应用电化学阻技术并结合物相分析技术研究了合金元素Ｃｒ对Ｆｅ在６５０℃（Ｌｉ，Ｋ）２ＣＯ３共晶熔盐中的腐蚀行为的影响。结果表明，加入５％和１０％Ｃｒ不能改善Ｆｅ的耐腐蚀性能，而加入２０％和２５％Ｃｒ则能显著提高其耐腐蚀性能；Ｆｅ及Ｆｅ－Ｃｒ合金腐蚀电化学阻抗谱呈双容抗弧特征，合金腐蚀受荷电粒子在氧化膜中的迁移控制。提出将合金表面形成的氧化膜理想化为一电容器，并建立了氧化物电容与双电层电容相串联的等效电路来描述合金腐蚀的阻抗特征.此外,根据所提供等效电路对合金腐蚀电化学阻抗谱进行了解析.
Electrochemical irnpedance as well as physical analysis techniques were employed to study the effect of Cr on the camsion of pure iron in eutectic (Li,K)2C03mixture at 650C . 'The results indicated that the addition of 5 % and 10 %Cr to pure iron had little effect on its curmion resistance, hver the additives of 20% and 25 % Cr could greatly improve the corrosion resistance of iron. 'The Nyquist plots for the corrosion of pure Fe and Fe-Cr alloys in the melt were mnposed of tm capacitance loops, and the cornion was conmlled by the tmnsportation of species in the scale. It was propxed that the oxide scale be idealized as a capacitor, thus, an equivalent circuit of aide capacitance in series with double-layer capacitance was established to represent the impedance spectra for Fe and Fe-Cr alloys. Additionally, based on the equivalent circuit prod, the lrnpedance spectra were evaluated.
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