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Metal materials are damaged by the surrounding medium, which is called metal corrosion.
Metal corrosion involves daily life and countless industrial fields, often causing considerable economic losses and even huge social disasters.
The corrosion protection of materials has attracted great attention.
Although people have conducted a lot of research on new anti-corrosion coatings, there is still an urgent need to further improve the service life of components and the environmental protection of the coating.
Nanocomposite coatings have been widely used in aerospace, marine, automotive, pipeline construction and other industries.
It has been found that when pure graphene is applied in a large area, countless defects will be formed on the boundary of the graphene domain, thereby forming a galvanic couple between the cathode graphene and the anode substrate, resulting in accelerated local corrosion.
Therefore, different methods are used to repair Defects are of great significance.
Composite materials prepared by incorporating graphene into polymers are a common method for preparing anti-corrosion materials, and the prepared materials exhibit excellent physical and mechanical properties and corrosion resistance.
Therefore, this article focuses on the performance of graphene water-based anticorrosive coatings.
Different types of graphene, such as graphene powder, graphene slurry (solution exfoliation method), and graphene oxide, are added to anticorrosive coatings.
Three types of graphite are studied.
The addition of olefin material affects the overall performance of the coating, and the rationality of the result is theoretically demonstrated through electrochemical means.
The effects of the amount of dispersant and the amount of organic bentonite on the storage stability of the coating were investigated.
The effect of dispersant dosage on the viscosity and storage stability of curing agent components 64# rotor was selected, and the viscosity of curing agent components with different dispersant dosages was measured at 12 r/min and 20 r/min, and stored in an oven at 50°C After 30 days, observe its storage stability.
It can be seen from the data that as the amount of dispersant increases, the viscosity of the dispersed curing agent component becomes smaller; in order to investigate the thixotropy of the coating, it is found at different speeds.
With the increase of the amount of dispersant, the difference in thixotropy is not It is more obvious; moreover, it is found that the increase in the amount of dispersant after storage will cause the curing agent component to sink to the bottom.
Therefore, the amount of dispersant in the curing agent component is determined to be 0.
6%.
The effect of thixotropic agent on the viscosity of curing agent components Thixotropic agents can make coatings thixotropic.
When the coating is subjected to shearing force, its consistency decreases.
The greater the shear force, the greater the drop.
When the shear force is removed, the consistency slowly returns to its original state.
It has a lower viscosity under high shear rate during construction, which helps the paint flow and is easy to apply.
It has a higher viscosity under low shear rate before and after construction, which can prevent pigment settling and wet film sagging.
The thixotropic agent used in this research is organic clay 881B, and its dosage has been explored accordingly.
It can be seen from the data in the table that with the increase of 881B organic soil, the viscosity of the curing agent component shows an upward trend, and its thixotropy becomes obvious.
However, in the actual production process, when the viscosity is too high, it cannot be filtered.
Therefore, after investigating the storage stability, it is found that when the thixotropic agent dosage is 1.
7%, there is no sedimentation after storage in an oven at 50°C for 30 days.
It is easy to discharge at times.
Metal corrosion involves daily life and countless industrial fields, often causing considerable economic losses and even huge social disasters.
The corrosion protection of materials has attracted great attention.
Although people have conducted a lot of research on new anti-corrosion coatings, there is still an urgent need to further improve the service life of components and the environmental protection of the coating.
Nanocomposite coatings have been widely used in aerospace, marine, automotive, pipeline construction and other industries.
It has been found that when pure graphene is applied in a large area, countless defects will be formed on the boundary of the graphene domain, thereby forming a galvanic couple between the cathode graphene and the anode substrate, resulting in accelerated local corrosion.
Therefore, different methods are used to repair Defects are of great significance.
Composite materials prepared by incorporating graphene into polymers are a common method for preparing anti-corrosion materials, and the prepared materials exhibit excellent physical and mechanical properties and corrosion resistance.
Therefore, this article focuses on the performance of graphene water-based anticorrosive coatings.
Different types of graphene, such as graphene powder, graphene slurry (solution exfoliation method), and graphene oxide, are added to anticorrosive coatings.
Three types of graphite are studied.
The addition of olefin material affects the overall performance of the coating, and the rationality of the result is theoretically demonstrated through electrochemical means.
The effects of the amount of dispersant and the amount of organic bentonite on the storage stability of the coating were investigated.
The effect of dispersant dosage on the viscosity and storage stability of curing agent components 64# rotor was selected, and the viscosity of curing agent components with different dispersant dosages was measured at 12 r/min and 20 r/min, and stored in an oven at 50°C After 30 days, observe its storage stability.
It can be seen from the data that as the amount of dispersant increases, the viscosity of the dispersed curing agent component becomes smaller; in order to investigate the thixotropy of the coating, it is found at different speeds.
With the increase of the amount of dispersant, the difference in thixotropy is not It is more obvious; moreover, it is found that the increase in the amount of dispersant after storage will cause the curing agent component to sink to the bottom.
Therefore, the amount of dispersant in the curing agent component is determined to be 0.
6%.
The effect of thixotropic agent on the viscosity of curing agent components Thixotropic agents can make coatings thixotropic.
When the coating is subjected to shearing force, its consistency decreases.
The greater the shear force, the greater the drop.
When the shear force is removed, the consistency slowly returns to its original state.
It has a lower viscosity under high shear rate during construction, which helps the paint flow and is easy to apply.
It has a higher viscosity under low shear rate before and after construction, which can prevent pigment settling and wet film sagging.
The thixotropic agent used in this research is organic clay 881B, and its dosage has been explored accordingly.
It can be seen from the data in the table that with the increase of 881B organic soil, the viscosity of the curing agent component shows an upward trend, and its thixotropy becomes obvious.
However, in the actual production process, when the viscosity is too high, it cannot be filtered.
Therefore, after investigating the storage stability, it is found that when the thixotropic agent dosage is 1.
7%, there is no sedimentation after storage in an oven at 50°C for 30 days.
It is easy to discharge at times.
