Electric arc thermal spraying preparing method for life prolonging and energy saving shape stabilizing PbO2 anode intermediate layer

An intermediate layer and thermal spraying technology, which is applied in the direction of coating, molten spraying, metal material coating process, etc., can solve the problems of high energy consumption and poor durability, and achieve low operating costs, long service life and low power consumption. Effect

Active Publication Date: 2019-05-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 the zirconium nitride-based intermediate layer at low cost, so as to obtain long-life and high-efficiency Ti / ZrN / PbO 2 anode

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric arc thermal spraying preparing method for life prolonging and energy saving shape stabilizing PbO2 anode intermediate layer
  • Electric arc thermal spraying preparing method for life prolonging and energy saving shape stabilizing PbO2 anode intermediate layer
  • Electric arc thermal spraying preparing method for life prolonging and energy saving shape stabilizing PbO2 anode intermediate layer

Examples

Experimental program
Comparison scheme
Effect test

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. Form an uneven bonding primer layer; then use arc spraying technology to prepare the metal nitride intermediate layer, and finally use Ti / ZrN electrode material as the anode, and stainless steel of equal size as the cathode, and anodic electrooxidation to prepare β-PbO 2 active layer, thus obtaining Ti / ZrN / PbO 2 shape stable anode. ZrN-based intermediate layer preparation process parameters: zirconium wi...

Embodiment 2

[0023] Embodiment 2 phenol degradation experiment

[0024] Using polished, alkali-washed and pickled titanium plates as the substrate, the zirconium nitride-based intermediate layer is prepared by arc spraying technology, and then the Ti / ZrN electrode material is used as the anode, and stainless steel of equal size is used as the cathode, and the anode is electro-oxidized. β-PbO 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 / 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, Image 6 ), power consumption is only Ti / PbO 2 1 / 3 of the electrode.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses an electric arc thermal spraying preparing method for a life prolonging and energy saving shape stabilizing PbO2 anode intermediate layer. A conductive and corrosion-resistantzirconium-nitride-based intermediate layer is prepared on the surface of a titanium base material through electric arc thermal spraying, wherein the titanium base material is subjected to oil removaland acid etching pretreatment; then, anode electro-deposition of a beta-PbO2 active layer is conducted on the zirconium-nitride-based intermediate layer, and accordingly a long-service-life and low-energy-consumption Ti / ZrN / PbO2 coating anode is obtained. Excellent electrical conductivity and acid, alkali and salt corrosion resistance of the sprayed zirconium-nitride-based intermediate layer are brought into full play, good bonding strength is achieved between the sprayed zirconium-nitride-based intermediate layer and a titanium matrix, firm loading of the beta-PbO2 active layer can be achieved through the coarse sprayed surface; meanwhile, migration of corrosive media and active oxygen towards an anode substrate can be effectively resisted, screen protection and other functions are achieved, and the service life of an anode is obviously prolonged; and in addition, the intermediate layer has good electrical conductivity, the cell voltage of the electrochemical process is obviously reduced, and energy consumption is reduced.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap