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利用脉冲电镀方法在Q235钢表面制备Ni-Cr-Mn合金镀层。采用辉光放电光谱仪、电化学工作站等设备,研究了不同的配位剂:甲酸铵、柠檬酸铵、复合配位剂A对Ni-Cr-Mn合金镀层成分、沉积速率及耐蚀性的影响。结果表明,三种不同的配位剂对Ni-Cr-Mn合金镀层成分、沉积速率及耐蚀性的影响相同。随着配位剂含量的增加,镀层中Cr、Mn含量先升高后降低,Ni含量先降低后升高;然而沉积速率先升后降;复合配位剂A制备的Ni-Cr-Mn合金镀层,具有最小的腐蚀电流密度、最大的腐蚀电位,分别为9.374×10~(-8)A/cm~2、-0.288 V,耐蚀性更佳。
Preparation of Ni-Cr-Mn alloy coating on Q235 steel surface by pulse plating. The effects of different complexing agents, such as ammonium formate, ammonium citrate, and complex complexing agent A on the composition, deposition rate and corrosion resistance of Ni-Cr-Mn alloy coatings were studied by means of glow discharge spectrometer and electrochemical workstation. . The results show that the three different complexing agents have the same effect on the composition, deposition rate and corrosion resistance of Ni-Cr-Mn alloy coatings. With the increase of the content of the complexing agent, the content of Cr and Mn in the coating first increases and then decreases, while the content of Ni decreases firstly and then increases; however, the deposition rate first and then decreases; the Ni-Cr-Mn alloy prepared by the complexing agent A The coating has the lowest corrosion current density and the largest corrosion potential of 9.374 × 10 -8 A / cm -2 and -0.288 V, respectively. The corrosion resistance is better.