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Lead dioxide electrode and preparation process thereof of aluminum alloy surface ceramic-coating

A lead dioxide, preparation technology, applied in the direction of electrodes, electrolytic process, electrolytic components, etc., to achieve high corrosion resistance, broad market prospects, and strong adhesion

Active Publication Date: 2011-09-07
江西南亚铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And electrodeposit lead dioxide on the surface of this layer of ceramic film to prepare aluminum alloy ceramic base lead dioxide electrode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: The composition and content of PECC electrolyte are as follows: sodium hypophosphite 10g / L, sodium aluminate 50g / L, sodium polyphosphate 50g / L, trisodium phosphate 50g / L, sodium tungstate 5g / L , sodium silicate 40g / L, sodium stannate 25g / L, glycerol 50g / L, current density 0.5A / dm 2 , Arc discharge voltage 100 ~ 200V. Coating process of tin antimony oxide coating: on this aluminum alloy ceramic sheet, SnCl 4 4H 2 O and SbCl 3 ·H 2 O, according to the mass ratio of 0.5, it was formulated as n-butanol hydrochloric acid solution, slowly covered on the surface of the electrode and then dried, repeated several times, and then thermally decomposed at 450 ° C, and then washed and dried. Preparation of lead dioxide electrode: (a) lead dioxide electroless plating. Plating solution formula: Pb(NO 3 ) 2 , 0.5mol / L; NH 4 Ac 1mol / L, (NH 4 ) 2 S 2 o 4 1mol / L, pH 7, temperature 40°C. (b) Electroplating α-PbO 2 . With 190g / L PbO, 20g / L HNO 3 , 60g / L glacial...

Embodiment 2

[0035] Embodiment 2: the component and content of PECC electrolyte are as follows: sodium aluminate 80g / L, sodium polyphosphate 100g / L, trisodium phosphate 50g / L, sodium tungstate 10g / L, sodium silicate 80g / L, Sodium hypophosphite 100g / L, tartaric acid 100g / L. Current density 1A / dm 2 , Arc discharge voltage 100 ~ 300V. Coating process of tin antimony oxide coating: on this aluminum alloy ceramic sheet, SnCl 4 4H 2 O and SbCl 3 ·H 2 O, according to the mass ratio of 1.0, make n-butanol hydrochloric acid solution, slowly cover the surface of the electrode and then dry it, repeat several times, then thermally decompose at 450 ° C, and then wash and dry. The preparation of the lead dioxide electrode is the same as in Example 1.

Embodiment 3

[0036] Embodiment 3: The composition and content of PECC electrolyte are as follows: sodium hypophosphite 100g / L, sodium aluminate 40g / L, sodium polyphosphate 20g / L, sodium tungstate 2g / L, sodium silicate 6g / L , Glycerol 100g / L. Sodium stannate 50g / L, current density 3A / dm 2 , Arc discharge voltage 100 ~ 380V. Coating process of tin antimony oxide coating: on this aluminum alloy ceramic sheet, SnCl 4 4H 2 O and SbCl 3 ·H 2 O, according to the mass ratio of 2.0, it was prepared as n-butanol hydrochloric acid solution, slowly covered the surface of the electrode and then dried, repeated several times, and then thermally decomposed at 450 ° C, and then washed and dried. The preparation of the lead dioxide electrode is the same as in Example 1.

[0037] The specific operation method is as follows: pretreatment of aluminum alloy→water washing→PECC treatment→water washing→coating tin dioxide and antimony trioxide composite coating→electroless lead dioxide plating→electroplatin...

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PUM

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Abstract

The invention relates to a lead dioxide electrode and a preparation process thereof of aluminum alloy surface ceramic-coating, disclosing the steps of adopting a plasma enhanced electro-chemical surface ceramic-coating (PFCC) technology to ceramic-coat the surface of the aluminum alloy to prepare a high corrosion resistance and high abrasive resistance ceramic film and electrically precipitating the lead dioxide on the ceramic film to prepare an aluminum alloy / ceramic matrix lead dioxide electrode, so that the defect that the electrodes prepared only by using ceramics are breakable and damageable is solved. The lead dioxide can be prepared into electrode structures with plate shape, sheet shape, stripe shape and mesh shape. The lead dioxide electrode has the advantages of low cost and excellent property, thereby bringing good economic benefit to enterprises and having broad market prospect. The aluminum alloy ceramic production technology has no self-pollution and the production process of the lead dioxide electrode has environmental protection measurements without environmental pollution.

Description

technical field [0001] The invention relates to a material surface treatment method and the preparation of a novel lead dioxide electrode, in particular to an aluminum alloy plasma electrochemically enhanced surface ceramicization process and a lead dioxide electrodeposition method. Background technique [0002] The lead dioxide electrode has the advantages of good corrosion resistance, strong conductivity, and high oxygen evolution overpotential, and is an excellent anode material. As early as 1934, the lead dioxide electrode was used as a substitute for the Pt electrode in the production of perchlorate. Because lead dioxide has the characteristics of high oxygen evolution overpotential, good corrosion resistance and excellent electrical conductivity, it is widely used in chemical production, water pollutant treatment and cathodic protection and other fields. Lead dioxide electrodes can replace platinum electrodes in some places, and have been successfully used in the elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/16
Inventor 余刚汤青生
Owner 江西南亚铝业有限公司
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