SEDL / STP / STP1192-EB / STP25154S

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

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,

Pages: 14    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).