Why is the zinc spraying process added to the anti-corrosion of prefabricated substation?
Aug 07, 2023
Why is the zinc spraying process added to the anti-corrosion of prefabricated substation?
What is the zinc spraying process?
In order to extend the service life of the overall equipment of the electric prefabricated cabin and reduce maintenance costs, the use of corrosion-resistant metal coatings on the metal surface of the prefabricated cabin body, which is based on corrugated boards, is a reasonable and scientific choice. The principle of the overall zinc spraying process is to use arc spraying equipment to heat, melt, atomize, and spray two charged metal wires (such as zinc, aluminum, etc.) to form a anti-corrosion coating. The metal spraying layer is mechanically embedded and combined with micro metallurgy and base metal, which can achieve 30 years of maintenance free for the entire power prefabrication cabin.
What is the process flow for zinc spraying on the prefabricated cabin body?
Substrate weld treatment → Surface sandblasting treatment → Spraying the first layer of zinc coating → Inspection and repair → Spraying the second layer of zinc coating → Coating sealing → Appearance inspection → Peeling inspection → Thickness inspection → Gap inspection → Finished product.
What is the effect of using this zinc spraying process for prefabricated cabins?
By sandblasting the surface of the prefabricated cabin, attachments such as oxide skin, grease, rust, and oil stains are thoroughly removed, presenting a clean substrate surface. It is to treat the collective surface to a higher roughness to increase the bonding area with the coating and enhance adhesion, ensuring that the cabin is tightly bonded with the anti-corrosion and rust resistant topcoat!
The zinc spraying process for prefabricated cabins should pay attention to these!
The temperature should be around 15 ℃. If the temperature of the structural surface is below 0 ℃, the structural surface can be preheated first. Open the spray gun valve, adjust the acetylene pressure valve to 0.10-0.12Mpa, and add a small amount of oxygen for ignition. Before ignition, the mixture of air, oxygen, and acetylene must be removed. The air pressure should be between 0.50 and 0.60MPa, the oxygen pressure should be 0.12MPa, the acetylene pressure should be between 0.10 and 0.15MPa, and the spraying distance should be controlled between 100 and 120mm. Place the zinc wire into the spray gun and extend it 8mm beyond the nozzle, with a maximum length of 12mm. Wipe off zinc white and grease, use purified compressed air to push the zinc wire forward, and cause the molten part to form a mist spray onto the surface of the structure, forming a coating
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| TECHNICAL REQUIREMENTS AND CHARACTERISTICS OF EQUIPMENT | ||||
| Re:82 sets compact substation | ||||
| Item- No. |
Schedule of Technical Data | Unit | Required (at 3000 m |
Offered Data |
| System Data Requirements | ||||
| 1.05.10 | Stranded copper conductor for earthing | |||
| Manufacturer | - | |||
| Material | - | copper | ||
| Cross-section | mm2 | >50 | ||
| Length | m | >40 | ||
| 1.05.11 | Earthing rods | |||
| Manufacturer | - | |||
| Type | - | |||
| Materia! | - | |||
| Length | m | |||
| Sections per rod | pcs | |||
| 1.6 | Compact Substations (Option 1) | |||
| Manufacturer | - | fengyuan | ||
| Type | - | OutDoor | ||
| Overall protection class for complete substation | - | IP 44 | IP 44 | |
| Material of enclosure | - | GI | ||
| Overall dimensions (W x L x H) | ||||
| for S/S with 1x50 kVA transformer | mm/mm/mm | 3000x1850x2150 | ||
| ■ for S/S with 1x100 kVA transformer | mm/mm/mm | 3000x1850x2150 | ||
| for S/S with 1x160 kVA transformer | mm/mm/mm | 3000x1850x2150 | ||
| • for S/S with 1x250 kVA transformer | mm/mm/mm | 3000x1850x2150 | ||
| Overall weight | ||||
| ■ for S/S with 1x50 kVA transformer | kg | 1000kg. | ||
| ■ for S/S with 1x100 kVA transformer | kg | 1000kg. | ||
| ■ for S/S with 1x160 kVA transformer | kg | 1000kg. | ||
| ■ for S/S with 1x250 kVA transformer | kg | 1000kg. | ||
| 1.6.1 | 20 kV Switchgear equipment | |||
| Manufacturer | - | Chnt / Equivalent | ||
| Type | - | Indoor RMU | ||
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