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is the primary constituent. Moreover, the corrosion of oxide film in NaCl solution is marked by anodic activation dissolution. The thermal oxidation samples demonstrate better corrosion resistance than the original samples with the increase of oxidation temperature, there is an upward trend in the self-corrosion potential, whereas a decreasing trend in the corrosion current density, and the capacitor-reactance arc radius is gradually increased. The maximum corrosion potential, the minimum corrosion current density and the largest capacitor-reactance arc radius are recorded at 600 °C, at which temperature it has the best corrosion resistance.
Liu et al. (Fri,) studied this question.