Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Surface-coated composite anode of porous aluminum rod and lead alloy for zinc electrodeposition and preparation method thereof

A technology of surface coating and composite anode, applied in electrodes, anodic oxidation, surface reaction electrolytic coating, etc., can solve the problems of reduction, interface resistance and short life, and achieve enlargement of contact area, good compactness, and easy oxidation prevention. Effect

Active Publication Date: 2020-04-28
KUNMING UNIV OF SCI & TECH +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using cheap aluminum rods as the substrate, the material cost is significantly reduced, but there are still problems of interface resistance and short life

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
  • Surface-coated composite anode of porous aluminum rod and lead alloy for zinc electrodeposition and preparation method thereof
  • Surface-coated composite anode of porous aluminum rod and lead alloy for zinc electrodeposition and preparation method thereof
  • Surface-coated composite anode of porous aluminum rod and lead alloy for zinc electrodeposition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the composite anode coated with porous aluminum rod and lead alloy surface for zinc electrowinning, the steps are as follows:

[0031] a. Preparation of matrix aluminum rod: firstly, the 5052 aluminum rod is drawn by extrusion, and then degreased, degreased in NaOH solution with a mass fraction of 15% for 8 minutes, then washed with water immediately, and then placed on the phosphoric acid anode In the oxidizing solution, pure lead is used as the cathode, the temperature is 20°C, and the anode current density is 2A / dm 2 , the voltage is 30V, after electroplating under air blowing for 30min, a large amount of water is washed, and then placed in HC1 with a mass fraction of 20% for activation for 20min, the activation temperature is controlled at 30°C, and then washed with deionized water to obtain a surface such as figure 2 Porous matrix aluminum rod 1 is shown. The anodizing solution consists of phosphoric acid (H 3 PO 4 ) 200g / L, oxalic aci...

Embodiment 2

[0039] The preparation method of the composite anode coated with porous aluminum rod and lead alloy surface for zinc electrowinning, the steps are as follows:

[0040] a. Preparation of matrix aluminum rod: firstly, the 1060 aluminum rod is drawn by extrusion, and then degreased, degreased in NaOH solution with a mass fraction of 20% for 1 min, then washed with water immediately, and then placed on a phosphoric acid anode In the oxidizing solution, pure lead is used as the cathode, the temperature is 30°C, and the anode current density is 1A / dm 2 , the voltage is 50V, after electroplating under air blowing for 50min, washed with a large amount of water, placed in 5% HCl for activation for 30min, the activation temperature is controlled at 50°C, and then washed with deionized water to obtain a porous matrix aluminum rod 1. The composition of the anodizing solution is H 3 PO 4 300g / L, H 2 C 2 o 4 2H 2 O 10g / L, NaC 12 h 25 SO 4 0.5g / L;

[0041] b. Preparation of Pb / Ag m...

Embodiment 3

[0048] The preparation method of the composite anode coated with porous aluminum rod and lead alloy surface for zinc electrowinning, the steps are as follows:

[0049] a. Preparation of the matrix aluminum rod: firstly, the 6061 aluminum rod is drawn by extrusion, and then it is degreased, degreased in a NaOH solution with a mass fraction of 10% for 10 minutes, and then washed with water immediately, and then placed on the phosphoric acid anode In the oxidizing solution, pure lead is used as the cathode, the temperature is 10°C, and the anode current density is 3A / dm 2 , the voltage is 20V, after electroplating under air blowing for 10min, wash with a large amount of water, place in HCl with a mass fraction of 30% to activate for 2min, control the activation temperature at 20°C, and then wash with deionized water to obtain a porous matrix aluminum rod 1. The composition of the anodizing solution is H 3 PO 4 150g / L, H 2 C 2 o 4 2H 2 O 3g / L, NaC 12 h 25 SO 4 0.05g / L;

...

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
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a porous aluminum bar lead alloy surface-coated composite anode applied to zinc electrodeposition and a preparation method thereof. The composite anode is composed of a substrate aluminum bar (1), a reinforcement layer coating the substrate aluminum bar and a surface active layer (4) coating the reinforcement layer, wherein the reinforcement layer comprises a bottom layer (2) and an intermediate layer (3); the bottom layer is a Pb / Ag metal composite layer; the intermediate layer is a lead alloy layer; the surface active layer is a composite manganese dioxide layer containing nano-tungsten carbide; the mass percentage of tungsten carbide in the surface active layer is 0.6-2.4wt.%. The prepared surface-coated composite anode is applied to zinc electrodeposition; compared with the conventional lead-silver alloy anode, the bath voltage is reduced by 120-240mV; the porous aluminum bar lead alloy surface-coated composite anode is long in service life and low in cost; the current efficiency is improved by 2-4%.

Description

technical field [0001] The invention relates to the technical field of anodes for electrolysis, in particular to a surface-coated composite anode for zinc electrowinning and a preparation method thereof. Background technique [0002] At present, the electric zinc produced by the hydrometallurgy process has accounted for more than 80% of the total output of zinc ingots in the world. In the hydrometallurgical electrodeposition process of Zn, the anode material is one of the key components of the electrodeposition process. The direction and kinetics of the electrode process, the structural type of the electrolytic cell, the power consumption and the quality of the cathode product largely depend on the properties of the anode material. Anode materials must meet the requirements of good electrical conductivity, mechanical strength and processability, high electrocatalytic activity, strong corrosion resistance, long life and low cost. However, because the electrowinning process ...

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 Patents(China)
IPC IPC(8): C25C7/02C25C1/16C25D11/08C25D11/10C25D3/34C25D5/10C25D3/46B22D19/16C23C18/12C25D11/24C23C28/00
CPCB22D19/16C23C18/1216C23C18/127C23C28/321C23C28/34C25C1/16C25C7/02C25D3/34C25D3/46C25D5/10C25D11/08C25D11/10C25D11/24
Inventor 陈步明黄惠郭忠诚冷和李学龙汪世川闫文凯李威
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com