Polyaniline coating capable of blocking and controlling chlorine ion penetration and preparation method thereof

Abstract

The invention discloses a polyaniline coating capable of blocking and controlling chlorine ion penetration and a preparation method thereof. The polyaniline coating capable of blocking and controlling the chlorine ion penetration comprises the following components in parts by weight: 35-85 parts of film forming substance, 1-25 parts of polyaniline, 0.01-10 parts of chlorine ion blocking and controlling agent, 0.1-5 parts of pigment, 1-15 parts of filler, 0.01-2 parts of anti-sag agent, 0.01-2 parts of dispersing agent, 0.01-2 parts of leveling agent, 0.01-0.5 part of defoaming agent and 5-65 parts of solvent. The preparation method comprises steps that components except polyaniline and chlorine ion blocking and controlling agent are uniformly stirred, then polyaniline and chlorine ion blocking and controlling agent are added, then grinding is carried out in a coating grinder and discharging is carried out after fineness is less than 60 microns. The polyaniline coating capable of blocking and controlling the chlorine ion penetration has the advantage that corrosion resistance and chlorine ion penetration resistance are obviously improved and can be applied to heavy corrosion protection projects such as petrochemical equipment, pipelines, oil platforms on the sea, wharf facilities and ships, especially applicable to heavy corrosion coating operation on the sea.

Description

technical field [0001] The invention relates to paint technology, in particular to a polyaniline paint for resisting and controlling chloride ion penetration and a preparation method thereof. Background technique [0002] The marine environment is a complex and harsh corrosive environment. Seawater itself is a strong corrosive medium. At the same time, marine engineering facilities and equipment will be subjected to low-frequency reciprocating stress and impact caused by waves, waves, tides and currents in the marine environment, plus marine microorganisms, attached organisms and their metabolism. Products, etc. have a direct or indirect acceleration effect on the corrosion process, and the service life of various steel structures is much lower than that of the general inland outdoor environment. As the country speeds up infrastructure construction projects, a large number of major projects such as offshore survey platforms, oil production platforms, offshore oil and gas ga...

AI Technical Summary

Problems solved by technology

The patent (ZL200810012653.6) introduces a polyaniline modified anti-corrosion coating, which reduces the toxicity of the coating by treating the pigment with polyaniline. The patent (ZL200810012657.4) introduces a polyaniline modified aluminum powder anti-corrosion coating and Its preparation method aims to solve the poor anticorrosion performance of existing aluminum powder coatings and the environmental protection problems of pigments. The defect is that the synergistic effect of zinc powder on aluminum powder is not considered, and the overall performance of the coating is limited.

The important feature of the marine environment is high salinity. Chloride ion is one of the most important factors affecting marine corrosion. The anti-corrosion coating needs to have good corrosion resistance and resistance to chloride ion penetration. At present, this problem has not been effectively solved. Therefore, it is of great significance to develop a coating that can prevent and control the diffusion, migration and penetration of chloride ions in the coating, so as to better protect marine facilities and equipment.

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