Common knowledge of coating: what is bridge coating? What are the characteristics of bridge coating

Core tip: the bridge can be divided into railway bridge and highway bridge, and the two bridges can be combined if necessary In the layout of bridge deck, the railway bridge is mainly truss beam, and the highway bridge is mainly box beam With the development of science and technology, anti-corrosion paint for bridges has developed from alkyd resin paint to chlorinated rubber paint, polyurethane resin paint, fluorine resin paint and silicone paint, as well as new cold galvanized paint in recent years Characteristics of bridge coating: 1 It has good cohesiveness with the deck concrete, no peeling and falling off 2 It can be bonded with asphalt concrete deck pavement as a whole 3, impermeable Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: the bridge can be divided into railway bridge and highway bridge If necessary, the two bridges can be combined In the layout of bridge deck, the railway bridge is mainly truss beam, and the highway bridge is mainly box beam With the development of science and technology, anti-corrosion paint for bridges has developed from alkyd resin paint to chlorinated rubber paint, polyurethane resin paint, fluorine resin paint and silicone paint, as well as new cold galvanized paint in recent years Characteristics of bridge coating: 1 It has good cohesiveness with bridge deck concrete, no peeling and falling off 2 It can be bonded with asphalt concrete deck pavement as a whole 3 It is impermeable and puncture resistant, and has certain tensile strength and ductility to adapt to deformation 4 There is no special requirement for the surface quality of deck concrete, so the construction is easy The coating materials of bridge steel layout paint are mainly divided into alkyd paint resin, chlorine rubber paint and polyurethane resin paint Alkyd resin paint alkyd paint resin is an ester prepared by esterification and polycondensation of oil, polyol and polyacid The type and development trend of bridge steel structure paint the function of paint has a great relationship with the content of fatty acid (oil degree), which is used as anti-corrosion paint The type and development trend of bridge steel structure paint after drying, the paint film is not easy to aging After curing, hydroxyl and carboxyl groups remain in the paint film, which make the paint film have better adhesion than oil paint The types and development trend of bridge steel structure paint have the characteristics of fast drying, good color retention, good adhesion, but poor acid and alkaline resistance and water resistance There is scope to deal with acid rain and the use of underwater steel structure Now, it is possible that alkyd resin and various kinds of resin are used in bridge paint Chlorinated rubber paint is usually used in bridge paint Rubber resin for paint is made of natural or synthetic rubber by chlorination Chlorinated rubber paint is a kind of white porous solid material made from natural rubber or isoprene rubber dissolved in carbon tetrachloride through chlorine gas The paint film is dense and brittle, and often takes part in chlorinated white wax as plasticizer The paint film has good adhesion, excellent resistance to water, acid, alkali, salt and corrosion However, the coating is not resistant to high temperature, and hydrogen chloride gas is easily separated out at high temperature for degradation, and the utilization temperature is generally not higher than 60 ℃ Chlorinated rubber is the rubber in the carbon tetrachloride in the chlorine gas and then in the water precipitation, product residual carbon tetrachloride, pollution of the atmosphere, limited by environmental protection, some manufacturers have been shut down production At the same time, the type and development of bridge steel structure paint tend to paint surface because of the poor weather resistance, it will be powdered in two or three years, so the aliphatic polyurethane finish with outstanding weather resistance, especially the acrylic modified polyurethane paint with excellent recoating function, will soon replace the chlorinated rubber finish Polyurethane paint with carbamate chain in its molecular structure is the type and development trend of bridge steel structure paint, which is generally produced by the reaction of isocyanate and hydroxy (or carboxyl) compounds Because there are a lot of hydrogen bonds in the paint film, the paint film is solid, wear-resistant and full, and the paint film has excellent corrosion resistance; the aromatic polyurethane paint has good comprehensive function, many varieties and wide application, but there is a tense defect, that is, the oil paint film tends to turn yellow and lose light when exposed to ultraviolet light, while the aliphatic polyurethane paint has no such defect, Lifting platform, with high weather resistance, lifting platform, can be used as high paint Polyurethane paint is widely used, lifting platform, the most pivotal is the polyfunctional group of isocyanate in polyurethane, which can be combined with a variety of resins to meet the different utilization requirements The resins that can be used together are polyester, polyether, epoxy, alkyd, hydroxy acrylic, silicone resin, etc Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and 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