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    Extending the Simulated Service Test for Developing and Evaluating Extended Service Interval Engine Coolants

    Published: 2014

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    ASTM Committee D15 on Engine Coolants and Related Fluids has discussed numerous possible updates or modifications to the ASTM D2570 test method. Many of these modifications are suggested by published Japanese and Korean methods that use similar test rigs. These requests alter the coupon metals, time, temperature, and coolant concentration of the coolant sample in an effort to better represent the behavior of the coolant on various metals in glassware tests over extended periods of time. The test is already performed with modifications required by JIS K2234 coolant specifications and Hyundai coolant specifications. It is possible to modify the corrosive challenges to the coolant by modifying the coolant mixture from that in the published method, as has been proposed by engineers at Korean Testing & Certification. This paper explores the possible value of using modifications to ASTM D2570, including variations published in global original equipment manufacturer and industry specifications such as JIS K2234 and Hyundai specifications. It also explores the use of a coupon bundle that more closely approximates the metals in today's light-duty automotive systems. Finally, it invites the global automotive community to focus a coordinated effort on updating this test method, even if that results in multiple embodiments for different types of coolant service (i.e., light duty versus heavy duty).


    glycerin, glycerol, engine coolant, antifreeze, extended service, heavy duty, organic acid technology, OAT, carboxylate

    Author Information:

    Trevino, Elmo
    Amalgatech, Phoenix, AZ,

    Eaton V, Edward R.
    Amalgatech, Phoenix, AZ,

    Committee/Subcommittee: D15.21

    DOI: 10.1520/STP155620130100