Presented is a literature and patent review of organic acids as corrosion inhibitors for use in engine coolants. The technology is directed towards use of acid combinations or acids with conventional inhibitors because no individual acid can provide protection to the range of metals used in cooling systems. Some examples are: aliphatic monoacids with diacids, azelaic acid with aromatic acids, molybdate with two or more aliphatic acids, and sebacic acid with benzotriazole. Claimed advantages are non-depletion (‘long-life’ coolants), non-silicate (gelation and pump seal wear concerns) and non-nitrite (nitrosamine formation), and compatibility with ethylene glycol and propylene glycol.


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    Title :

    Review of Organic Acids as Inhibitors in Engine Coolants


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1996



    Publication date :

    1996-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Review of organic acids as inhibitors in engine coolants

    Weir,T.W. / van de Ven,P. / ARCO Chemical,US et al. | Automotive engineering | 1996


    Review of Organic Acids as Inhibitors in Engine Coolants

    Weir, T. W. / Van de Ven, P. / Society of Automotive Engineers | British Library Conference Proceedings | 1996


    Testing of Organic Acids in Engine Coolants

    Weir, T. W. / ASTM; Committee D-15 on Engine Coolants | British Library Conference Proceedings | 1999



    ENGINE COOLANTS

    SAE Technical Papers | 1988