Journal
CORROSION SCIENCE
Volume 212, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110936
Keywords
Low -density steel; B2 phase; Corrosion resistance; Corrosion product film; Aging treatment; Microgalvanic effect
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The microstructural evolution of Fe19Mn-9Al-0.8 C-5Ni low-density steel (LDS) during aging and its influence on corrosion behavior and mechanism were investigated. The study found that the morphology, chemical property, and proportion of the B2 phase in the LDS changed with aging time. These changes effectively inhibited microgalvanic effects and local acidification, leading to improved corrosion resistance. The corrosion mechanism and properties of corrosion product film during aging were also analyzed in detail.
The microstructural evolution during aging and its influence on corrosion behavior and mechanism of the Fe19Mn-9Al-0.8 C-5Ni low-density steel (LDS) were studied. The results showed that the morphology, chemical property and proportion of the B2 phase in the LDS changed with aging time. These changes effectively inhibited the microgalvanic effect between different phases at the initial corrosion and the local acidification at the late stage. Accordingly, the corrosion resistance of the aged LDSs continually increased as the aging time extended. Moreover, the corrosion mechanism and the properties of corrosion product film of the Fe-19Mn-9Al-0.8 C-5Ni LDS during aging were revealed in detail.
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