STP705

    Detecting Coolant Corrosivity with Electrochemical Sensors

    Published: Jan 1980


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    Abstract

    The corrosivity of engine antifreeze coolants depends on many factors including inhibitor concentration. Degradation of these antifreeze inhibitors occurs with time in service and therefore leads to increased corrosivity. This paper describes a low cost coolant sensor capable of detecting the corrosivity of engine coolant in-situ. The system is based on electrochemical principles and consists of a sensing probe, electronics package, and an indicating device. Electrochemical theory and supporting data for the system will be presented.

    Keywords:

    corrosion, corrosivity sensor, antifreeze, inhibitor concentration, degradation of inhibitors, coolant maintenance, engine coolants


    Author Information:

    Baboian, R
    Head and Project head, Texas Instruments, Inc., Electrochemical and Corrosion Laboratory, Attleboro, Mass.

    Haynes, GS
    Head and Project head, Texas Instruments, Inc., Electrochemical and Corrosion Laboratory, Attleboro, Mass.


    Paper ID: STP29218S

    Committee/Subcommittee: D15.09

    DOI: 10.1520/STP29218S


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