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Anti-corrosion spraying method for inner wall of chemical storage tank

A technology for anti-corrosion spraying and storage tanks, applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of poor anti-corrosion effect of anti-corrosion coating process, to avoid poor anti-corrosion performance, high mechanical strength, and prevent penetration Effect

Active Publication Date: 2020-07-10
THE THIRD CONSTR CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor anticorrosion effect of the anticorrosion coating process of existing chemical storage tanks

Method used

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  • Anti-corrosion spraying method for inner wall of chemical storage tank
  • Anti-corrosion spraying method for inner wall of chemical storage tank

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034]In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than ind...

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Abstract

The invention provides a corrosion preventive coating method of an inner wall of a storing tank of chemical engineering. The method comprises the following steps: 1) blasting sand on the surface of the inner wall of a tank body; and parkerising and passivating the sand blasted tank body; 2) coating the sand-blasted, parkerised and passivated surface of the tank body with metal powder; roasting the coating under high temperature; and leveling and curing to form a metal powder bottom layer; 3) coating a primer layer on the surface of the metal powder bottom layer; 4) coating an intermediate paint layer on the surface of the primer layer; and 5) coating finish paint on the surface of the intermediate paint layer. According to the method, the treatment technologies of parkerising and passivating the surface of the inner wall of the tank body and coating the metal powder coating are added after sand blasting treatment; the parkerising and passivating treatment is carried out, so that the pickling step performed after a traditional sand blasting technology is avoided, minute sharp corners on the surface subjected to sand blasting treatment are decreased, and the continuity of a foundation corrosion preventive coating is ensured; in addition, the metal powder coating is high in mechanism strength, high in adhesion capacity, outstanding in corrosion and ageing resistance, and capable of effectively transferring static electricity produced by petrochemical mediums in flowing, and realizes electrochemical protecting effect.

Description

technical field [0001] The invention belongs to the technical field of tank body anticorrosion spraying technology, and in particular relates to an anticorrosion spraying method for the inner wall of a chemical storage tank. Background technique [0002] Chemical storage tanks are used to transport or store chemical products, and have high requirements for acid resistance, alkali resistance, anti-corrosion, and anti-static properties. Otherwise, the strength may decrease due to accelerated corrosion, shorten the service life, and may even cause leakage or collapse of the tank, etc. Therefore, it is necessary to conduct a comprehensive analysis of the corrosion factors of chemical storage tanks. From the beginning of tank construction, select the best anti-corrosion coatings, adopt new processes, and strengthen anti-corrosion construction management. [0003] However, the existing chemical storage tanks are usually coated with a layer of zinc-rich or epoxy-based primers and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/22B05D7/00B05D3/10B05D3/12C23C24/08C23C22/05C09D163/04C09D5/08C09D163/10C09D7/61C09D7/63C09D163/00
CPCB05D3/10B05D3/12B05D7/227B05D7/58B05D2320/00B05D2504/00B05D2507/01C09D5/002C09D5/08C09D7/61C09D7/63C09D163/00C09D163/04C09D163/10C23C22/05C23C24/085B05D2425/01B05D2425/03B05D2425/02C08K3/40C08K5/5425C08K5/544
Inventor 孙炎彬吴光海刘鸿杨林闫志奇徐静曾海霞
Owner THE THIRD CONSTR CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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