A pickling and phosphating method for a cast iron box of an LED display
A LED display, pickling and phosphating technology, applied in the direction of pressure inorganic powder coating, equipment, metal material coating technology, etc., can solve the problems of poor electromagnetic shielding effect, and the LED display box does not have electromagnetic shielding, etc. Achieve the effect of enhanced corrosion resistance, not easy to fade, and avoid radiation
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specific Embodiment 1
[0052] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,
[0053] Surface treatment is used to remove surface dust, oil, burrs and rust;
[0054] Degreasing uses POH-11 degreasing agent, the pH value is 11, the temperature is 70 degrees, and the time is 8 minutes, which is used to remove surface animals, plants and mineral oil;
[0055] 5% dilute hydrochloric acid is used for pickling, and the pickling time is 5 minutes, which is used to change the properties of the surface o...
specific Embodiment 2
[0060] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,
[0061] Surface treatment is used to remove surface dust, oil, burrs and rust;
[0062] Degreasing uses POH-11 degreasing agent, the pH value is 13, the temperature is 60 degrees, and the time is 12 minutes, which is used to remove surface animals, plants and mineral oil;
[0063] 10% dilute hydrochloric acid is used for pickling, and the pickling time is 2 minutes, which is used to change the properties of the surface...
specific Embodiment 3
[0068] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,
[0069] Surface treatment is used to remove surface dust, oil, burrs and rust;
[0070]Degreasing uses POH-11 degreasing agent, the pH value is 12, the temperature is 65 degrees, and the time is 10 minutes, which is used to remove surface animals, plants and mineral oil;
[0071] 8% dilute hydrochloric acid is used for pickling, and the pickling time is 3 minutes, which is used to change the properties of the surface o...
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