| Customization: | Available |
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| After-sales Service: | Supported |
| Warranty: | Supported |
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For galvanized coils, the sheet steel is immersed in a molten zinc bath to make a sheet of zinc coated on its surface. It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in a plating tank with zinc melted to make galvanized steel plate; alloyed galvanized steel plate. This kind of steel plate is also manufactured by hot dip method, but immediately after being out of the tank, it is heated to about 500 ºC to form an alloy coating of zinc and iron. This galvanized coil has good paint adhesion and weldability.
The main reasons for the peeling of the zinc layer are: surface oxidation, silicon compounds, the cold rolling emulsion is too dirty, the oxidizing atmosphere in the NOF section and the dew point of the protective gas are too high, the air-fuel ratio is unreasonable, the hydrogen flow rate is low, the furnace has oxygen infiltration, strip steel The temperature of entering the pot is too low, the furnace pressure in the RWP section is too low, the suction of the furnace door is too low, the furnace temperature in the NOF section is too low, the grease is not fully evaporated, the aluminum content of the zinc pot is too low, the unit speed is too fast, the reduction is insufficient, and the zinc solution stays in the liquid The time is too short and the coating is too thick.
The reasons for the occurrence of white rust and black spots are: black spots are formed by further oxidation of white rust.
The main reasons for white rust are:
(1) Poor passivation, insufficient or uneven thickness of the passivation film;
(2) The surface is not oiled or there is residual moisture on the surface of the strip;
(3) The strip surface contains moisture during coiling;
(4) Passivation is not completely dried;
(5) damp or rain-drenched during transportation or storage;
(6) The storage time of finished products is too long;
(7) The galvanized sheet is in contact with or stored together with other corrosive media such as acid and alkali.
The finished product is allowed to be stored in the warehouse for a maximum of three months to avoid oxidation caused by storage for too long.
| Product name | Galvanized steel Coils |
| Brand Name | Kaishuo Weiye |
| Place of Origin | Tianjin,China |
| Shape | Round Coils |
| Application | Construction, Machinery, Coal Mine, Chemical Industry, Electric Power, Railway Vehicles, Automobile Industry, Highways, Bridges, Containers, Sports Facilities, Agricultural Machinery, Petroleum Machinery, Prospecting Machinery, Greenhouse Construction |
| Thickness | 0.8 - 12.75 mm/ As your require |
| Length | 12M, 6m, 6.4M, Customer's Request |
| Standard | EN, BS, JIS, etc |
| Certificate | API, ce, Bsi, RoHS, SNI, BIS, SASO, PVOC, SONCAP, SABS, sirm, tisi, KS, JIS, GS, ISO9001 |
| Technique | ERW |
| Grade | Q195/Q215/Q235/Q345/10#/20# |
| Surface Treatment | Galvanized |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Oiled or Non-oiled | Non-oiled |
| Invoicing | By theoretical weight |
| Delivery Time | 8-14 days |
| MOQ | 1 Ton |
| Sample | Provide Sample Service |
| Package | Seaworthy Standard Package |
We have multiple quality system certifications to ensure that high-quality products reach your hands.
What we offer:
1) Good quality control
2) Highly competitive prices
3) state-of-art technology products
4) Smooth communication
5) Effective OEM&ODM service
Tianjin Kaishuop Weiye Steel Co., LTD established in 2000.The company's main business: various types of angle steel, channel steel, I-beam, H-beam, steel plate, square tube and other profiles, which can meet the needs of customers in different industries for special specifications of various steels. We can provide products such as plates, pipes, profiles, building materials, special steel, stainless steel and non-ferrous metals.
With many years of experience in the steel industry, the company has a strong ability to control the market. According to the market demand, the company adjusts the inventory in a timely manner. The annual inventory is more than 10,000 tons, which can guarantee to meet the needs of market customers. The sales network has spread all over the world. We have exported more than 100countries like USA, Mexico, Canada, Spain, Russia, Singapore, Thailand, India etc
The factory area of Tianjin Kaishuo Weiye Steel Co., LTD covers an area of about 70,000 square meters, and has processing equipment such as large shearing machine, circular shearing machine, straightening machine, annealing furnace, punching and shearing production line.
The annual inventory is more than 10,000 tons, which can guarantee to meet the needs of market customers. The sales network has spread all over the world. We have exported more than 100countries like USA, Mexico, Canada, Spain, Russia, Singapore, Thailand, India etc
The quality of our products has been certified by ISO9001,SGS, JIS, BV, etc., and each product has a product inspection report to support customer inspection.
Sufficient inventory, now orders can be shipped directly, 7*24 hours online service, professional sales and after-sales service team, to solve various problems for you.
We have a strict quality control system, which can be customized according to your size. The price is low and the quality is high. Send us an inquiry now to get more discounts.
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