Technical consultation

In recent years, what are the problems of color coated steel plate?: Answer：From the beginning of this century to the present color coated steel plate in addition to the use in decoration, home appliances, cold storage, pipelines and so on, in terms of building materials almost completely replaced the traditional brick and tile. Under the condition that demand trend is constantly optimistic, some production enterprises have competitive advantages in the market for price, and the quality consequences brought by cost reduction and efficiency increase are becoming more and more obvious. In particular, the product in the normal environment of rapid fading, pulverization, rust and other like everywhere, users are very dissatisfied, this is like in china has exceeded 90%. Change this kind of appearance, create value for the user, has become today's color steel production enterprise's morality and responsibility.

What matters need to pay attention to buying color coated steel plate?: Answer：1. Weather resistance: colored steels in a short time fading, pulverization is a very bad thing for users. Color steel surface coating durability bright is the embodiment of the value of the product, so the surface to maintain a long-term novel, weather resistance to reach ten to thirty years of products is the real value of color steel.
2. Corrosion resistance: colored steels in the short term rust, corrosion let the user very disappointed, replace and increase a sum of investment, so buy galvanized layer thick, corrosion resistance of high quality color steel is the user's first choice.

What's the characteristics, coating types, and application of color coated steel coils?: Answer：
The based material of color coated steel coil is magnesium-aluminium-zinc steel coil, after the surface degreasing, rinsing, drying, passivation treatment, and coating organic paint. High quality color coated steel coil has the characteristics of light weight, high strength, weather resistance, corrosion resistance and beauty. 

The common coating types of color coated steel coils are polyester (PE), high weather resistance polyester (HDP), silicon modified polyester (SMP), Polyvinylidene fluoride (PVDF), etc. Among them, polyester (PE) is divided into ordinary, environmental protection, antistatic, high temperature resistance, animal husbandry special class. 

Color coated steel coil is widely used in construction, home appliances, decoration, solar energy, refrigeration and other fields.Users can choose according to the purpose or environment. For example, the external walls of large airports and key projects are recommended to use PVDF or silicon modified polyester (SMP) coated panels; It is suggested to choose environmental protection type antistatic coating steel coil for the housing of home appliances and interior decoration of hospital. For large animal farms, it is recommended to select special coating plates with excellent corrosion resistance.

What matter should pay attention to In the transportation, storage, unloading and use of color coated steel coil?: Answer：
Vehicles should be cleaned, with corresponding protective rubber pad, straw pad or special v-block. At the same time, it is necessary to avoid direct contact between baling and other objects, such as structural parts. Special crane should be used in transportation and hoisting. 

Storage should pay attention to ventilation, moisture-proof, acid-proof, alkali-proof, prevent open storage, storage site should be flat, no hard objects and have enough bearing capacity, avoid multi-layer stacking storage and product has been subjected to a large external force, handling should be careful to handle, to prevent collision, fall lead to deformation or damage. 

Color coated steel coil surface to avoid metal file cuttings, drilling cuttings, cuttings and other metal objects such as rivets and fasteners and other long-term residues, because metal residues by erosion will cause rust spots affect the beauty of color plate, and even destroy the paint film, it is recommended to clean up after the construction. 

According to the design requirements to choose products, the same project as far as possible to choose the same manufacturer, the same batch of products, to avoid color and quality.

The difference between PVDF paint steel coil and nomal paint steel coil: Answer：
PVDF paint steel coil is made of polyvinylidene fluoride fluorocarbon coating. Fluorocarbon is a general name of fluorine-containing resin as the main film-forming substance. Its main characteristic is that the resin contains a large number of f-c bonds, with bond energy of 485KJ/mol, which is the first among all chemical bonds. Under the action of heat and ultraviolet light, f-c bond is hard to break, so it can show its ultra-long weather resistance and corrosion resistance, and its weatherability, chemical resistance and other properties are better than polyurethane, organosilicone, acrylate, etc. 

PVDF paint has been widely used in the fields of architecture, chemistry, electrical electronics, machinery, aviation, aerospace, household products, a large number of examples and Florida exposure test proved that the high-quality PVDF color coated steel coil after more than 30 years, coating without any major color changes, and corrosion resistance is better.

What is the meaning of skin passed?: Answer：
Improve the flatness of the sheet, remove the zinc particles on the surface to make the strip surface more smooth, improve the surface quality and precision of processing products. 

The use of wool finishing, increase the surface roughness of the steel coil, improve the adhesion of the surface coating. 

The lower yield point can be reduced by skin passed, so that the yield platform disappears or becomes less obvious, and the slip line can be prevented during the process of drawing or deep drawing, so as to improve the performance of deep drawing.