Minghan vinyl scale mastic Epoxy Mastic anticorrosive material high temperature resin glass scale

  In order to meet the requirements of environmental protection, the wet contact acid gas to sulfuric acid (WSA) technology is widely used to solve the problems caused by acid gas
The process also has the characteristics of strong medium corrosivity, high temperature of treated flue gas, high solid content of SO2 absorption liquid, strong abrasion resistance, large equipment Anti-corrosion area, high construction technology quality requirements, and difficult maintenance after anti-corrosion failure
At present, the commonly used flue anti-corrosion materials include acid resistant brick acid resistant mastic, steel titanium composite structure, steel stainless steel composite structure, etc
, but they all have the disadvantages of large air leakage coefficient, loose sealing and high cost
Therefore, the development and use of a coating that can be used for a long time in the corrosive environment under the dew point of sulfuric acid is of great significance to solve the corrosion of sulfuric acid plant, improve its service life and reduce energy consumption
Vinyl resin glass flake mastic is a thermosetting polymer, which combines the excellent corrosion resistance and mechanical properties of epoxy resin, and has the process performance of rapid curing of unsaturated polyester resin
Vinyl ester resin is a kind of unsaturated resin with vinyl ester groups at both ends of the molecule and epoxy resin as the intermediate skeleton
At present, it has been widely used in the anti-corrosion fields of chemical industry, metallurgy, construction and other national economic departments
In this study, aiming at the corrosive environment in the wet desulfurization unit, phenolic epoxy vinyl ester resin was used as the main film-forming material to optimize the ratio of heat-resistant filler and glass flake, so that the coating had excellent mechanical properties and good corrosion resistance at 180 ℃, and the corrosion resistance of the coating in sulfuric acid solutions at different temperatures and concentrations was discussed to determine the heat-resistant temperature of the coating in sulfuric acid solutions of different concentrations, It provides a basis for practical application
Performance characteristics: 1 Strong corrosion resistance
It has excellent chemical corrosion resistance, especially acid corrosion resistance
2
excellent aging resistance
Its anti-aging property is higher than any paint film 3
good temperature resistance
4
small coefficient of thermal expansion   5
good wear resistance   6
it has good compatibility and can form anti-corrosion coating with various resins 3
5 anti corrosion principle glass flake resin anti-corrosion coating is to mix quantitative glass flakes with certain diameter and thickness with quantitative polyester, epoxy, vinyl and other resins according to the operating procedures
After strict preparation process, it is prepared into mastic or paint
Apply it to the treated metal surface or the surface of other protected materials with tools such as mud trowel or high-pressure airless spray gun
Then it is cured at room temperature to obtain a lining or coating 3
6 advantages of glass flake anticorrosion 1
The penetration of medium, gas and steam is far less than that of ordinary FRP
It is not easy to produce medium diffusion, and can effectively avoid physical damage such as bottom erosion, dispersion, bubbling, stripping, etc
2
Small shrinkage when hardening
Because the glass flake disperses the stress, the residual stress of each contact surface is small, and the coefficient of thermal expansion is also small, so the bonding strength will not decay due to thermal expansion, and the thermal stability is good 3
It has strong abrasion resistance and abrasion resistance
In case of mechanical damage, it is limited to local areas, and the diffusion trend is small
4
Good repairability
After several years of use, the damaged part can be repaired by simple treatment
5
It has strong adaptability to the protective surface, especially suitable for the corrosion protection of complex surfaces 6
Good constructability
The scale anti-corrosion can be applied by spraying, roller coating, scraping and other methods
Good integrity, convenient on-site batching, room temperature curing and thermal curing
Features and uses: glass flake is an indispensable and important raw material for the production of heavy-duty anti-corrosion coatings, pearlescent pigments and plastic products
When applied in the field of anti-corrosion, it can significantly improve the anti-corrosion performance of the coatings and prolong the service life of the objects; Used to make pearlescent pigments, the gloss of glass flake pearlescent pigments is much better than that of natural mica and synthetic mica, and has the functions of anti-corrosion and anti ultraviolet radiation; Used in the plastic field, it can increase the strength of plastic products, prevent the thermal deformation of precision parts made of thermoplastic plastics, and improve their spatial stability
The invention relates to a glass flake resin lined composite steel pipe and pipe fitting and a preparation method thereof
The composite steel pipe and pipe fitting are composed of a steel outer pipe and a glass flake resin lining
The glass flake resin is a cured product of a mixture of thermosetting resin, glass flakes and other additives
The composite steel pipe and pipe fitting have excellent corrosion resistance and mechanical properties, which are far better than 18— 8 stainless steel and ceramic lined steel pipes, and their production cost is only 30% and 50% of that of stainless steel and ceramic lined steel pipes