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A kind of coated titanium anode and its spraying pyrolysis preparation method

A technology for spraying pyrolysis and titanium anodes, which is applied in coatings, metal material coating processes, liquid chemical plating, etc. to achieve the effects of easy industrialization, high dehydration efficiency, and rapid and accurate preparation.

Active Publication Date: 2018-11-02
SHANGHAI TECHASE ENVIRONMENT PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a coated titanium anode and its preparation method by spraying and pyrolysis. The electrode preparation raw material slurry is atomized and sprayed on the surface of the titanium plate at a certain temperature, and the electrode preparation raw material slurry is thermally decomposed on the surface of the anti-oxidation layer to form a dense oxide film deposition layer, and finally a coated titanium electrode containing iridium dioxide is obtained through high-temperature sintering. This solves the technical problem that the traditional brush coating process in the prior art cannot reduce the production cost of the coated titanium anode while ensuring that the coated titanium anode has sufficient, continuous and stable quality and performance

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  • A kind of coated titanium anode and its spraying pyrolysis preparation method
  • A kind of coated titanium anode and its spraying pyrolysis preparation method
  • A kind of coated titanium anode and its spraying pyrolysis preparation method

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preparation example Construction

[0043] The invention provides a coating titanium anode spray pyrolysis preparation method, comprising the following steps:

[0044] (1) Pretreatments such as grinding, degreasing and etching are carried out to the titanium plate. The grinding operation is to use sandpaper to polish until metallic luster appears; the degreasing operation is to use lye to wash the titanium plate for 2 to 3 times; The titanium plate is put into acid and boiled for 1-5 hours. The titanium oxide layer on the surface of the pretreated titanium plate is polished off, and the oil stains are cleaned off by degreasing operations. Etching can increase the surface roughness of the titanium plate and enhance the adhesion of the coating.

[0045](2) Coating an anti-oxidation layer, also known as an intermediate layer, on the surface of the pretreated titanium plate. The anti-oxidation layer can be a dense thin film of conductive metal oxide, and its function is to prevent the oxidation of the titanium plat...

Embodiment 1

[0057] In this embodiment, the coating titanium anode spray pyrolysis preparation method mainly includes the following steps:

[0058] Step 1, provide titanium plate, and undergo pretreatment such as grinding, degreasing and etching. Specifically, a 1cm×2cm titanium plate is provided, polished with 240# alumina water-grinding paper until a metallic luster appears, then rinsed three times with lye containing sodium carbonate, rinsed with deionized water, and then boiled in 10wt.% oxalic acid Etch for 2 hours.

[0059] Step 2: Coating an intermediate layer, namely an anti-oxidation layer, on the surface of the titanium plate. Specifically, one side of the titanium plate was spin-coated or brush-coated with a layer of conductive glass film ATO with a thickness of 0.5 μm, and baked in an oven at 400° C. for 10 minutes.

[0060] Step 3, the titanium plate is kept at a set temperature during spraying. Specifically, the titanium plate was kept at 250° C. during spraying.

[0061]...

Embodiment 2

[0073] In this embodiment, the coating titanium anode spray pyrolysis preparation method mainly includes the following steps:

[0074] Step 1, provide titanium plate, and undergo pretreatment such as grinding, degreasing and etching. Specifically, a 1cm×2cm titanium plate is provided, polished with 240# alumina water-grinding paper until a metallic luster appears, then rinsed three times with lye containing sodium carbonate, rinsed with deionized water, and then boiled in 10wt.% oxalic acid Etch for 2 hours.

[0075] Step 2: Coating an intermediate layer, namely an anti-oxidation layer, on the surface of the titanium plate. Specifically, one side of the titanium plate was spin-coated or brush-coated with a layer of conductive glass film ATO with a thickness of 0.2 μm, and baked in an oven at 400° C. for 10 minutes.

[0076] Step 3, the titanium plate is kept at a set temperature during spraying. Specifically, the titanium plate was kept at 275°C while spraying.

[0077] St...

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Abstract

The invention belongs to the field of preparing electrodes for electrochemical engineering, and more specifically, relates to a coated titanium anode and a spraying pyrolysis preparation method thereof. The method includes following steps: (1), coating the surface of a titanium plate after being pretreated with an antioxidation layer; (2), controlling temperature of the titanium plate to 250-300 DEG C, and atomizing and spraying electrode preparation raw material slurry onto the surface of the antioxidation layer of the titanium plate; (3), sintering the titanium plate at high temperature to obtain the coated titanium anode. The coated titanium anode is prepared by combining spraying technology with step-by-step thermal treatment, so that the technical defect of short service life of electrodes caused by the fact that coatings are prone to dry-cracking when being baked at high temperature in a brush-coating method in the prior art is overcome ingeniously; quick and accurate preparationof the coated titanium anode is realized, preparation cost is low, and product quality is controllable. On the premise that performance is ensured, coating amount of precious metal is lowered greatly, cost of the coated titanium plate is lowered remarkably, and expansion and parity of applying the coated titanium anode are facilitated.

Description

technical field [0001] The invention belongs to the field of electrode preparation of electrochemical engineering, and more specifically relates to a coating titanium anode and a spraying pyrolysis preparation method thereof. Background technique [0002] Coated titanium anodes are widely used in wastewater treatment, sludge dewatering, clean electroplating, wet recycling, cathodic protection and other fields, and have achieved huge economic and social benefits. At present, the preparation methods of coated titanium anode mainly include thermal decomposition method, electroplating method or ion sputtering method. Known electroplating and ion sputtering methods are not suitable for commercial application. [0003] At present, most of the processes for preparing coated titanium anodes by pyrolysis are brushing techniques. In the known brush coating process, the brush coating paste is printed on the titanium substrate by hand printing or screen printing, and then directly sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12
CPCC23C18/1216C23C18/1258
Inventor 吴旭韦聚才刘道广孙钢范古月圆张艳琳吕航王芳杨家宽
Owner SHANGHAI TECHASE ENVIRONMENT PROTECTION
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