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Preparation and Properties of Ti-based composite anode materials

Author: JiangZuoZuo
Tutor: GuoZhongCheng
School: Kunming University of Science and Technology
Course: Non-ferrous metallurgy
Keywords: Lead Polyaniline Tungsten carbide Composite electrodeposition Electrochemical properties
CLC: TM910.4
Type: Master's thesis
Year: 2010
Downloads: 54
Quote: 0
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Abstract


In the zinc electrowinning process, the current widespread use of Pb-Ag alloy anode, but there are some shortcomings, such as short-lived, high cell voltage, low current efficiency. Based on the above problems, the paper substrate of titanium, a new Pb-PANI-WC composite anode material in two different plating bath system, the electrochemical deposition method. In alkaline and acid bath process and electrochemical properties of Pb-PANI-WC composite anode materials were prepared by the experimental conditions to determine the the composite electrodeposition best in both the bath process conditions. Electrochemical test, compared Pb-PANI prepared in both the bath-WC composite anode material, anode material of pure lead and lead-silver alloy electro-catalytic performance of the composite anode materials electro-catalytic performance than pure lead anode material and lead-silver alloy, which Youyi alkaline prepared the best anode material. Also the corrosion resistance of the four anode materials tested, Pb-PANI-WC composite anode materials resistant to corrosion than pure lead anode and lead-silver alloy, corrosion-resistant composite anode materials prepared in the alkaline bath the best. Second, the structure, morphology and properties of alkaline and acid bath prepared Pb-PANI-WC composite anode material analysis, infrared spectroscopy showed that both Pb-PANI-WC composite anode materials are poly the characteristic peaks of the aniline. Composite anode material compared to some of the peaks of PANI and PANI peaks position the change may be due to PANI certain groups lead role. 2, scanning electron microscopy analysis showed that the spherical grains of the anode prepared in the alkaline bath, a polyhedral shape and granular grains on the anode was prepared in an acidic plating bath. Spectroscopy detection confirmed that both of the anode material containing tungsten codeposition of tungsten and lead. 3, the X-ray diffraction analysis showed that the composite anode material in both the bath, the main diffraction peak of lead addition to WC diffraction peak is found, the diffraction peak of PANI, may be due to the coating layer polyaniline less, weak diffraction peaks, and so is not displayed. Third, the study of two composite anode material in the electrowinning of zinc tested two bath in the composite anode material strength lifetime, cell voltage, current efficiency and other indicators in the zinc electrowinning applications, its performance is superior to pure lead plating, wherein the anode material is prepared in the alkaline bath is better than the acidic plating bath.

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