A life-prolonging, energy-saving and shape-stable PBO 2 Preparation method of arc thermal spraying for anode intermediate layer

An intermediate layer, thermal spraying technology, applied in coating, fusion spraying, metal material coating process and other directions, can solve the problems of high energy consumption and poor durability, and achieve low operating costs, long service life and convenient operation. Effect

Active Publication Date: 2020-11-06
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0003] In order to overcome the problems of poor durability and high energy consumption in the above-mentioned existing DSA preparation technology, the object of the present invention is to provide a life-prolonging, energy-saving and shape-stable PbO 2 The arc thermal spraying preparation method of the anode intermediate layer can prepare a zirconium nitride-based intermediate layer at low cost, thereby obtaining a long-life and high-efficiency Ti / zirconium nitride-based intermediate layer / β-PbO 2 anode

Method used

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  • A life-prolonging, energy-saving and shape-stable PBO <sub>2</sub> Preparation method of arc thermal spraying for anode intermediate layer
  • A life-prolonging, energy-saving and shape-stable PBO <sub>2</sub> Preparation method of arc thermal spraying for anode intermediate layer
  • A life-prolonging, energy-saving and shape-stable PBO <sub>2</sub> Preparation method of arc thermal spraying for anode intermediate layer

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Embodiment 1

[0022] First, the titanium plate that has been polished, alkali-washed, and pickled is used as the substrate to prepare the zirconium nitride-based intermediate layer. The arc spraying technology uses nickel-cobalt alloy (Ni(Co)CrY) as the consumable, and the arc voltage is 5-35V. The power is 30-40kW, the spraying distance is 100-200mm, the compressed air pressure is 0.3-0.6MPa, and the spraying time is 5-10s. With the help of high-temperature and high-speed flame flow, the nickel-cobalt alloy wire is melted, and the molten nickel-cobalt particles hit the titanium substrate. , forming an uneven bonded primer layer; then the metal nitride intermediate layer is prepared by arc spraying technology, and finally the electrode material of the Ti / zirconium nitride-based intermediate layer is used as the anode, and stainless steel of equal area size is used as the cathode, and the anodic electrooxidation is prepared. β-PbO 2 active layer, resulting in a Ti / ZrN-based interlayer / β-PbO ...

Embodiment 2

[0023] Embodiment 2 phenol degradation experiment

[0024] The ground, alkali-washed and pickled titanium plate is used as the substrate, and the zirconium nitride-based intermediate layer is prepared by arc spraying technology, and then the electrode material of the Ti / zirconium nitride-based intermediate layer is used as the anode, and stainless steel of equal size is used as the cathode , prepared β-PbO by anodic electrooxidation 2 Active layer (electrodeposition temperature is 40±5°C, electrodeposition time is 60min, current density is 20mA / cm 2 ). Groove pressure records of the prepared surface ( Figure 5 ). Ti / ZrN-based interlayer / β-PbO 2 Electrodes and Ti / PbO 2 The comparison of the electricity consumed by the electrode for 100mg / L phenol simulated wastewater degradation for 3h to remove phenol showed a decrease of 0.007 degrees (tank pressure record, Figure 6 ), power consumption is only Ti / PbO 2 1 / 3 of the electrode.

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Abstract

The invention discloses a life-prolonging, energy-saving and shape-stable PbO 2 The arc thermal spraying preparation method of the anode intermediate layer is to prepare a conductive and corrosion-resistant zirconium nitride-based intermediate layer by using arc thermal spraying on the surface of the titanium substrate that has been pretreated by degreasing and acid etching, and then coat the zirconium nitride-based Anodic electrodeposition of β-PbO on the interlayer 2 Active layer for long life, low energy consumption Ti / ZrN-based interlayer / β‑PbO 2 Structural Coating Anodes. The invention takes full advantage of the excellent electrical conductivity of the sprayed zirconium nitride-based intermediate layer, acid, alkali, and salt corrosion resistance, not only has good bonding strength with the titanium substrate, and the rough sprayed surface can firmly load β-PbO 2 The active layer can effectively prevent the migration of corrosive media and active oxygen to the anode substrate, and play a role in barrier protection, which significantly prolongs the service life of the anode. In addition, the good conductivity of the middle layer makes the cell voltage of the electrochemical process significantly Reduced energy consumption.

Description

technical field [0001] The invention belongs to the technical field of preparation of lead dioxide DSA electro-oxidation electrodes, in particular to a life-prolonging, energy-saving and shape-stable PbO 2 A method for preparing an anode intermediate layer by arc thermal spraying. Background technique [0002] The anode is a key part of the electrochemical industry. With the development of the industry, the traditional anode gradually shows its limitations. The titanium-based oxide insoluble anode coating brings a leap forward in electrochemistry. PbO 2 It has excellent electrical conductivity similar to metal, has good corrosion resistance in aqueous solution, good electrocatalytic performance, high oxygen evolution overpotential, and low manufacturing cost, and has become a widely used electrolytic production of many inorganic and organic compounds, One of the anode materials such as electrochemical oxidation to remove organic matter in sewage and acid liquid oxygen evol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/131C23C4/10C23C4/11
Inventor 唐长斌王飞牛浩黄平于丽花薛娟琴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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