format Pages Price  
    PDF (352K) 9 $25   ADD TO CART
    Complete Source PDF (6.6M) 139 $55   ADD TO CART

    Cite this document

    X Add email address send
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    A four-ball tester was used to evaluate the tribological behaviors of nitrogen-containing borate (BNO) combined with zinc dialkyldithiophosphate (ZDDP) and tin dialkyldithiocarbamates (SnDDC) in liquid paraffin or mineral oil, even respectively. The surface analytical tools such as X-ray photoelectron spectrometer (XPS), X-ray diffractometer (XRD), and energy dispersive X-ray (EDX) were used to investigate the chemical states of some typical elements and composition on the rubbing surface of the wear scar. The tribological results show that BNO exhibits better antiwear properties in base oils, and can exhibit good antiwear synergism when it was combined with additives ZDDP and SnDDC, respectively, while the anti-wear properties of oil-containing additive packages are optimal under certain concentration ranges. The results of XPS and XRD analyses indicated that BNO can form tribochemical mixed protective films consisting of BN or B2O3 compounds on the rubbing surface, and the combination of BNO with SnDDC may form tin, oxides, sulfide, and N-containing compounds on the rubbing surfaces, which contribute to improving the tribological properties of lubricants. A considerable amount of ZDDP can be partially replaced by BNO in synergistic mixtures, or replaced completely by the combination of BNO with SnDDC, which is especially important for ZDDP used in ecologically sensitive applications.


    borate, additive, antiwear, load carrying, synergistic

    Author Information:

    Hu, Jian-Qiang
    Xuzhou Air Force College, Xuzhou,

    School of Chemical Engineering, China University of Mining and Technology, Xuzhou,

    Hu, Yi-Qin
    Xuzhou Air Force College, Xuzhou,

    Liu, Guang-Long
    Xuzhou Air Force College, Xuzhou,

    Ma, Yu-Hong
    Xuzhou Air Force College, Xuzhou,

    Committee/Subcommittee: D02.J0

    DOI: 10.1520/STP45582S