2、45 ℃和10 g/L檸檬酸三銨。Ni-Fe-Co合金鍍層的鈷含量隨著鈷離子濃度的增加而線性增加，鍍層均為簡單的面心立方固溶體結(jié)構(gòu)。隨著鍍層中鈷含量的增加，鍍層的耐腐蝕性能和硬度先升高后降低。Ni-Fe-13.51Co（質(zhì)量分?jǐn)?shù)）鍍層具有顯著的防腐蝕性能，其電荷轉(zhuǎn)移電阻為3031 Ω·cm2，腐蝕電流密度為5.754×10-6 A/cm2。;Ni-Fe-Co alloy coatings were obtained on mild steel substrates by electrodeposition from stable acidic citrate solution. The effects of plating conditions and cobalt content on the coating performance were investigated? and the optimal electrodeposition pro-cess parameters were obtained. The alloy coatings were investigated by scanning electron microscope, energy dispersive spectrometer, electrochemical impedance spectrum, polarization curve, and digital microhardness meter. Results show that the suitable processing parameters are 10 A/dm2, 45 °C, and triammonium citrate of 10 g/L. The cobalt content of Ni-Fe-Co alloy coatings is increased linearly with increasing the cobalt ion content. The coatings have simple face-centered cubic solid solution structure. With increasing the cobalt content in the coating, the corrosion resistance and microhardness of coatings are increased firstly and then decreased. The Ni-Fe-13.51Co (wt%) coating exhibits the remarkable corrosion resistance: the charge transfer resistance is 3031 Ω·cm2, and the corrosion current density is 5.754×10-6 A/cm2."/>