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What is color steel coil
The hot sale prepainted color galvanized coil refers to color coated steel coil, and color coated steel coil is a steel coil with organic coating. Color steel coils are divided into a single board, color steel composite board, floorboard and so on. Widely used in large public buildings, public buildings, mobile panels, and integrated houses for walls and roofs.

Color steel coil features
Prepainted color galvanized coil structure building is light in weight, high in strength, good in overall rigidity and strong in deformation ability. The building's own weight is only one-fifth of the brick-concrete structure, which can withstand hurricanes of 70 meters per second so that life and property can be effectively protected. The sound insulation effect is an important indicator for evaluating the house. The windows installed in the color steel + light steel system are all insulated glass, with good sound insulation and sound insulation of more than 40 decibels. The wall made of light steel keel and thermal insulation gypsum board is soundproofed. The effect can be as high as 60 decibels.

Problems with low cost PPGI prepainted galvanized steel coils
1. Although the hot-dip galvanized substrate with the largest amount of building materials has large production capacity, it lacks a good substrate such as a zinc-free flower galvanized steel coil and a zinc alloy coated steel coil.

2. The variety and quality of domestic coatings cannot fully meet the demand. The high price of imported coatings reduces competitiveness. The plastic film required for the color film of the film still needs to rely on imports. It lacks PPGI prepainted galvanized steel coil with thick coating, functionality, high strength, and rich colors.

A. Material preparation.

For small projects, materials must be prepared in one go. For large-scale projects, material preparation shall be carried out step by step according to the construction organization plan, and a step-by-step supply list shall be submitted to the China aluminum zinc steel coil factory. The specification shall specify the specifications, model, quantity, connection parts and specifications of each batch of steel coils. Etc., and should specify the arrival time and the specified stacking position. After the materials arrive, check the quantity and specifications immediately, and check whether the delivery list matches the actual quantity. When quality problems are found, they need to be dealt with in a timely manner, replaced, substituted or other methods and the problems should be promptly reflected the steel coil manufacturers.

B. Machine preparation.

Due to its lightweight, the steel coil envelope structure generally does not require large machines. Machine tools should be prepared in accordance with the requirements of the construction organization plan, basically the following:

1. Lifting equipment: car crane, winch, pulley, pull rod, hanging plate, etc., according to different project area and height, choose different methods and implements.

2. Hand tools: According to the number of installation teams, electric drills, self-tapping guns, rivet guns, portable circular saws, pliers, screwdrivers, iron scissors, hand tool bags, etc.

3. Power connection equipment: power distribution cabinets with total electricity consumption, wiring according to the number of shifts, distribution sockets, wires, etc. All kinds of power distribution equipment must consider rainproof conditions.

4. Scaffolding preparation: Prepare scaffolding, springboard and safety net according to the requirements of the construction organization plan.

5. Prepare temporary machine storage, place small construction equipment and spare parts for steel coils.

C. Technical preparation.

Carefully review the detailed construction design of the wholesale galvalume steel coating steel coil, the layout of the plate, the structure of the joints and the design requirements of the construction organization; organize the construction personnel to learn the above contents, and explain the construction requirements and regulations to the workers by the technical staff; prepare the construction operation regulations and issue the regulations. Completion date and safety operation rules; preparation details of the construction to be released; check whether the structural installation of the steel coil before installation meets the installation conditions of the enclosure.

D. Site preparation

According to the requirements of the construction organization, the loading and unloading conditions of the steel coil stacking site, the equipment walking route, the lifting position, the horse road setting, the construction road, the location of the temporary facilities, etc. shall be thoroughly checked to ensure smooth transportation, materials are not damaged and construction safety; Site requirements are flat, no water accumulation, no traffic, and materials are not easily damaged; construction roads can be used during the rainy season, allowing large vehicles to pass and turn.

E. Organization and temporary facility preparation

The construction site shall be equipped with the project manager, technical person in charge, safety in charge, quality in charge, material in charge and other management personnel; according to the design requirements of the construction organization, it shall be divided into several working groups, each group shall have a team leader, an installation worker, and a high quality GL Galvanized Steel Coil. Workers in sheet lifting and sheet preparation; the site shall be equipped with electricians, welders and other professionals with employment certificates; temporary construction facilities shall be equipped with on-site offices, tool warehouses, small materials warehouses and rooms for workers to rest and prepare.

The high quality Galvalumed steel sheet is mainly used in construction, so do you know how to store it for galvalumed steel sheet? No matter what items are stored, we need to store it according to local conditions, and also consider various characteristics according to the characteristics of the item.

First of all, we can't store galvalumed steel sheets in the open air. We need to store the galvalumed steel sheets in a clean and tidy warehouse or factory to avoid contact with various corrosive media and galvalumed steel sheets.

Secondly, the ground of the storage place should be flat, free of hard objects and have sufficient load-bearing capacity for the composite board room. Galvalumed steel sheets should be stored in a dry and ventilated indoor environment. They should not be stored in a humid environment for a long time. They should not be stored in an environment with excessive temperature difference. In addition, some special models of galvalumed steel sheets cannot be placed directly on the ground. Pad or padding to avoid injury.

