STP1192

    Corrosion Protection of Aluminum Heat-Transfer Surfaces in Engine Coolants Using Monoacid/Diacid Inhibitor Technology

    Published: Jan 1993


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    Abstract

    A low depletion monoacid/diacid corrosion inhibitor technology that provides superior high-temperature aluminum corrosion protection combined with excellent heat-transfer characteristics has been identified. The efficiency of the inhibitor technology was evaluated gravimetrically on aluminum specimens under static and dynamic heat-transfer conditions. Testing techniques and results are discussed. The thermal properties of the protective film and the coolant were evaluated under dynamic heat-exchange conditions. Information on composition and structure of the protective film formed under conditions of heat-transfer was obtained through the use of microscopy and Fourier transform infrared spectrometry (FTIR).

    Keywords:

    engine coolants, corrosion, inhibitors, aliphatic acid, heat-transfer, monoacids, diacids, aluminum, heat-exchange surface


    Author Information:

    Maes, J-P
    Research group leader and development chemist, Texaco Research and Development—Ghent, Ghent,

    Van de Ven, P
    Research group leader and development chemist, Texaco Research and Development—Ghent, Ghent,


    Paper ID: STP25154S

    Committee/Subcommittee: D15.03

    DOI: 10.1520/STP25154S


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