Preparation method for anti-corrosion coating on surface of cathode plate for zinc electrolysis
A cathode plate, anti-corrosion technology, applied in the direction of electrode, coating, electrolysis process, etc., can solve the problems of reducing the replacement frequency of aluminum plates, prolonging the life, affecting the electrolysis efficiency, etc., and reducing the frequency of replacing the cathode plate, compactness Good, broad application prospects
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Embodiment 1
[0025] (1) Calibration of liquidus line: Select a number of pure aluminum plates used as cathode plates, calibrate the position of their liquid level lines, and delineate the area from the top of the cathode plate to 5cm below the liquid level line as the spraying area;
[0026] (2) Surface treatment of the cathode plate: Clean the surface of the cathode plate with ethanol and acetone in sequence, and then perform sandblasting in the spraying area to remove the oil and oxide film on the surface of the cathode plate, and increase the roughness of the plate surface, thereby increasing the matrix Bond strength of material and coating;
[0027] (3) Powder drying: Dry the zirconia powder with a particle size of 45-75 μm in an oven at 80°C for 2 hours;
[0028] (4) Thermal spraying bonding layer: The thermal spraying technology is used to prepare the bonding layer in the spraying area of the cathode plate;
[0029] (5) Thermal spraying coating: Spray the dried zirconia powder on ...
Embodiment 2
[0034] (1) Calibration of liquidus line: Select a number of pure aluminum plates used as cathode plates, calibrate the position of their liquid level lines, and delineate the area from the top of the cathode plate to 5cm below the liquid level line as the spraying area;
[0035] (2) Surface treatment of the cathode plate: Clean the surface of the cathode plate with ethanol and acetone in sequence, and then perform sandblasting in the spraying area to remove the oil and oxide film on the surface of the cathode plate, and increase the roughness of the plate surface, thereby increasing the matrix Bond strength of material and coating;
[0036] (3) Powder drying: Dry the Hastelloy C-276 powder with a particle size of 25-45 μm in an oven at 80°C for 2 hours;
[0037] (4) Thermal spraying coating: Spray the dried Hastelloy C-276 powder on the spraying area of the cathode plate by thermal spraying technology to form an anti-corrosion coating with a thickness of 150 μm.
[0038] Th...
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