STP705

    How Good is the ASTM Simulated Service Corrosion Testing of Engine Coolants?

    Published: Jan 1980


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    Abstract

    The ASTM Simulated Service Corrison Testing of Engine Coolants (D 2570–73) was developed to evaluate coolant performance. The method has been plagued by lack of adequate reproducibility which is making the credibility of the method questionable. Several interlaboratory tests and reproducibility studies have been conducted, but no significant progress has been made to improve the reproducibility. A questionnaire was sent to ASTM Committee D15 on Engine Coolants for an opinion of the overall value of the method. Most agree that this test is excellent for development and screening, but its use as a qualifying tool is limited due to the lack of reproducibility. A statistical analysis was performed on the interlaboratory data to obtain the quantitative estimates of reproducibility and repeatability as follows: Y ± 140/60 percent and Y ± 60 percent, respectively, where Y is the value of the corrosion weight losses. These results show that reproducibility is not adequate enough to use the method as a qualifying tool, and repeatability is in a range where it can be used effectively for development, but there is room for improvement of the repeatability also.

    Keywords:

    antifreeze, simulated service test, coolant corrosion test


    Author Information:

    Choinski, JV
    Research staff member and supervisor of research and development, Functional Fluids Laboratory, BASF Wyandotte Corp., Wyandotte, Mich.

    Maxwell, JF
    Research staff member and supervisor of research and development, Functional Fluids Laboratory, BASF Wyandotte Corp., Wyandotte, Mich.


    Paper ID: STP29217S

    Committee/Subcommittee: D15.09

    DOI: 10.1520/STP29217S


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