Finally, it is necessary to stack the galvalumed steel sheets reasonably in order of use, so as to minimize unnecessary movement and loss during access.

You should know something about the storage of galvalumed steel sheets. If you want to use your galvalumed steel sheet for a long time, you should use the above method. I believe it will help you. Color steel sheet and low cost Galvalume Corrugated Roofing Sheet are ordered and sold to HENGZE.

Need to pay attention to the production of color galvanized coil.

First, the high quality prepainted color galvanized coil adopts high-quality substrate, and the surface, plate shape and dimensional accuracy requirements of the substrate are increasingly higher. For outdoor use, such as small zinc flower flat hot-dip galvanized steel coil, zinc-free flower flat hot-dip galvanized steel The roll is promptly raised to the hot-rolled zinc alloy coil; indoor use is in the case of electro-galvanized steel coil, film cold-rolled sheet, and aluminum coil.

Second, the process of pretreatment and the pretreatment liquid are improved, the number of equipment is small, and the cost is low, which becomes the mainstream process, and the stability, corrosion resistance and environmental performance of the pretreatment liquid are continuously improved.

Third, pay attention to the development of new coatings, improve the general polyester, polyvinylidene fluoride (PVDF) and plastisol, obtain super color reproducibility, anti-ultraviolet, anti-sulfur dioxide, improve corrosion resistance; develop pollution resistance, suction Functional coatings such as heat.

Fourth, the unit equipment is more complete. Such as the use of new welding machines, new roller coating machines, complete curing ovens, and advanced automation instruments.

Fifth, because cold embossing has a lower cost than hot embossing, it has the characteristics of beauty, three-dimensionality and high strength, which makes the cold embossing production technology become the development trend.

The China high quality prepainted color galvanized coil is designed to prevent corrosion of the surface of the coil and prolong its service life. The surface of the coil is coated with a layer of metallic zinc. This zinc-coated coil is called a galvanized coil or a galvanized steel coil.

Galvanized coils are widely used in construction, automotive, light industry, electronics, agriculture, animal husbandry, fishery, home appliances, commodity packaging, and other industries. In recent years, the demand for color galvanized coils in China's construction, home appliances, and other industries has grown rapidly, and the market potential is large. Especially in recent years, with the rapid development of lightweight structures, the production of cars has increased year by year, and the popularity of household appliances has increased. The large-scale export of electronic products by wholly-owned enterprises has enabled the consumption of galvanized coils to grow rapidly. According to the production method, the galvanized coil is divided into a hot-dip galvanized coil and an electro-galvanized coil. At present, the production of domestic galvanized coils cannot meet the market demand in both quantity and variety. It requires a large number of imports every year. The domestic galvanized coil production market has a low market share. The domestic market is in short supply and the market potential is huge.

Now that the domestic galvanizing coil production line has matured, the output of prepainted color galvanized coils is gradually increasing, but our consumption is still huge. Hot-dip galvanized coil has always been a shortage of metallurgical industry in China. It is the most widely used and the largest output of cold-rolled coating coils. It is widely used in construction, light industry, transportation, home appliances, chemical industry and agriculture. A trend of rapid growth. This has also led to a continuous increase in the China prepainted galvanized steel coil price.

Below, the China prepainted color galvanized coil factory will introduce what the main production process of the galvanized sheet is.

1. Unwinding and welding

The steel coil is unwound, and the steel strip required for continuous operation is provided, and the leading end of the galvanized steel coil and the galvanized steel coil of the preceding galvanized steel coil are welded to ensure continuous production of the unit.

2. Skim cleaning

The cleaning section cleans the surface of the galvanized steel coil to remove the rolling oil and iron powder to obtain good coating adhesion and surface quality, generally including spraying, brushing, electrolytic cleaning, brushing, spraying, squeezing and hot air. Drying and other equipment, the cleaning section is more important for hot-dip galvanizing, and is an important step to obtain the surface quality of a good galvanized steel coil.

3. Annealing

Re-crystallization annealing of the rolled galvanized steel coil to obtain good mechanical properties of the product. By controlling the atmosphere in the furnace to obtain good galvanized steel coil coating performance, the annealing furnace is generally preheated, heated and soaked, cooling and other segments.

4. Air knife zinc layer control

The thickness of the coating on the surface of the hot sale prepainted galvanized steel coil is controlled by blowing a gas, typically air or pure nitrogen, onto the surface of the galvanized steel coil after the zinc pot.

5. Alloying treatment

The alloying treatment is a process of heating a galvanized steel coil after galvanization to obtain a zinc-iron alloy coating layer.

6. Leveling and pulling the correction

Rolling of galvanized steel coils with small rolling force, eliminating the yield platform of low carbon steel, improving the performance of galvanized steel coils, obtaining the desired surface roughness of galvanized steel coils, improving the shape of galvanized steel coils, and obtaining good results Straightness and so on. After the flattening is the tension correction, the tension correction is the stretching and straightening of the galvanized steel coil, the most important is to obtain a good plate type.

