Surface treatment method for water electrolysis pole plate capable of forming protective film
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, explosion, etc., so as to ensure the quality of film formation, improve corrosion resistance, reduce The effect of production costs
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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 pole 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 pole plate and in the pits undergoes a substitution reaction wit...
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
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