Surface treatment method for sewage inspection well cover
A technology for surface treatment and manhole cover, applied in the field of surface treatment of sewage manhole cover, can solve the problems of affecting the appearance, easy to corrode and rust, etc., and achieve the effect of saving treatment cost, avoiding corrosion and simple method.
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Embodiment 1
[0017] A surface treatment method for a sewage manhole cover, comprising the following steps:
[0018] (1) Grinding: Freeze the manhole cover produced by casting for 18 hours, reduce the difficulty of grinding and the high temperature generated by grinding, maintain the metallic luster of the manhole cover, and improve the grinding efficiency. Grind it with a 400# abrasive belt, and then clean it with distilled water. Grinding parts;
[0019] (2) Cleaning: Put the polished parts in the cleaning solution and ultrasonically wash them at 50°C and 33kHz for 25 minutes. The cleaning solution contains a variety of ingredients, which can remove debris on the surface of the manhole cover and facilitate subsequent processing. Rinse with distilled water to obtain the cleaned parts ;
[0020] (3) Quenching: Heat the cleaned parts to a temperature of 420°C at a heating rate of 2.4°C / min, keep warm for 2 hours, and place them directly in a urea solution with a mass concentration of 1.3% t...
Embodiment 2
[0026] A surface treatment method for a sewage manhole cover, comprising the following steps:
[0027] (1) Grinding: Freeze the manhole cover produced by casting for 19 hours, reduce the difficulty of grinding and the high temperature generated by grinding, maintain the metallic luster of the manhole cover, and improve the grinding efficiency. Grind it with a 400# abrasive belt, and then clean it with distilled water. Grinding parts;
[0028] (2) Cleaning: Put the polished parts in the cleaning solution and ultrasonically wash them at 55°C and 34kHz for 28 minutes. The cleaning solution contains a variety of ingredients, which can remove debris on the surface of the manhole cover and facilitate subsequent processing. Rinse with distilled water to obtain the cleaned parts ;
[0029] (3) Quenching: Heat the cleaned parts to a temperature of 450°C at a heating rate of 2.5°C / min, keep warm for 2.5 hours, and place them directly in a urea solution with a mass concentration of 1.4%...
Embodiment 3
[0035] A surface treatment method for a sewage manhole cover, comprising the following steps:
[0036] (1) Grinding: Freeze the manhole cover produced by casting for 20 hours to reduce the difficulty of grinding and the high temperature generated by grinding, maintain the metallic luster of the manhole cover, and improve the grinding efficiency. Grind it with a 500# abrasive belt and then clean it with distilled water. Grinding parts;
[0037] (2) Cleaning: Put the polished parts in the cleaning solution and ultrasonically wash them at 60°C and 35kHz for 30 minutes. The cleaning solution contains a variety of ingredients, which can remove debris on the surface of the manhole cover and facilitate subsequent processing. Rinse with distilled water to obtain the cleaned parts ;
[0038] (3) Quenching: Heat the cleaned parts to a temperature of 460°C with a heating rate of 2.6°C / min, keep warm for 3 hours, and place them directly in a urea solution with a mass concentration of 1.5...
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