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Surface treatment method of water electrolysis electrode plate that can improve corrosion resistance

A technology of surface treatment and water electrolysis, which is applied in the coating process of metal materials, etc., can solve the problems of threatening the safety of personnel and equipment, interlinking of hydrogen and oxygen gas, alkali leakage, etc., so as to ensure the quality of film formation, improve corrosion resistance, The effect of reducing production costs

Active Publication Date: 2016-08-03
江苏东方九天新能源材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the plates are severely corroded, it will lead to hydrogen and oxygen gas interconnection, alkali leakage and electrical short circuit, which may cause an explosion and threaten the safety of personnel and equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The surface treatment method of the water electrolysis plate of the present embodiment, the specific steps are as follows:

[0025] A. Clean the surface of the carbon steel plate: degreasing, water washing, and pickling in sequence to remove oil, dust, rust, etc. attached to the surface of the plate.

[0026] B. Acid corrosion treatment is carried out on the surface of the plate. Soak the pole plate in an acid corrosion solution at a temperature of 60°C for 10 minutes, so that the surface of the pole plate is initially corroded to form tiny pits, the diameter of which is less than 10 μm. The composition of the acid etching solution is 10wt% nitric acid, 5wt% oxalic acid, and the rest is water.

[0027] C. Ion replacement treatment is performed on the surface of the plate. Soak the polar plate in a copper ion solution at a temperature of 40°C for 5 minutes, so that part of the iron on the surface of the polar plate and in the pits undergoes a substitution reaction w...

Embodiment 2

[0032] The surface treatment method of the water electrolysis plate of the present embodiment, the specific steps are as follows:

[0033] A. Clean the surface of the carbon steel plate: degreasing, water washing, and pickling in sequence to remove oil, dust, rust, etc. attached to the surface of the plate.

[0034] B. Acid corrosion treatment is carried out on the surface of the plate. Soak the polar plate in the acid corrosion solution at a temperature of 50°C for 15 minutes. The composition of the pre-corrosion solution is 8wt% nitric acid, 8wt% oxalic acid, and the rest is water.

[0035] C. Ion replacement treatment is performed on the surface of the plate. Soak the pole plate in a copper ion solution at a temperature of 40°C for 8 minutes, so that part of the iron on the surface of the pole plate and in the pits undergoes a substitution reaction with copper ions, and copper is precipitated. Described copper ion solution is the copper sulfate solution of 200mg / L.

...

Embodiment 3

[0040] The surface treatment method of the water electrolysis plate of the present embodiment, the specific steps are as follows:

[0041] A. Clean the surface of the carbon steel plate: degreasing, water washing, and pickling in sequence to remove oil, dust, rust, etc. attached to the surface of the plate.

[0042]B. Acid corrosion treatment is carried out on the surface of the plate. Soak the plate in the acid corrosion solution at a temperature of 55°C for 8 minutes. The composition of the pre-corrosion solution is 15wt% nitric acid, 3wt% oxalic acid, and the rest is water.

[0043] C. Ion replacement treatment is performed on the surface of the plate. Soak the polar plate in a copper ion solution at a temperature of 40°C for 5 minutes, so that part of the iron on the surface of the polar plate and in the pits undergoes a substitution reaction with copper ions, and copper is precipitated. Described ion solution is the cupric chloride solution of 300mg / L.

[0044] D. ...

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Abstract

The invention relates to a surface treatment method for water electrolysis plates that can improve corrosion resistance. The specific steps include: A. Clean the surface of the carbon steel plate; B. Soak the electrode plate in an acid etching solution with a temperature of 50°C to acid-etch the surface of the electrode plate; C. Soak the electrode plate in a copper ion solution with a temperature of 40°C, and a replacement reaction occurs between iron and copper ions; D. Soak the electrode plate in an alkali corrosion solution with a temperature of 35°C to perform alkali corrosion on the surface of the electrode plate; the alkali corrosion solution is made of a mixture of 10g / L sodium hydroxide solution and 30g / L sodium nitrate solution; E. Place the electrode plate into a strong acid solution with a temperature of 40°C and stir to remove impurities on the surface of the electrode plate; F. Immerse the electrode plate in the treatment solution at 25°C, take it out, rinse it with clean water and dry it; a corrosion-resistant protective film will be formed on the surface of the electrode plate.

Description

[0001] This application is a divisional application. The invention and creation name of the original application: water electrolysis plate surface treatment method, application number: 201210538399.X, application date: 2012-12-13. technical field [0002] The invention relates to a process method for corroding the surface of a carbon steel pole plate and forming a protective film, belonging to the technical field of metal surface treatment. Background technique [0003] Water electrolysis is to decompose water into hydrogen or oxygen under the action of direct current. The electrolyzer is one of the core devices in the whole set of water electrolysis equipment. The water electrolyzers commonly used in industry are composed of dozens to hundreds of electrolysis chambers stacked according to the rules. Each electrolysis cell is composed of an anode plate, an oxygen catalytic electrode, a gas barrier diaphragm, an insulating sealing gasket, a hydrogen catalytic electrode, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C23G1/08C23G1/19C23C22/50
Inventor 康钰康洋范宜锐梅照付梅照丰毛学辉
Owner 江苏东方九天新能源材料有限公司