Views: 10 Author: Site Editor Publish Time: 2021-01-06 Origin: Site
At present, the advantages of rigid polyurea with its excellent physical and chemical properties and advanced and convenient construction technology in the anti-corrosion application of the outer wall of the pipeline have been highlighted. Compared with 3PE, the rigid polyurea spraying equipment has occupied the anti-corrosion of the outer wall of the buried steel pipeline. Increasing market share.
Technical use of polyurea spraying equipment in anti-corrosion of pipeline outer wall
The famous German MANNESMANN steel pipe company has launched a three-layer structure polyethylene anticorrosive coating (3PE), which is a new type of anticorrosive steel pipe coating that organically combines the European 2PE anticorrosive coating and the North American epoxy powder coating (FBE) Layers, the first layer is epoxy powder (FBE), the second layer is adhesive (AD), and the third layer is polyethylene (PE). 3PE is widely used because of its excellent physical and chemical properties. But at the same time, the problems of the 3PE coating itself have gradually emerged, mainly manifested in the peeling and peeling of the coating and the steel pipe.
Polyurea spray equipment adhesive and epoxy powder detached, causing warping, stress defects at welds, and inconsistencies between the treatment of elbows, tees and other joints and the main pipeline, which are hidden dangers of coating detachment. Therefore, in view of the shortcomings of the 3PE material itself and the molding process, the new material and new process of rigid polyurea greatly solve the problems of 3PE, thereby greatly reducing the original coating and steel pipe The separation phenomenon extends the service life of the buried steel pipe.
The coating of the elastomer material of the polyurea spraying equipment is continuous, dense, no pinholes, no joints, and a large film thickness at one time, so it exhibits excellent heavy-duty corrosion under harsh environmental conditions such as acid, alkali, salt, underground and ocean performance. With advanced construction technology, the material has broad application prospects in the fields of chemical storage tank lining, tunnel, marine steel structure and concrete structure.
Polyurea spray equipment is often used in construction, mainly because polyurea has a strong anti-corrosion effect. It has a certain adhesion and strength. In order to improve the adhesion of the layer, you need to strictly control the selected base material and improve it if necessary. Then there are several types of anticorrosive coatings for polyurea spraying equipment. The form of attachment.
1. Chemical bond adhesion: The chemical bond produced by the chemical reaction is the most effective way for polyurea spray equipment paint to adhere to the surface of the object. One example is metal hot dip coating, which produces the mixing and mutual melting of steel and metallic zinc on the surface of the steel. The silicate molecules in the inorganic zinc-rich primer also form chemical bonds with the steel surface. These bonds are the actual reaction between the chemical functional groups of the coating and the components of the substrate to form chemical bonds.
2. Mechanical adhesion: Mechanical adhesion is related to the roughness of the surface of the object. In fact, the surface area of a rough surface is larger than that of a smooth surface, and the adhesion area between the coating and the substrate is also increased; coupled with a certain rough shape, the coating and the rough substrate surface form a "tracing solid" combination , The adhesion will increase.
3. Polar adhesion: The adhesion caused by polarity is more common in organic coatings than the adhesion caused by chemical bonds. Polar adhesion is the attraction of resin molecules to the surface of the substrate. In this case, the resin acts like a weak magnet's north and south poles attracting the opposite groups of the substrate. This is the meaning of "polar". In fact, the polar group is the positive or negative charge in the coating molecule that attracts the opposite charge of the substrate.
The air permeability and water permeability of the anticorrosive coating of polyurea spraying equipment are relatively low. You can use less air-permeable base materials as filler materials. If spalling occurs during construction, it is due to the surface of the building, so you need to analyze the specific conditions of the construction in detail.
Polyurea spraying equipment can be applied to building roofs, tunnels, subways, waterproofing of roadbeds, production of foam membranes and TV props, internal and external corrosion protection of pipelines, auxiliary cofferdam works, corrosion prevention of storage tanks and chemical tanks, pipeline
As we all know, polyurea spraying equipment is an essential tool in life, because of his wide range, multi-purpose, so that we not only in the enterprise even our life also change together. Then want to use good polyurea spraying equipment is not so easy, this time I will bring you after the use of
Polyurethane rigid foam in the state before molding is two kinds of liquid, in the molding of these two kinds of liquid mixing, through the polyurethane spraying machine to become a solid raw material, so the construction molding method is more mobile. As long as it is not crushed polyurethane rigid
Polyurethane foaming process, foam shrinkage, crispy, too soft, heartburn, cracking, smoke and other problems, how to analyze what causes.Polyurethane foaming process by the construction conditions, foaming equipment, construction technology and the impact of environmental temperature, there will be
The common ones are high pressure spraying, polyurethane spraying, hybrid spraying, and polyurea spraying. The construction industry usually uses high pressure sprayers, mostly for industrial production.High-pressure polyurethane spraying machine types:1, from the material of the spraying material i
Polyurethane foaming machine began to appear in foreign countries, with the ease of use and high efficiency by the production industry, and to be widely promoted and used. The polyurethane foaming machine directly determines the quality of the foam produced, even if the quality of the blowing agent
On April 12, CNMC-E3 polyurethane spraying machine was loaded in the industrial park and will be exported to France soon.CNMC-E3 polyurethane spraying machine is widely used in industrial maintenance, tunnel, subway, waterproofing of road base, production of foam film and television props, pipeline
Due to the demand of the production scale, many manufacturers will choose small polyurethane infusion foaming machine to help products for foaming, which can be more convenient for bonding, and in the subsequent use of the process is also more convenient for maintenance. So what are the characterist
Spring Festival does not close, for this year's Spring Festival holiday, CNMC Machinery's Ali International Station store got a good start. We started the year with a salesman, we harvested more than 1.4 million in sales, of which the largest single order reached one million.CNMC Machinery is a subs
Polyurethane sprayers may require special coatings and construction parameters when working with certain specialized types of wood. The following are some common types of specialty woods: