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The superhydrophobic surfaces on kovar alloys substrates were prepared by a two-step methodology. The Kovar alloys sheets were first immersed in the HNO₃(10%) and H₂O₂(10%) mixed solution for 10min, and then immersed in the 0.01mol/L ethanol solution of stearic acid for 48h. The sample surfaces were characterized by SEM, CLSM, EDS,XPS and optical contact angle meter. The results show that the surfaces composed of porous structures and were successfully modified with stearic acid, the contact angle of the prepared surfaces were as large as 154◦. The anti-corrosion property was evaluated by Tafel plot, as the superhydrophobic surfaces could prevent the contact of metal with Cl- ion, the surfaces had a good anti-corrosion property.