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Model No.: SM
Brand: SM
Types of: Coating Production Line
Processing material: Steel
Old and new: New
Video factory inspection: Provided
Mechanical test report: Provided
Marketing type: New Product 2020
Core component warranty period: 1 Year
Core components: PLC
Coating process: Galvanizing
place of origin: China
warranty period: 1 Year
Core selling point: Competitive Price
Out-of-warranty service: Video technical support
Applicable industry: Manufacturing Plant
Where to provide local services (in which countries are there overseas service outlets): Turkey, Viet Nam, India
Showroom location (in which countries are there sample rooms overseas): Viet Nam, Brazil, Indonesia, India
Packaging: Export Package
Productivity: 10Set/Year
Transportation: Ocean
Place of Origin: China
Supply Ability: 10Set/Year
Certificate: CE
Port: Shanghai
Payment Type: L/C
Incoterm: FOB
Delivery Time: 180 Days
1. Technological process
1.1 load material 1.2 check workpiece
1.3enter to the closed room 1.4 pickling
1.5 washing 1.6 fluxing
1.7 out of the closed room after drying 1.8 galvanizing
1.9 cooling 1.10 Non-Chrome passivating
1.11 inspection 1.12 packing
2. Processing before galvanizing
2.1 Acid pickling
The plating pieces will be hanged on the special sling in feeding area, then they will be transported into pickling closed room by rundles and put into the concentration of 15-20% HCl to soak some time, the purpose is to remove the oxide layer and rust on the surface of the plating pieces, and enhance the adhesion strength of the zinc layer; Scale, rust and other iron oxide react with acid solution and become the formation of salt in acid solution that will be removed. Waste acid produced by long-term production will be pumped into the waste acid treatment system to get relatively low concentration acid and be recycled after treatment, it is only need to add new acid. Acid mist can be centralized collection treatment by air pipes in the closed room.
2.2 Plating assistant
Plating pieces have been pickled and rinsed will be put into the plating assistant bath and immerse in ZnCl2 - NH4Cl double salt aqueous about 0.5 ~ 1 min. Using 316L sheathed heater(per set power is 80KW) to heat plating aid to keep the temperature about 50 ~ 70 ℃; Plating solution use online recycling treatment system, control the amount of iron ions and acid content in the solution.
3. Hot-dip galvanizing
The pieces have been plated will put into zinc liquid by crane and quickly open the vibrator vibration to remove the ashes of the clip in the plating parts .According the zinc layer thickness to set the zinc dipping time, hoisted out plating pieces after aborting zinc ash, zinc dust collected by closed gas-collecting hood, it will be treated by dust cleaning equipment processing. Zinc slag and zinc ash can be sold to the downstream manufacturers.
4. Post-processing
4.1 Cool down
The surface temperature is very high when plating piece lifted from zinc pot, so it should be put into warm water to cooled to the normal temperature, otherwise it may produce off color and affect the appearance quality.
4.2 Chromium-free passivation
Cooled parts soak in chromium-free passivation pool more than 60 seconds to form passivation coating on galvanized products surface. It can keep the good appearance quality, prevent white rust during a certain period of time .
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