电沉积非晶态Fe-Co-Ni-P镀层的制备及性能

发布时间：2018-02-04 08:53

本文关键词： 电沉积电镀极化曲线交流阻抗谱气蚀　出处：《中国表面工程》2017年02期 　论文类型：期刊论文

【摘要】：通过改变镀液中H_3PO_3的添加量(15~40 g/L)制备不同P含量的Fe-Co-Ni-P镀层,采用XRD衍射仪、交流阻抗谱和超声波气蚀试验,分别研究和分析了P含量对镀层的结构以及腐蚀、气蚀性能的影响。结果表明:该四元合金镀层基本都为非晶态。随着合金镀层中P含量增加,镀层表面的胞状组织越来越细密,其耐腐蚀性能逐渐增强。当镀液中H_3PO_3添加量为40 g/L时,镀层的耐腐蚀性能最好。当镀液中H_3PO_3为15 g/L时,交流阻抗谱表现出Warburg阻抗的特征,溶液状态由电荷迁移、扩散以及化学反应混合。当镀液中H_3PO_3为20~40 g/L时,镀层的交流阻抗谱都只有一个容抗弧,表现出一个时间常数特征,且电极过程存在扩散受阻的现象。当镀液中H_3PO_3为40 g/L时,拟合的等效电路中的镀层电荷转移电阻Rf达到最大值3 494Ω?cm~2。且当镀液中H_3PO_3的添加量为40 g/L时,其镀层抗气蚀性能也最好。
[Abstract]:The Fe-Co-Ni-P coating with different P content was prepared by changing the amount of H3PO3 added in the bath. The structure and corrosion of the coating were studied and analyzed by means of XRD diffractometer, AC impedance spectroscopy and ultrasonic cavitation test. The results show that the four element alloy coating is almost amorphous. With the increase of P content in the alloy coating, the cellular structure of the coating surface becomes more and more fine. The corrosion resistance of H3PO3 is improved gradually. When the amount of H3PO3 in the plating solution is 40 g / L, the corrosion resistance of the coating is the best. When H3PO3 is 15 g / L in the plating solution, the impedance spectrum of AC exhibits the characteristic of Warburg impedance, and the state of the solution is transferred by charge. Diffusion and chemical reaction mixing. When H _ 3PO _ 3 in the plating solution is 20g / L, the AC impedance spectrum of the coating has only one capacitance reactance, showing a characteristic of a time constant, and the diffusion of the electrode process is blocked. When the H3PO3 in the plating solution is 40 g / L, In the fitted equivalent circuit, the charge transfer resistance (RF) of the coating reaches the maximum value of 3 494 惟? When the H3PO3 content in the plating solution is 40 g / L, the anti-cavitation performance of the coating is the best.
【作者单位】：河海大学机电工程学院;河海大学疏浚技术教育部工程研究中心;
【基金】：国家自然科学基金(51475140)~~
【分类号】：TQ153.2
【正文快照】： 引文格式:罗婵媛,纪秀林,李泽.电沉积非晶态Fe-Co-Ni-P镀层的制备及性能[J].中国表面工程,2017,30(2):92-97.LUO C Y,JI X L,LI Z.Preparation and properties of electrodeposited amorphous Fe-Co-Ni-P coatings[J].China Surface Engineering,2017,30(2):92-97.电沉积镍合

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