Preparing method for titanium-based coating titanium anode

A titanium anode and coating technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high electrode potential, poor surface roughening uniformity, breakdown, etc. Effect

Inactive Publication Date: 2019-03-12
XIAN TAIJIN INDAL ELECTROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another scholar researched directly through HF and HNO 3 and H 2 o 2 and corrosion inhibitor mixed solution. Immerse the smooth titanium plate in the mixed solution. After 5-10 minutes, the surface of the titanium substrate becomes rough and scratchable. However, this process is dangerous. It is found that the coating obtained by this method The layer electrode potential is very high, the reason is that the uniformity of surface roughening is poor, the adhesion of the coating is not strong, and the phenomenon of electrode passivation occurs
It can be seen that for the roughening of the anode surface, it is difficult to achieve the consistency of the sintering process of the coating by sandblasting, because the size of the sand particles is different, and the depth of the pits is also different. The adsorption amount is different, and it is easy to form holes in the depth of the pit during sintering. This layer of oxide film is easily broken down by a large current during the electrification process, causing the coating to fall off quickly.

Method used

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  • Preparing method for titanium-based coating titanium anode
  • Preparing method for titanium-based coating titanium anode
  • Preparing method for titanium-based coating titanium anode

Examples

Experimental program
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Effect test

Embodiment 1

[0030] see figure 1 Shown is a schematic flow chart of the preparation method of the titanium-based coated titanium anode provided by the present invention. The preparation method specifically includes the following steps:

[0031] 1) Degreasing and degreasing the titanium substrate;

[0032] 2) activating the titanium substrate after degreasing and degreasing treatment;

[0033] 3) performing laser etching on the activated titanium substrate;

[0034] 4) removing titanium chips on the titanium substrate;

[0035] 5) placing the titanium substrate treated in step 4) in an acid solution for acid etching;

[0036] 6) cleaning the acid-etched titanium substrate by ultrasonic waves;

[0037] 7) After the cleaned titanium substrate is dried, it is brushed and sintered to complete the preparation of the coated titanium anode.

[0038] Further, the grid size of the laser etching in the step 2) is 0.02mm-1.5mm.

[0039] Further, the acid solution in step 5) is a mixed acid solut...

Embodiment 2

[0046] In order to prove the feasibility of the preparation method provided by the invention, Figure 3-Figure 5 is through figure 2 Model research, experiments were carried out in oxygen-evolving and hydrogen-evolving anodes, the coating system was Ir-Ta system formula and platinum-plated anodes, and the sintering and spraying processes were repeated, and finally the surface structure of the coating seen from the microscope can be clearly seen Seeing that the coating is in a regular arrangement, SEM-EDS found that the IrO of the coating 2The active points are evenly distributed and the coating has less cracks, which can meet the requirements of the coating surface performance.

[0047] When the coated titanium anode is a chlorine-analyzing electrode, for example, a ruthenium-iridium-titanium (RuIranTi) anode sample has a size of 80 mm × 50 mm × 2 mm, which is treated by laser surface etching, and whose grid size is 0.2 mm × 0.2 mm, prepared by brushing Single side coated e...

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Abstract

The invention belongs to the technical field of electrochemistry industry titanium electrode preparing, and relates to a preparing method for a titanium-based coating titanium anode. The preparing method specifically comprises the following steps including titanium base body pretreatment, namely oil removal and degreasing, activating treatment, laser etching, titanium scrap removal, acid treatment, ultrasonic cleaning, drying, coating sintering and finished product obtaining. According to the preparing method, roughening treatment is conducted on the surface of a titanium base body through a laser etching method, the method is simple in usage and free of pollution, oxide skin generated by the titanium base body can be rapidly treated, and long-time treatment through an acid solution is notneeded any more; any regular roughening arrangement can be obtained, grid gaps are easily fully filled with coatings, a uniform and dense structure is obtained, meanwhile, the large-current work intensity can be borne, and corrosion resistance is high.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium electrodes in the electrochemical industry, and relates to a preparation method of titanium-based coated titanium anodes. Background technique [0002] Titanium anodes are widely used in solution-related industries, such as chlor-alkali industry, hypochlorite, persulfate, electrolytic water treatment, industrial water treatment, hydrometallurgy, aluminum foil copper foil manufacturing, steel plate galvanizing, cathodic protection, seawater desalination , Electroplating industry, etc. The life of a titanium anode is directly affected by the preparation process, coating formula, and coating thickness, and as each different anode, its preparation process and coating formula are different. The coated titanium anode uses titanium as the substrate, and through a certain surface treatment process, a canine-shaped, uneven pitted surface with a large specific surface area is obtained, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C25B1/26C23F1/26
CPCC23F1/26C25B1/04C25B1/26C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 贺斌冯庆马振佳窦泽坤王淼王正
Owner XIAN TAIJIN INDAL ELECTROCHEM TECH
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