Manufacturing method of antiseptic flame-retarding static conductive composite coating for storage tank

Abstract

The invention relates to a manufacturing method of antiseptic flame-retarding static conductive composite coating for a storage tank, belonging to the technical field of composite coatings. The antiseptic flame-retarding static conductive composite coating is arranged on the surface of a bottom plate of the storage tank and comprises a solvent-free epoxy resin coating, an expansive type anti-flaming coating and a static conductive coating in sequence from the inside out, wherein the expansive type anti-flaming layer contains sulfur; and the preparation process comprises the steps of: (1) carrying out reaction on thiophosphoryl chloride and dipentaerythritol at the temperature of 80-120 DEG C for 12-24h, cooling, filtering and washing, and carrying out vacuum drying on the filtration product; and (2) carrying out reaction on the obtained product and water at the temperature of 80-100 DEG C for 0.5-1.5h, dripping an alkaline pH regulator, adding melamine to react at the temperature of 80-100 DEG C for 40-80 min, washing by ice water after the reaction and carrying out vacuum drying to obtain powdery faint yellow solids. The manufacturing method has the advantages of being simple in structure, stable and reliable in process, high in corrosion resistance, impervious performance and anti-flaming performance of product, and free of environmental pollution, being static conductive and the like.

Description

technical field [0001] The invention belongs to the technical field of composite coatings, in particular to a method for manufacturing an anti-corrosion, flame-retardant and static-conductive composite coating for storage tanks. Background technique [0002] At present, the storage tank is an indispensable facility in the process of oil storage and transportation. The oil medium itself stored in the tank is not very corrosive, but during long-term storage and transportation, the moisture in the oil will gradually settle. At the bottom of the tank, this water contains a lot of CO 2 、H 2 Substances such as S, chloride, and organic acids are highly corrosive and easily cause corrosion and perforation. At present, the epoxy conductive coating with graphite powder, conductive carbon black, metal oxide, etc. as the conductive substance is used on the bottom of the storage tank. After using it for a period of time, the investigation found that the bottom plate of the storage tank...

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Problems solved by technology

[0002] At present, the storage tank is an indispensable facility in the process of oil storage and transportation. The oil medium itself stored in the tank is not very corrosive, but during long-term storage and transportation, the moisture in the oil will gradually settle. At the bottom of the tank, this water contains a lot of CO 2 、H 2 Substances such as S, chloride and organic acids are highly corrosive and easily cause corrosion and perforation

At present, the epoxy conductive coating with graphite powder, conductive carbon black, metal oxide, etc. as the conductive substance is used on the bottom of the storage tank. After using it for a period of time, the investigation found that the bottom plate of the storage tank is prone to corrosion and perforation, and the perforation phenomenon is common.

Once the storage tank is corroded, perforated and oil leaks, it will not only affect the normal operation of production, cause huge economic losses, but also cause certain pollution to the environment

In addition, petroleum is an extremely flammable substance, so the flame retardancy of storage tanks has also received more and more attention. In the past, storage tanks either did not use flame-retardant coatings, or the flame-retardant coatings used were mostly halogen-containing flame-retardant coatings. Although the flame retardant effect is good, there are disadvantages such as excessive smoke, release of toxic and corrosive hydrogen halide gas, and potential technical problems such as secondary hazards.

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