Effect of octadecylamine on carbon steel corrosion under PWR secondary side conditions

    Research output: Book/ReportReport

    Abstract

    Octadecylamine (ODA) is a film forming amine (FFA) that can be used in the secondary side water of pressurized water reactor (PWR) to hinder magnetite depositions and corrosion rates. The effect of ODA on the corrosion rates of carbon steel in PWR secondary side water treated with NH3 was studied as a function of temperature by using in situ and ex situ techniques. As a result, following conclusions can be made: 1. Addition of ODA to the secondary side water treated with NH3 decreases corrosion rate of the studied carbon steel (22K) at T = 228°C by a factor of 3. 2. ODA addition has the same effect on the corrosion rate whether it has been added at the beginning of the exposure (fresh surface) or after a period of pre-oxidation of the carbon steel surface during which a stable magnetite film was grown. This indicates that ODA would effectively slow down also the corrosion of carbon steel at locations where flow assisted corrosion (FAC) takes place. 3. The effect of ODA on the corrosion rates of studied carbon steel seems to diminish as temperature is decreased from 228°C to room temperature.
    Original languageEnglish
    PublisherVTT Technical Research Centre of Finland
    Number of pages116
    Publication statusPublished - 2014
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesVTT Research Report
    NumberVTT-R-06077-14

    Keywords

    • PWR
    • secondary side
    • film forming amine
    • carbon steel
    • corrosion

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  • Cite this

    Sipilä, K., & Saario, T. (2014). Effect of octadecylamine on carbon steel corrosion under PWR secondary side conditions. VTT Technical Research Centre of Finland. VTT Research Report, No. VTT-R-06077-14