Method for preparing aluminum part surface zincing powder and method for coating aluminum part surface zincing powder
A technology of galvanization and aluminum parts, which is applied in the field of galvanization treatment on the surface of aluminum parts, can solve the problems that it is difficult to maintain the corrosion resistance of aluminum and its alloys, and achieve the effect of high corrosion resistance and increased corrosion resistance
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Embodiment 1
[0020] (1) 52g of zinc powder; (2) 206.96g of silicon dioxide powder; (3) 0.52g of ammonium chloride; (4) 0.52g of ammonium sulfamate.
[0021] First, accurately weigh the above components, grind and mix them evenly, and the maximum diameter of the particles in the components should not exceed 150 microns. Put the mixed zinc treatment powder and the aluminum parts to be zinc treatment together in a sealed steel tank, then heat the steel tank and control the temperature at 410°C, keep the temperature for 180 minutes and then cool to room temperature.
[0022] The aluminum parts were separated from the zinc treatment powder for passivation treatment, and then subjected to a neutral salt spray test. After 1200 hours of the test, no significant rust was found on the surface of the aluminum parts.
Embodiment 2
[0024] (1) Zinc powder of 129.5g; (2) Aluminum oxide powder of 129.5g; (3) Ammonium nitrate of 0.5g; (4) Ammonium sulfamate of 0.5g.
[0025] First, accurately weigh the above components, grind and mix them evenly, and the maximum diameter of the particles in the components should not exceed 150 microns. Put the mixed zinc treatment powder and the aluminum parts to be zinc treatment together in a sealed steel tank, then heat the steel tank and control the temperature at 400°C, keep the temperature for 120 minutes and then cool to room temperature.
[0026] The aluminum parts were separated from the zinc treatment powder for passivation treatment, and then subjected to a neutral salt spray test. After 1600 hours of the test, no significant rust was found on the surface of the aluminum parts.
Embodiment 3
[0028] (1) 149g of zinc powder; (2) 20g of silicon dioxide powder; (3) 28.5g of aluminum oxide powder; (4) 0.8g of ammonium nitrate; (5) 0.4g of ammonium sulfamate.
[0029] First, accurately weigh the above components, grind and mix them evenly, and the maximum diameter of the particles in the components should not exceed 150 microns. Put the mixed zinc treatment powder and the aluminum parts to be zinc treatment together in a sealed steel tank, then heat the steel tank and control the temperature at 390°C, keep the temperature for 90 minutes and then cool to room temperature.
[0030] The aluminum parts were separated from the zinc treatment powder for passivation treatment, and then subjected to a neutral salt spray test. After 1500 hours of the test, no significant rust was found on the surface of the aluminum parts.
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