脉冲电镀Ni-Cr-Mn合金镀层配位剂的研究

发布时间：2018-06-14 14:00

本文选题：脉冲电镀 + Ni-Cr-Mn合金镀层　；参考：《热加工工艺》2017年18期

【摘要】：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。
[Abstract]:Ni-Cr-Mn alloy coating was prepared on the surface of Q235 steel by pulse electroplating. The effects of different coordination agents, such as ammonium formate, ammonium citrate and complex coordination agent A, on the composition, deposition rate and corrosion resistance of Ni-Cr-Mn alloy coating were studied by means of glow discharge spectrometer and electrochemical workstation. The results show that the effect of three different coordination agents on the composition, deposition rate and corrosion resistance of Ni-Cr-Mn alloy coating is the same. With the increase of the content of coordination agent, the content of Cr-Mn in the coating increased first, then decreased and then increased, but the deposition rate increased first and then decreased. The Ni-Cr-Mn alloy coating prepared by complex coordination agent A had the smallest corrosion current density. The maximum corrosion potential is 9.374 脳 10 ~ (-8) A / cm ~ (-2) -0.288 V, and the corrosion resistance is better.
【作者单位】：华北理工大学冶金与能源学院现代冶金技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(51474088)
【分类号】：TQ153

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