Epoxy static conducting anti-corrosive paint

Abstract

The present invention discloses a static electricity-conducting anti-corrosive epoxy coating, which comprises a component A and a component B; wherein, the component A is composed of epoxide resin, epoxy active diluent, epoxy-terminated modified urethane resin, flaky conductive mica powder and granular conductive titanium pigment; the component B is composed of modified fatty amine, modified alicyclic amine and curing accelerator; the component A and the component B are mixed according to a proportion to prepare the double-component, non-carbon static electricity-conducting anti-corrosive epoxy coating without solvent. Because the static electricity-conducting anti-corrosive epoxy coating does not use volatile liquid solvent, adopts 100 percent of solid ingredients and uses the technical scheme of polyfunctional flexibilizer and the flaky and granular composite conductive media, the static electricity-conducting anti-corrosive epoxy coating has the advantages of high safety, energy saving, environment-friendliness, good static electricity-conducting property, good anti-corrosive property, one-step spraying and filming and convenient construction, so the static electricity-conducting anti-corrosive epoxy coating is widely applicable to the field of the static electricity conduction and corrosion prevention of oil storage tanks and has a wide market prospect.

Description

[0001] Field of invention [0002] The invention relates to the field of chemical anticorrosion, in particular to an epoxy conductive anticorrosion coating used for anticorrosion on the surface of oil storage tanks. Background technique [0003] In recent years, with the rapid development of my country's petrochemical industry, the protective coating on the inner and outer surfaces of oil storage tanks has attracted people's attention and attention. As we all know, the static electricity generated on the inner surface of the oil tank will cause the combustion and explosion of the oil, and the corrosion of the inner wall of the oil tank will endanger the quality and safety of oil storage. To this end, my country has formulated and issued the GB6950-2001 standard for conductive electrostatic coatings for petroleum tanks, which is enforced as a regulation for the petrochemical industry. As an oil tank inner wall coating, its surface resistivity should be (10 5 ~10 9 )Ω, and at...

AI Technical Summary

Problems solved by technology

In my country, as early as the early 1990s, there was an upsurge in the development of antistatic coatings for oil storage tanks. A series of antistatic coatings have been developed and put into use, but basically they all contain certain organic solvents. It has caused a certain degree of pollution to the environment, and more importantly, many safety accidents have occurred due to the immaturity of technology. For example, pitting corrosion was found in a short period of time in the storage tank. Bottom corrosion, perforation, oil leakage; especially when using these paints during the painting process, due to the volatilization of solvents in the conductive paint, flash explosions are likely to occur and explosion accidents are printed

At present, the problems existing in the domestic electrostatic conductive coatings are: the conductive anti-corrosion, the poor anti-corrosion performance of the coating, which is easy to cause corrosion and perforation of the oil storage tank; After using for a certain period of time, the static conductivity becomes worse or loses the static conductivity; the coatings are all solvent-based coatings, and the solvent-based coatings will be accompanied by the volatilization of the solvent during the film-forming process. Solvent-based coatings, especially solvent-based coatings that cure at room temperature There is always a certain amount of solvent remaining in the film formation, and the volatilization rate of the residual solvent is extremely slow, and the residual solvent can be measured even after a few years. Studies have shown that the adhesion, corrosion resistance and moisture resistance of the residual solvent to the paint film Sex, etc. have adverse effects

For paint films that are cured at room temperature and used at high temperatures, the presence of residual solvents is more harmful. Affected by temperature rise, the residual solvents in the paint film will quickly diffuse outwards, and in severe cases will lead to damage to the paint film. resulting in the failure of the overall protection of the paint film

For solvent-based coatings, when the thickness of the anti-corrosion layer is required to be more than 500 μm, multi-layer brushing is required to achieve the required coating thickness. The volatilization of the solvent makes the paint film of solvent-based coatings inevitably have pinhole defects, and more Layer brushing is also to achieve the purpose of covering the pinholes between the coatings, thereby eliminating this paint film defect. However, due to the influence of the complex construction environment and the construction level of the construction personnel in the field construction, the coating of multi-layer construction is difficult in practice. There is a phenomenon of delamination of the coating in the middle, resulting in the overall failure of the paint film

At the same time, the volatilization of solvents during the construction process not only pollutes the environment and endangers the health of construction workers, but also causes flash explosions due to the volatilization of solvents in a closed environment, which is likely to cause safety accidents