7. Post-processing

Passivation or other chemical surface treatment of the galvanized steel coil to obtain the corrosion resistance, lubrication or other requirements desired by the user, generally by spray squeezing or roller coating drying.

8. Trimming

The galvanized steel coil is trimmed as needed to achieve proper width accuracy. 9. Oiling The galvanized steel coil is oiled to obtain certain rust and lubrication properties. Shandong Hengze New Material Co., Ltd. welcomes your patronage, our service e-mail:[email protected]

1. Defect Name: galvanized steel coil - galvanized stripping
Defect performance: dezincification
Cause: Poor furnace temperature, improper handling of the substrate of prepainted galvanized steel coil in stock, etc.

2. Defect Name: galvanized steel coil - ungalvanized
Defect performance: the surface of the steel plate is not galvanized
Causes: poor raw materials, poor pre-treatment degreasing, poor furnace temperature

3. Defect Name: galvanized steel coil - poor zinc flower
Defect performance: zinc flower size of prepainted galvanized steel coil in stock is uneven, no zinc flower
Cause: poor furnace temperature rise, poor cooling control

4. Defect Name: galvanized steel coil - zinc bismuth
Defect performance: spotted on the surface of the coil, attached to the granular zinc residue
Cause: The scum or bottom slag in the zinc pot is attached to the steel strip.

5. Defect Name: galvanized steel coil - oxidation
Defect performance: white rust
Cause: During the storage process, it absorbs moisture from the air and oxidizes.

Thermal reflectivity of galvalumed steel coils
The GL Galvalumed Steel Coil made in China have a high heat reflectivity, which is twice that of galvanized steel coils, which are often used as insulation materials.

Heat resistance of galvalumed steel coil
The galvalumed steel coil has good heat resistance and can withstand a high temperature of more than 300 degrees Celsius. It is similar to the high temperature oxidation resistance of aluminum-plated steel sheets and is often used in chimney tubes, ovens, illuminators, and fluorescent lamps.

In the development of non-chromium passivators, stacking tests, humidity tests and neutral salt spray tests were carried out on trivalent chromium and chromium-free products. Two passivation products were selected for industrial testing and then industrial. The material after the test is provided to the customer for operational testing. According to industrial tests, customer operation tests and corrosion resistance of the product, a chromium-free passivating agent, a pure inorganic passivating agent based on diluted phosphoric acid and zinc phosphate, is selected. The passivation reaction is similar to the chromic acid treatment process.

In the asphalt overburden layer, the high-quality biaxial fiberglass geogrid can disperse the compressive stress and tensile stress of the pavement, forming a buffer zone between the two stressed regions, where the stress gradually changes instead of the mutation, reducing the stress mutation on the asphalt. Destruction of the overcoat. At the same time, the low elongation of the fiberglass geogrid reduces the deflection of the road surface, ensuring that the road surface will not undergo transient deformation. The fiberglass grille is an excellent geosynthetic material used for road surface reinforcement, old road reinforcement, reinforcement of roadbed and soft soil foundation. The semi-rigid product made of biaxial fiberglass geogrid high-strength alkali-free glass fiber is made into a mesh substrate through international advanced warp knitting process and surface-treated. It has high tensile strength and low elongation in both directions of warp and weft, and has excellent properties such as high temperature resistance, low cold resistance, anti-aging, and corrosion resistance, and is widely used in asphalt pavement.

Do you think the waterproof performance of the roof sheet is related to the price? Is the high quality color-coated corrugated roofing sheet pricehigh? So, let's take a look at the details of the roof panel design. The waterproof layer of aerated concrete roof panels is not only the waterproofing requirement of buildings, but also an important measure to protect aerated concrete roofing panels. The coiling materials are still commonly used at home and abroad. Due to the narrow plate and the flat seam butt joint, the overall rigidity is poor. Therefore, if the linoleum is directly laid on the roof panel, the following points should be noted in the design: 1. The waterproof layer of aerated concrete roofing panel should have better overall rigidity in addition to its own waterproof performance. The overall rigidity of the board should be well connected with the main structure. Strengthen the joint between the side seams. If the gap is small and the general cement mortar is used for filling, the color-coated corrugated roofing sheet subjected to anti-rust treatment should be nailed between the joints, or the mortar should be bonded. 2. In the flat roof, generally no slope is found on the upper part of the color-coated corrugated roofing sheet and the slope is determined by the structure. Only when the slope of the support is uniform and flat, the flatness of the board surface can be ensured, and the linoleum can be laid. 3. Before the aerated concrete color-coated corrugated roofing sheet is made of linoleum, there is generally no gas barrier layer in the upper part. The function of the gas barrier on the reinforced concrete roof is to prevent the moisture in the room from penetrating into the insulation through the reinforced concrete roof panel and affecting the insulation effect. However, the aerated concrete roof panel itself is the insulation material, so it is separated in the upper part. The gas layer has lost its meaning. 

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