The corrosion behavior of carbon steel in the neutral and alkaline solutions with Cl^- and SO₄^2- were investigated by Localized Electrochemical Impedance Spectroscopy (LEIS) technique. The corrosion products on the surface of sample were analyzed by Laser Micro-Raman Spectrometry. The experimental results indicated that the corrosion rate in the neutral solution was higher than that in the alkaline solution during the initial stage of immersion. In the neutral solution, the corrosion products were rapidly deposited on the surface of the sample. The corrosion products film was composed of γ-FeOOH, which could protect matrix of Q235 carbon steel and reduce the ion penetration. As the immersion time increased, the Cl^- and SO₄^2- ions damaged corrosion product films. Especially in the alkaline solution during the initial stage, the average impedance value was much higher. But the average impedance rapidly decreased with increase of the steeping time. Moreover, the destructive effect of Cl^- and SO₄^2- ions on the passive film is also demonstrated in corrosion process through the change of impedance value as the steeping time increases.